LTR4-512
LTR8-512
LTR8-512M
Master Clock
Installation & User's Guide
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Table of Contents
Welcome..........................................................................................................1
Step 1 - Mounting the Master.................................................................................2
SURFACE MOUNT....................................................................................................2
SEMI-FLUSH MOUNT ................................................................................................3
RACK MOUNT .......................................................................................................5
HIDDEN POWER SUPPLY MOUNT ....................................................................................6
Step 2 – Wiring the Master ....................................................................................8
POWER SUPPLY – LTR8.............................................................................................8
POWER SUPPLY – LTR4.............................................................................................9
Step 3 – Setting Up the Master ...............................................................................11
Function Descriptions ..........................................................................................18
QUICK CHECK COMMANDS ..........................................................................................18
QUICK CHECK COMMAND [*] STATUS ...............................................................................18
QUICK CHECK COMMAND [1] EDIT KEYS ............................................................................18
QUICK CHECK COMMAND [3] 12/24 HOUR DISPLAY................................................................18
Program Keys ....................................................................................................18
[0] = PASSWORD....................................................................................................19
[1] = SET DATE AND TIME ..........................................................................................19
[2]=SELECT CLOCK CONTROL ......................................................................................21
[3]=MANUAL BELL CONTROL .......................................................................................21
AUTO BELL TEST....................................................................................................22
[4]=PROGRAM SCHEDULES..........................................................................................22
[6]=ENABLE OR DISABLE CIRCUITS..................................................................................26
[7]=DAYLIGHT SAVINGS ............................................................................................26
[8]=CHANGE ACTIVE SCHEDULE ....................................................................................26
[9]=SYNC CLOCKS ..................................................................................................27
[A]=PROGRAM HOLIDAYS ...........................................................................................28
[B]=COMMUNICATIONS (LTR8-512 AND LTR8-512M ONLY)......................................................29
[C]=CHANGE PASSWORD ...........................................................................................29
APPENDIX A - SPECIFICATIONS ................................................................................30
APPENDIX B – DAYLIGHT SAVINGS COUNTRY CODES.......................................................31
APPENDIX C1 - SECONDARY CLOCK TYPE CODES...........................................................32
APPENDIX C2 - WIRING SECONDARY CLOCKS ................................................................33
APPENDIX D - WIRING DIAGRAMS: POWER, BELLS, ETC. ..................................................50
FIG. D1 - TERMINAL BLOCK ‘P4’................................................................................50
WIRING THE LTRx-512 FOR 120VAC (nom.) OPERATION...............................................50
WIRING THE LTRx-512 FOR 220/240VAC (nom.) OPERATION.........................................50
FIG. D2 - TYPICAL SIGNAL DEVICE WIRING ...................................................................51
FIG. D3 - COMPUTER CABLE ....................................................................................52
FIG. D4 - RS-232 CABLE .........................................................................................52
FIG. D5 - SYNCHING UP TO 60 RS-485 TIME SYNC DEVICES.................................................53
FIG. D6 - LTRX-512 USED AS SLAVE TO ALLOW 30 EXTRA RS-485..........................................53
FIG. D7 – COMMUNICATION TERMINAL BLOCK ...............................................................54
FIG. D8 - POWER SUPPLY TERMINAL BLOCKS.................................................................56
APPENDIX E – INSTALL THE OPTIONAL MODEM .............................................................57
APPENDIX F – Connecting the LTR-GPS Satellite Receiver / Synchronizer ............................58
APPENDIX G – POWER SUPPLY SCHEMATICS.................................................................59
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LTRx-512 Installation and User’s Guide
Welcome
Thank you for purchasing your new MASTER CLOCK. You can use your new Master to ring bells or turn on
circuits for up to 99 seconds, as well as to synchronize the time on secondary wall clocks or devices.
This manual covers 3 models of MASTER clocks: the LTR4-512, the LTR8-512 and the LTR8-512M
LTR4-512
LTR8-512
LTR8-512M
System Clock
Correction
1 correction type
running, plus RS485
correction
Up to 2 like or dissimilar
correction types running
simultaneously, plus RS485
correction
Up to 2 like or dissimilar
correction types running
simultaneously, plus
RS485 correction
Bell Circuits
4 with no clock
correction
2 with 1 clock
correction
UL, cUL,
8 with no clock correction
6 with 1 clock correction
4 with 2 clock correction
8 with no clock correction
6 with 1 clock correction
4 with 2 clock correction
Certifications
UL, cUL,
UL, cUL,
FCC
FCC, DOC (internal modem FCC, DOC (internal
option)
modem)
PC Interface
Software
None
RS-232, RS-485,
Ethernet (requires TXTOSER Modem , Ethernet
RS-232, RS-485,
+ Cable)
(requires TXTOSER +
Cable)
Atomic clock
synchronization
Yes. Requires LTR-GPS
Yes. Requires LTR-GPS or
MasterLink software
Yes. Requires LTR-GPS or
MasterLink software
If your Master has 4 lights on the front panel, then you have the model LTR4-512
1
4
2
5
8
0
3
6
1
2
3
4
7
9
CLK 1
#
*
cancel
enter
If your Master has 8 lights at the left of the front panel, then you have the model LTR8-512. If the TR
light at the keypad is lit, then you have the model LTR8-512M
1
4
7
SD
TR
RD
CD
2
5
8
0
3
6
1
5
2
6
3
7
4
8
9
CLK 2
CLK 1
#
*
cancel
enter
1
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LTRx-512 Installation and User’s Guide
Step 1 - Mounting the Master
The Master comes ready to surface mount on the wall. However, you can also install the Master in a
standard 19" rack, recess the power supply into the wall or hide the power supply in the floor or ceiling
and hang only the display unit on the wall with optional hardware.
A qualified electrician who understands the electrical code in your area should install your Master. The
installation should not require any special tools, but may require extra hardware, wire, etc. as required
by your local electrical code.
Surface Mount
Power Supply Box
Wall Mount Cover
Display Unit
2
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LTRx-512 Installation and User’s Guide
To surface mount the Master
1. Place the Master on its back with the display unit facing up and the keypad to the right
2. Remove the two screws from just above the display unit
3. Lift the display unit up and away from you. Note that two rivets at the bottom of the cover
prevent you from lifting it straight up
4. Unplug the ribbon power cable from the back of the display unit
5. Set the display unit aside
6. Place two wall anchors and #8 screws 10 inches apart and level on the wall where you want
to mount the Master
7. If needed, place two wall anchors 5 inches below the first two screws
8. Hang the power supply onto the top two screws using the keyholes on the back
9. Screw two more #8 screws through the two holes at the bottom of the power supply into
the wall anchors
10. Follow the wiring steps in step 2
11. Reconnect the ribbon cable
12. Replace the display unit using the two screws that you earlier removed
Semi-Flush Mount
You can set the power supply portion of the Master into the wall. See the steps below and refer to
the Surface Mount drawing to semi-flush mount your Master. A competent electrician should mount
the Power Supply Box inside the wall
To semi-flush mount the Master
1. Place the Master on its back with the display unit facing up and the keypad to the right
2. Remove the two screws from just above the display unit
3. Lift the display unit up and away from you. Note that two rivets at the bottom of the cover
prevent you from lifting it straight up
4. Unplug the ribbon power cable from the back of the display unit
5. Set the display unit aside
6. The power supply measures 12" wide x 6" high x 3 3/8" deep. The cover extends ½" around
the 12" x 6" dimensions. Cut a hole roughly 12¼" x 6¼" in the wall between two studs where
you want to hang your Master
7. Cut two blocks of wood for filler and attach them to the studs
8. Using the two holes on each side of the power supply, screw it to the blocks
9. Follow the wiring steps in step 2
10. Plug the ribbon cable
11. Replace the display unit using the two screws that you earlier removed
3
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LTRx-512 Installation and User’s Guide
Lowering the Display Unit during Testing
With a Semi-Flush or Surface mount, you can hang the display unit below the back box when testing
the Master and its circuits. To lower the display unit, remove the two screws that attach the display
unit to the back box. Lift the unit up and away from the back box, leaving the ribbon cable plugged
in. For Semi-Flush mounts, remove the green communications plug from the back of the display
unit, so it can sit flat against the wall. Swing the two hooks on the back of the unit up and hook
them over the bottom edge of the back box. You can use the keypad to turn on circuits or program
the Master, as well as access the relay and connector blocks inside the back box
4
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LTRx-512 Installation and User’s Guide
Rack Mount
The LTR8-512 and LTR8-512M come with two L-shaped brackets (optional on the LTR4-512) so you
can install your Master in a standard 19-inch rack
Power Supply Box
Brackets
Display Unit
To install the Master in a 19-inch rack
1. Place the Master on its back with the display unit facing up and the keypad to the right
2. Remove the two screws from just above the display unit
3. Lift the display unit up and away from you. Note that two rivets at the bottom of the cover
prevent you from lifting it straight up
4. Unplug the ribbon power cable from the back of the display unit
5. Set the display unit aside
6. Detach the display unit from the wall mount cover by removing the 4 screws on the back of
the display unit (IMPORTANT: These screws are the correct length so they do not interfere
with the circuit board inside the display unit. Using any other screws voids any warranty)
7. Remove the rectangular knockout near the top of the power supply
8. Using the 4 screws that you removed from the display unit, attach the display unit to the
side of the power supply. You can fit a #1 Philips screwdriver with an 8 inch blade through
the holes opposite the 4 screw holes
9. Plug the ribbon cable from the power supply into the display unit
5
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LTRx-512 Installation and User’s Guide
10. Remove the two screws from the side of the display unit
11. Using these same screws, attach an “L” bracket (or ear)
12. Repeat to attach the other ear
13. Mount the unit in the rack
14. Follow the wiring steps in the next chapter before attaching the box cover
15. Attach the furnished cover to the power supply using four 6-32 screws (two of these screws
you removed from the display unit)
Hidden Power Supply Mount
You can hide the power supply portion of the Master above a dropped ceiling, under a raised floor
or behind a wall, up to 8 feet away from the display unit. This allows you to hide the cables and
gives a more pleasing look to your Master. To mount the Master this way, you must purchase the
8-foot connection cable
Power Supply Box
Display Unit
8 foot cable
(optional)
To hide the power supply
Place the Master on its back with the display unit facing up and the keypad to the right
Remove the two screws from just above the display unit
Lift the display unit up and away from you. Note that two rivets at the bottom of the cover prevent you
from lifting it straight up
Unplug the ribbon power cable from the back of the display unit
Set the display unit aside
Detach the display unit from the power supply cover by removing the 4 screws on the back of the
display unit (IMPORTANT: These screws are the correct length so they do not interfere with the circuit
board inside the display unit. Using any other screws voids any warranty)
Unplug the ribbon cable from the power supply board
Remove a knockout in the power supply
Pass the end of the 8-foot connection cable with the Ground wire through the opening using proper
strain relief hardware.
Connect the communication cable. When properly installed, the cable will face away from the
transformer
6
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Attach the ground wire to one of the lower power supply mounting screws
Note: UL regulations require that you do NOT place high voltage (120V) and low voltage
communication cables in the same conduit or through the same knockout holes
•
•
Follow the wiring steps in step 2
For the cleanest installation, mount the display unit over a standard “double gang” 4-inch
electrical box
•
•
•
•
Route the other end of the 8-foot connection cable to this electrical box
Place two #8 screws, 12 inches apart and level, ½-inch down from the top of the electrical box
Connect the 8-foot connection cable and any communication cables to the display unit
Check your connections, then turn your Master on using the On/Off switch on the power supply
board
•
Attach the furnished cover to the power supply using four 6-32 screws (two of these screws you
earlier removed from the display unit)
7
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LTRx-512 Installation and User’s Guide
Step 2 – Wiring the Master
Wire the display panel and power relay units for bell control and clock synchronization. Refer to the
diagrams in Appendix C2 for more details. Until you complete this part of the wiring, do not turn on
the AC power to P4, and keep the power/relay unit’s toggle switch turned “OFF”
(Note: The LTR4-512 does not contain Terminal Block P3)
Power Supply – LTR8
TERMINAL BLOCK ‘P4’
WIRING THE LTR8-512 FOR 120VAC
(nom.) OPERATION
TERMINAL BLOCK ‘P4’
WIRING THE LTR8-512 FOR 220/240VAC
(nom.) OPERATION
J1 installed between 3 & 4 and J2
installed between 5 & 6
J1 installed between 4 & 5
8
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LTRx-512 Installation and User’s Guide
Power Supply – LTR4
TERMINAL BLOCK ‘P4’
WIRING THE LTR8-512 FOR 120VAC
(nom.) OPERATION
TERMINAL BLOCK ‘P4’
WIRING THE LTR8-512 FOR 220/240VAC
(nom.) OPERATION
J1 installed between 3 & 4 and J2
installed between 5 & 6
J1 installed between 4 & 5
Your Master is already setup for 120VAC operation. If you need to wire it for
220/240VAC, change the jumper settings as shown in the drawings on page 8.
9
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LTRx-512 Installation and User’s Guide
We recommend using stranded wire inside the Power Supply Box. Stranded wire allows for a firm
connection to the Quick Connect terminals. Stranded wires are also less likely to interfere with the
relay board components. If you must use solid wire, join the stranded wire to the solid wire in another
box
Note that applying 220/240 VAC power to a system not setup for that voltage level can severely
damage its electronic parts
•
•
Attach the supplied quick-connects to the wires as needed
Plug the quick-connects into the terminal block, as shown in the drawings above. Failure to
properly connect the ground wire can increase interference and cause unsafe operating
conditions
•
While the Master is fused internally to protect its electronics, you must also fuse the incoming AC
line as required by your local electrical code. You should connect the unit to a dedicated 10 Amp
circuit. You may need to add external MOV’s or diodes to sync a specific clock type – see Appendix
C1 for the wiring diagram of your type clock. Appendix D shows wiring diagrams for bell circuits and
communications
•
•
Complete any mounting steps in the previous chapter before turning on the power supply
Turn the toggle switch in the power supply to the “ON” position. The display may show the message
SYSTEM RECOVERY IN PROGRESS" for about 2 minutes, then you will see the date and time
•
Fasten the cover to the power supply
EXTERNAL PULSE-SYNC
Your Master can synchronize to other systems if needed. For example, if you have a non-compatible
time clock that the Master cannot synchronize, but it has a built-in bell ringer. By shorting
terminals 7 & 8 on terminal block P1, or terminals 6 & 7 of the communications terminal on the
back of the display unit, the Master will immediately reset to 00:00 (midnight). If you can program
the other device to close its circuit at 00:00 (Midnight) then the two systems will remain reasonably
in sync. WARNING: DO NOT APPLY POWER TO THESE CONNECTIONS – only close the circuit for a
short time (Duration must be at least 1, but not more than 2 seconds)
10
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LTRx-512 Installation and User’s Guide
Step 3 – Setting Up the Master
If you will use the Master to sync clocks, you must first use relays #7 & #8 (terminal block P1) for
synching. If you have an LTR8-512 or LTR8-512M and will use a second clock type, you must use
relays #5 & #6 (terminal block P2) for those clocks
Bell Zone
#1
Bell Zone
#2
Bell Zone
#3
Bell Zone
#4
Bell Zone
#5
Bell Zone
#6
Bell Zone
#7
Bell Zone
#8
Relay #1
Relay #2
Relay #3
Relay #4
Relay #5
Relay #6
Relay #7
Relay #8
---Clock Sync #2---
Here are some suggested ways to program your Master’s relays:
---Clock Sync #1---
•
•
•
Eight (8) bell zones that can last from 1 second to 99 seconds. Use this setup if your
Master will not synchronize secondary clocks (other than DDCx-RS types).
Six (6) bell zones and one electro-mechanical wall clock sync control. Use this setup if
your Master will sync only one type of clock in one string.
Four (4) bell zones and two electro-mechanical wall clock sync controls. Use this setup if
you will synchronize two clock types, or if you have two strings of clocks (typically 20 to
35 clocks to a string).
The steps below lead you through getting the Master up and running.
3A - Enter the Password
The user password allows you to access user functions, but you must use the administrator password to
access advanced functions. You can change the user password, but you cannot change the administrator
password. To keep the administrator functions secure, only give this guide to authorized personnel. All
factory programmed passwords can be spelled out using the letters of a telephone keypad. For
example, the administrator password is 332537 or DEALER. Perform the following keypad entries to
enter the administrator password.
Step
Press
See on Display
PASSWORD
PASSWORD
.
1
2
3
[#][0][#]
[3][3][2][5][3][7]
[#]
000000
332537
ADMINISTRATOR
PASSWORD ACCEPTED
The display will return to the time and date after 3 seconds.
Note that if you stop using the keypad for over 5 minutes, you must re-enter your password
3B - Set the Date and Time
11
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LTRx-512 Installation and User’s Guide
To set the date and time, select Function [1] by keying [#][1][#]
Enter the numbers for the month, date and year (4-digit year), then press [#], such as
[0][4][0][3][2][0][0][3][#] shown below:
ENT.DATE: 04-03-2003
ENTER DAY-OF-WEEK: D
1=SUNDAY..7=SATURDAY
Enter a number [1] - [7] for the day of the week, Sunday through Saturday:
[1]=Sunday
[2]=Monday
[3]=Tuesday
[4]=Wednesday
[5]=Thursday
[6]=Friday
[7]=Saturday
For example, if you press [5], the display shows
ENT.DATE: 04-03-2003
TODAY IS THURSDAY
ENTER TIME: HH:MM
SELECT [0]PM / [1]AM
Press [#] to confirm or [*] to try again
Once you press [#], enter the time of the next upcoming minute, using either 12-hour or 24-hour
format, then press [#]. (If using 24-hour format, enter midnight as 00:00)
For example, if the current time is 08:59, enter:
09:00
ENT.DATE: 04-03-2003
TODAY IS
THURSDAY
ENTER TIME: 09:00
SELECT [0]PM / [1]AM
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If you enter a time less than 13:00 (1:00 PM), then you will see
SELECT [0]PM / [1]AM
Press [0] for PM or [1] for AM. If you choose ‘PM’, then the time will display in 24-hour format to
confirm your entry
ENT.DATE: 04-03-2003
TODAY IS THURSDAY
ENTER TIME: 21:00
PRESS [#] IF CORRECT
Press the [#] key at the top (‘00’ seconds) of the new minute to accept. If the time or date is
incorrect, press [*] to cancel and try again.
The display will now show the time and date you just entered. You can toggle between the 12-hour
and 24-hour display using “Quick Check” command [3]
Make sure you enter the correct date and day, because the schedules you setup depend on the
accuracy of these choices
3C - Enable the Relays
Use Function [6] to enable any control relays that you want to use.
The Enable Circuits function only enables you to use certain relays. It does not turn them on. Use
Function [3] or [4] to actually turn on these relays
Step
Press
[#]
Display
1
2
3
SELECT FUNCTION CODE
[6] =ENABLE CIRCUITS
[6]
[#]
SELECT ACTIVE
BELL ZONES 12345678
CLOCK CKTS
PRESS [#] IF CORRECT
4
5
[1] - [8]
[#]
Enter the circuit numbers that you want to enable
or disable.
When you see all the circuit numbers you want
enabled, press [#]
13
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LTRx-512 Installation and User’s Guide
3D - Choose Clock Types
If you will use the Master to synchronize electro-mechanical wall clocks (analog or digital), then use
Function [2] to choose the clock type for Clock #1 and/or Clock #2, following the instructions below.
Clock Control Codes can be found in Appendix C1.
NOTE: You do not need to enter any special setup to make the Master synchronize Lathem time
sync devices (DDC4R, LTR-0, DWA-S and ATX6) using the Master’s RS-485 SYNC ports
NOTE: The LTR4-512 can only synchronize one type of secondary system
Start this function by pressing [#][2][#]
ENABLE CLOCK CIRCUIT
SELECT CLK1 CODE: NN
[#] FOR CODE LIST
Enter the 2-digit code for CLOCK CIRCUIT 1, then press [#]. If you entered a code other than ‘00’, and
you have a LTR8-512 or LTR8-512M, you will see
ENABLE CLOCK CIRCUIT
SELECT CLK2 CODE: NN
[#] FOR CODE LIST
Enter the code for CLOCK CIRCUIT 2, or [0][0] if you will not use a CLOCK2, then press [#]
PRESS [#] IF CORRECT
Enter [#] to confirm or [*] to cancel and try again.
For future reference, write the programmed Clock Type Codes on the lines, below:
Clock Circuit 1:__________________
Clock Circuit 2: _____________________
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3E - Test Bell Circuits
Manual Bell Control
Use Manual Bell Control Function [3] (described on Pg. 20 to test selected bell circuits. Press [#][3][#]
to start this function
MANUAL BELL CONTROLS
1-2-3-4-5-6-7-8
PRESS AND HOLD [#]
TO EXECUTE. [*]TO END
Auto Test the Bells
Use the Auto Bell Test feature to turn on all bell relays once per minute at the start of each minute.
Once you start this function, you can test the continuity of your bell wiring circuits. Use the “hidden
code” 2355878 [BELLTST] to start the Auto Bell Test. When you enter this code, ignore anything that
displays on the screen
Use Function [6] to disable any relays that you do not want to use in your testing
Once you finish testing, make sure you enter the hidden code again to stop the Auto Bell Test and use
Function [6] to enable any relays that you earlier disabled
3F – Set Daylight Savings
Your Master comes set to adjust for Daylight Savings Time in the United States. If you live outside the
United States or if your region does not observe daylight savings, use Function [7]
(Described on Pg. 26); otherwise, skip to Step 3g.
15
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LTRx-512 Installation and User’s Guide
3G – Setup Communication
The “factory default” communication settings (LTR8-512 and LTR8-512M only) are:
Baud Rate:
Terminal ID#:
9600
065
Use Function [B] (described on Pg. 30) if you if you need to change these settings for MasterLink
configurations involving multiple Masters,
You can setup your LTR8-512 with LTR MasterLink using RS-232 (serial), RS-485 (networked), Modem
(remote), or Ethernet (requires TXTOSER accessory) Communications.
You must enter these same settings for your LTR8-512 in the LTR MasterLink software
Congratulations! You have finished the basic setup of your LTRx-512 Master.
Basic Setup is Complete!
All of the programmed parameters have been stored in the Master’s protected memory and will be
retained in the event of power failure, brown-outs, etc.
The Master will exit itself out of Program Mode once you stop using the keypad for 5 minutes. If you
wish to exit programming mode immediately, to prevent others from accessing the Master Clock, simply
enter an invalid password. (For example)
Press
Display
[#]
[0]
SELECT FUNCTION CODE
[0]=ENTER PASSWORD
[#] 99 [#]
PASSWORD:
000099
16
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LTRx-512 Installation and User’s Guide
Additional Functions:
All of the Master’s functions are described in the next section of this guide. Remaining steps, which
may be performed “as needed” by the Installer or User, include the following:
Function
Number
Programming Operation
Enter Password
Set Date / Time
.
0
1
3
4
5
8
9
A
C
Manual Bell Control (Immediate Activation)
Program Bell Schedules
Program Schedule Change Dates
Change Active Schedule
Synch Clocks (after Wall Clock power failure)
Program Holidays
Change User Password
In particular, most Users will want to execute the following steps:
Enter their User Password (Function [0]),
Program Bell Schedules (Function [4]) and
Make at least one Bell Schedule “Active” (Function [8]).
Users may also want to:
Program Schedule Change Dates (Function [5]) for automating schedule changes
Program Holidays (Function [A]) if bells should not ring on those occasions
Change User Password (Function[C]) to prevent unauthorized tampering
Users who are unfamiliar with the technical specifications of the installation are urged to avoid
accessing functions that require the Administrator Password, as incorrectly reprogramming any of the
configuration parameters (Functions 2, 6, 7, B) could cause the system to function improperly.
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Function Descriptions
[#]
[*]
Starts the Programming Functions and Confirms Entries
Ends Program functions and/or Cancels Entries (except the “Quick Check”)
Quick Check Commands
Quick Check commands display system information for about 2 seconds. You can press any of the three
“corner quick check keys” ([*], [1] or [3]) when the Master is in Clock Mode.
Quick Check Command [*] Status
Any time you see the time and date, you can press [*] to see the Master status. You will see the
firmware version, terminal ID#, communications baud rate, time display format (12-hr or 24-hr),
daylight savings country code and the clock types you have chosen
Quick Check Command [1] Edit Keys
Any time you see the time and date, you can press [1] to see the edit key descriptions. You can use the
edit keys to program Bell Schedules, Automatic Schedule Change Dates, and Holiday Dates. When you
press [1], you will see
[1] EDIT
[3] PRV
[4] DEL
[6] ADD
[9] 1ST
[#] NXT
[*] EXIT
Quick Check Command [3] 12/24 Hour Display
Any time you see the time and date, you can press [3] after entering your password to toggle the time
and date between 12-hour and 24-hour format. The 12-hour format shows AM or PM, while the 24-hour
format shows the day of the week (or ‘HO’ for Holiday).
Program Keys
To access the Master’s programming functions, press the [#] key. As described below, some functions
require a user password, and advanced functions require the administrator password.
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[0] = Password
You must enter a password for most programming functions. To enter your password, press [#][0][#]
Enter your 6-digit password, then press [#]
Once you enter your password, you can now program your Master until it detects that you haven’t
pressed a key for 5 minutes. After that, you must re-enter your password to keep programming
The administrator password 332537 [DEALER] allows you to access advanced functions. Functions that
require the Administrator Password are [2] Select Clock Control, [6] Enable Circuits, [7] Daylight
Savings, and [B] Communications
The default user password is 000000. See Function [C] Change Password to learn how to change your
user password. You cannot change the administrator password
[1] = Set Date and Time
To set the date and time, enter your password (#0#), then [#][1][#]
Enter the numbers for the month, date and year (4-digit year), then press [#], such as
[0][4][0][3][2][0][0][3][#] shown below:
ENT.DATE: 04-03-2003
ENTER DAY-OF-WEEK: D
1=SUNDAY..7=SATURDAY
Enter a number [1] - [7] for the day of the week, Sunday through Saturday:
[1]=Sunday
[2]=Monday
[3]=Tuesday
[4]=Wednesday
[5]=Thursday
[6]=Friday
[7]=Saturday
For example, if you press [5], the display shows
ENT.DATE: 04-03-2003
TODAY IS THURSDAY
ENTER TIME: HH:MM
SELECT [0]PM / [1]AM
Press [#] to confirm or [*] to try again
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Once you press [#], enter the time of the next upcoming minute, using either 12-hour or 24-hour
format, then press [#]. (If using 24-hour format, enter midnight as 00:00)
For example, if the current time is 08:59, enter:
09:00
ENT.DATE: 04-03-2003
TODAY IS
THURSDAY
ENTER TIME: 09:00
SELECT [0]PM / [1]AM
If you enter a time less than 13:00 (1:00 PM), then you will see
SELECT [0]PM / [1]AM
Press [0] for PM or [1] for AM. If you choose ‘PM’, then the time will display in 24-hour format to
confirm your entry
ENT.DATE: 04-03-2003
TODAY IS THURSDAY
ENTER TIME: 21:00
PRESS [#] IF CORRECT
Press the [#] key at the top (‘00’ seconds) of the new minute to accept. If the time or date is not
correct, press [*] to cancel and try again.
The display will now show the time and date you just entered. You can toggle between the 12-hour
and 24-hour display using “Quick Check” command [3]
Make sure you enter the correct date and day, because the schedules you setup depend on these
choices
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[2]=Select Clock Control
This function requires the administrator password
Use this function to choose the make/model of the clocks that your Master will synchronize (Note:
The LTR4-512 can only synchronize one type of secondary system)
Enter your administrator password, then start this function by pressing [#][2][#]
ENABLE CLOCK CIRCUIT
SELECT CLK1 CODE: NN
[#] FOR CODE LIST
Enter the 2-digit code for CLOCK1, then press [#]. If you entered a code other than ‘00’, and you have
a LTR8-512 or LTR8-512M, you will see
ENABLE CLOCK CIRCUIT
SELECT CLK2 CODE: NN
[#] FOR CODE LIST
Enter the code for CLOCK2, or [0][0] if you will not use a CLOCK2, then press [#]
PRESS [#] IF CORRECT
Enter [#] to confirm or [*] to cancel and try again
[3]=Manual Bell Control
This function does not require a password
Use this function to test bell circuits or to sound a bell during an unscheduled time, such as a fire
alarm. Press [#][3][#] to start this function
MANUAL BELL CONTROLS
1-2-3-4-5-6-7-8
PRESS AND HOLD [#]
TO EXECUTE.[*]TO END
The 2nd line of the display only shows the circuit numbers (1-8) that are available for bell controls
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Press [0] to turn them all off, or press keys [1] - [8] to turn a circuit off or on
When you see the circuits that you want to ring, press and hold the [#] key. The front panel lights will
light up to show that you have turned on those relays. Release the [#] key to turn those relays back
off. Note that the relays scheduled to turn ‘on’ will cycle as programmed
You can now sound other circuits, or press [*] to quit
Note: When your CLOCK1 Type is Type 14 (Electronic Coded) or Type 15 (Straight Frequency), you
may need to hold the [#] key for about a minute to energize your bell circuits. You will know that
your circuits have turned on when the green front panel lights for those circuits light up
Auto Bell Test
No password is required for this function
Use the Auto Bell Test feature to turn on all bell relays once per minute at the start of each minute.
Once you start this function, you can test the continuity of your bell wiring circuits. Use the “hidden
code” 2355878 [BELLTST] to start the Auto Bell Test. While entering this code, ignore anything that
displays on the screen
Use Function [6] to disable any relays that you do not want to use in your testing
Once you finish testing, make sure you re-enter the hidden code to stop the Auto Bell Test and use
Function [6] to enable any relays that you earlier disabled
[4]=Program Schedules
Use this function to set bell schedules. A schedule lists the days and times when the bell circuits will
turn on. Your Master can have up to eight (8) different bell schedules with up to sixty-four (64)
‘events’ per schedule. If needed, you can make several schedules active at the same time to increase
the number of events to as many as 512 (8 multiplied by 64). In fact, each ‘event’ can trigger several
‘actions’. For example, you can program a single event to turn on relays #1, #2 and #4 for 7 seconds
at 08:00 AM on Tuesdays, Thursdays and Holidays
Enter your password (#0#), then press [#][4][#] to start programming schedules
SCHEDULE PROGRAMMING
SELECT SCHEDULE # N
Press Schedule Number [1] - [8]. Normally, start with [1]
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The following will show on the display:
For Firmware version 4.05 and earlier:
For Firmware version 4.06 and later:
To select the appropriate mode:
Press [1] DATA ENTRY to create a new schedule
Press [2] DATA SCAN to view a schedule
Press [3] DATA EDIT to change a schedule
Press [4] CLEAR to clear all records in the selected schedule
When you choose [2] DATA SCAN, you can view events. You can use these scan keys:
Scan Key
Description
[9] 1ST Go to the 1st event (in ascending time order)
[3] PRV View the previous event
[#] NXT View the next event
[*] EXIT End and exit
When you choose [3] DATA EDIT, you can view, edit or delete events. You can use the keys
above, plus these edit keys:
Edit Key
Description
[1] EDITEdit the displayed event
[4] DEL Delete the displayed event
[6] ADD Add a new event
When you choose [1]DATA ENTRY, you can create a schedule. Follow the steps below to create a
schedule
SELECTED SCHEDULE # 1
SELECTED MODE = ENTRY
ZONE TYPE = BELL
PRESS [#] TO EXECUTE
Press [#] to accept.
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Then select the days when this event occurs
[0] selects no days, [1]-[7] selects Sunday-Saturday, [8] selects holidays and [9] selects all days
(including holidays). Press these keys to turn days on or off. After you choose the days when the
event will occur, press [#]
Example: Press 1,3,5,7,8 to turn off all days except Monday, Wednesday and Friday
SELECT DAYS: S M T W T F S H
2
4
6
Select which circuits will turn on for this event
Example: Press 1,2,3,4, to turn on circuits 1, 2, 3 and 4
ACTIVE DAYS: M W F
SELECT CKTS: 1234
Enter the event start time in 12-hour or 24-hour format. If you enter a time earlier than 13:00 (1:00
PM), then press [1] to change PM to AM
ACTIVE DAYS: M W F
SELECT CKTS: 1234
ENTER START: HH:MM
P
The menu will ask for the bell length (SECONDS ON)
Enter how many seconds this event lasts. The bell length shows 3 seconds (or 5 seconds if your
CLOCK1 is Type 15). To accept, press [#], or enter another value from 01-99 seconds, then press [#]
ACTIVE DAYS: M W F
SELECT CKTS:1234
START TIME : 08:00 A
SECONDS ON :
03
Your Master saves these values in the schedule then displays SELECT DAYS again, waiting for you to
enter another event. Once you finish entering events, you can quit by pressing [*]
Make sure you use Function 5 or Function 8 to activate your schedules
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[5]=Schedule Changes (Use the handy programming charts included at the end of this Guide)
If you wish to activate schedules at a future date, use Schedule Changes to program a schedule’s start
date and time. This function works much like the Bell Schedule Function [4]. Enter your password
(#0#), then press [#][5][#]
To select the appropriate mode:
Press [1] DATA ENTRY to create a new schedule
Press [2] DATA SCAN to view a schedule
Press [3] DATA EDIT to change a schedule
Press [4] CLEAR to clear all records in the selected schedule
The following will show on the display:
For Firmware version 4.05 and earlier:
For Firmware version 4.06 and later:
After making your choice, you will see
PROG.SCHEDULE CHANGE
EFF. DATE : 00-00-00
EFF. TIME : 00:00
NEW SCHEDS:
Enter the date and time, then press the schedule number (1-8) for each schedule to activate at that
date and time. You do not need to press [#] after you enter each value - only press [#] after
entering the last New Schedule on line 4.
After you enter each change, the menu gives you the chance to enter, scan or edit another one. Or
press [*] to quit.
The Master will hold up to 16 programmed changes. Once your change occurs, your Master clears it
from memory, making room for you to enter more changes.
Note: Only the schedules entered in this function will activate at the Date and Time entered. Any
schedules previously active will become inactive if not on the list of new schedules.
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[6]=Enable or Disable Circuits
This function requires the administrator password.
Use this function to Enable and Disable your Master’s control relays during circuit wiring or
maintenance. This function can also ‘hold back’ clocks to manually adjust for daylight savings in the
fall if you have chosen not to use Function 7 “Daylight Savings”.
[7]=Daylight Savings
This function requires the administrator password.
Your LTRx-512 knows the daylight savings time (DST) settings for over 75 countries. By using the 2-
digit “country code”, your LTRx-512 will automatically adjust for daylight savings time.
Step
1
Press
[#][7][#]
See on Display
ENTER COUNTRY CODE
.
FOR DAYLIGHT SAVINGS TIME ADJUSTMENT:
Return to time and date display
2
3
Enter new Code
[#]
If you own the LTR8-512 or LTR8-512M and if your nation does not appear in the Country Code list or
if the dates for Daylight Savings in your country have changed, you can choose code ‘00’ and use the
optional LTR MasterLink software to program when the clock adjustments should occur.
[8]=Change Active Schedule
Use this function to run a schedule that you setup in function [4]=PROGRAM SCHEDULE. Enter your
password (#0#), then press [#][8][#] to change a schedule. You will see a display similar to the
following:
ACTIVATE SCHEDULE(S)
ACTIVE NOW: 12 5
ACTIVE NEW:
In this example, the display shows that Schedules #1, #2 and #5 are all active now. You can think of
this as 3 schedules of up to 64 events used together to make 1 large schedule of up to 192 events
Press [1] - [8] to select the schedules you wish activated immediately. The [0] key turns all schedules
off. When the ACTIVE NEW line shows the schedules that you want active, press [#]. Be sure that all
schedules that you want active show on this line, even if they were already active.
You will see
PRESS [#] TO EXECUTE
Press [#] again, and your choices on ACTIVE NEW will activate now. Or, press [*] to cancel without
making any changes
Schedules that you make active here will stay active until you change them again or until the Date
and Time of the next Schedule Change [5] is to occur.
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[9]=Sync Clocks
Use this function to quickly sync any secondary clocks that lose time. This can occur if power to your
LTRx-512 stayed on while power to the secondary clocks stopped.
Note: This function is primarily used during initial installation of the secondary system, if there has
been maintenance of the system requiring the power to be turned off, or other special
circumstance. The Master Clock should keep your secondary clocks on time based on the type and
style of correction the system is using.
Enter your password (#0#), then press [#][9][#]. You will see a display similar to the following:
Note: CLK[2] appears on the LTR8-512 and LTR8-512M only
SELECT SYNCH CLOCKS
CLK[1] &/OR CLK[2]
Since only one of the clock circuits may have lost power, you can choose to re-sync CLOCK1, CLOCK2
or both.
Press [1] to turn on or off this display:
ADVANCE CLK1
Press [2] to turn on or off this display (you will see this option only if your clock is setup for 2
Clock Systems.):
ADVANCE CLK2
After choosing which clock circuits to sync, press [#].
If your clocks are synchronous types (01, 03, 06, 18, 19 & 22), they can only advance to the start of
the nearest hour and will then wait for the Master Clock to catch up. If your clocks are impulse types,
then you will see
Enter the time shown on the secondary clocks that have lost time and then press [#]. You will see
PRESS [#] TO EXECUTE
To sync the secondary clocks, press [#], or press [*] to cancel. Your impulse clocks will advance to
your LTRx-512’s time
NOTES:
1. The Clock Sync function does not support Clock Types 14, 15 or 24
2. When a Power-On Clock Recovery or user-initiated clock sync occurs, your LTRx-512 will not
accept other commands to start clock synchronization
3. You can cancel Power-On Clock Recovery or user-initiated clock synchronization by choosing Clock
Types again through function [2]=SELECT CLOCK CTL.
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[A]=Program Holidays
You can enter up to 16 dates as holidays in your LTRx-512. During holidays, only the events that you
set to occur on holidays will turn on when they reach the scheduled time.
Examples:
1) Select SmtwtfSH for an event to occur on Sunday, Saturday, or any day setup as a
Holiday, even if the holiday is other than Sunday or Saturday
2) Select sMTWTFsh for an event to occur Monday through Friday, unless the day is a
holiday
3) Select SMTWTFSH for an event to occur every day, even on holidays
You cannot choose function [A] directly. To start the Program Holidays function, enter your password
(#0#), then press [#][9][0][#]
HOLIDAY PROGRAMMING
SELECT [1]DATA ENTRY
[2]DATA SCAN
[3]DATA EDIT
Use [1] to enter new holidays, [2] to view holidays and [3] to change or delete holidays
If you choose [1], you will see
Use keys [1] - [9] to enter a holiday in MM-DD-YY format, then press [#] to accept, or [*] to cancel
HOLIDAY PROGRAMMING
SELECTION MODE=ENTRY
SELECT DATE ??-??-??
The menu will now ask for another holiday. You can do so or press [*] to finish
Once your holiday occurs, your Master clears it from memory, making room for you to enter more
holidays
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[B]=Communications (LTR8-512 and LTR8-512M Only)
This function requires the administrator password
Use this function if you use LTR MasterLink or Terminal Manager software with your LTR8-512
You cannot choose function [B] directly. To enter Communications, press [#][9][0][0][#]
Use this function to enter the data transmission speed and terminal ID#
You must enter these same settings for your LTR8-512 in the LTR MasterLink software
You can see your terminal ID# and baud rate by using the “Quick Check” command [*] when the LTR8-
512 is in Clock Mode
[C]=Change Password
Use this function to change the default user password (000000) to a unique 6-digit number to prevent
unauthorized access to the LTRx-512’s programming functions. You should keep a copy of this
password in a safe place
You cannot choose function [C] directly. To start the Change Password function, enter your current
password, then press [#][9][0][0][0][#]
NEW PASSWORD 000000
To keep your old password, press [*] to cancel
To change the password, enter a 6-digit number, then press [#]. You will see
PRESS [#] IF CORRECT
Press [#] to accept, or press [*] to cancel and try again
Once you change your password, your LTRx-512 will no longer accept the old password
You can always change your password again if needed
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Daylight Savings Codes
APPENDIX A - SPECIFICATIONS
ELECTRICAL:
Input Voltage
Input Power
Memory / Quartz Time Backup 10 year (nom.) Lithium Battery
120 or 220 / 240 VAC @ 60Hz or 50Hz
50 VA max (less than 0.5A @ 120V)
Bell / Clock Control Relays
Fuse
120VAC / 28VDC, 10A , Pluggable
1 x 1.0 Amp Main (AGC1)
MECHANICAL / ENVIRONMENTAL:
Operating Temperature
Weight
32°-115° F (0°-46° C)
About 12 lb. (depending on configuration)
See configuration drawings
Dimensions
Mounting Options
Semi-Flush, Surface, 19" Rack, Hidden Power Supply
(some configurations optional)
FUNCTIONAL:
Secondary Clocks Supported
Any two (2) of twenty-four (24) types plus Lathem
DDC4R synchronization built-in; See Appendix B.
One (1) of twenty-four (24) types plus Lathem DDC4R
synchronization built-in; on the LTR4-512
Bell Zones and Schedules
Daylight Savings Time
Up to eight (8) zones [less two (2) for each electro-
mechanical secondary clock type]. {Up to four (4) zones
on the LTR4-512.}
Eight (8) Schedules, each allowing sixty-four (64) multi-
function events.
Supports DST standards for over 75 countries. See
Appendix B.
COMMUNICATIONS: (LTR8-512 and LTR8-512M)
Remote Communications with
Lathem LTR MasterLink, Terminal
Manager and “Atomic Clock”
RS-232 point-to-point @ 2400/9600 Baud
RS-485 multi-drop network
Internal modem (option) dial-in / dial-out
Clock / Master Synchronization
using DDC4R Protocols
or Midnight Impulse
RS-485 Sync-In/Out Port @ 9600 Baud
RS-485 Sync-Out Port @ 9600 Baud
Dry-contact input
REGULATORY:
Certifications / Registrations
FCC Part15-ClassB, UL, cUL
FCC Part 68 / Canada ICES-003 - Class B
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Daylight Savings Codes
APPENDIX B – DAYLIGHT SAVINGS COUNTRY CODES
ALBANIA
ANDORRA
ARMENIA
AUSTRIA
AZERBJAN
AZORES
BAHAMAS
BALEARIC ISLANDS
BELARUS
02
02
02
02
02
02
08
02
02
02
08
02
13
02
08
01
12
02
06
02
02
02
02
09
ENGLAND
ESTONIA
FALKLAND ISLANDS
FINLAND
01
02
10
02
02
02
02
02
07
07
02
02
03
02
04
02
08
05
02
02
02
02
02
02
MALTA
MONACO
NETHERLANDS
NEW ZEALAND
NORWAY
POLAND
PORTUGAL
ROMANIA
02
02
02
11
02
02
02
02
02
02
02
02
02
02
02
02
03
02
02
02
08
02
02
FRANCE
GERMANY
GIBRALTER
GREECE
GREENLAND
HAITI
HUNGARY
IRAN
IRAQ
IRELAND
ISRAEL
ITALY
JAMAICA
JORDAN
KAZAKHSTAN
KURGYZSTAN
LATVIA
LEBANON
LIECHTENSTEIN
LUXUMBOURG
RUSSIA
BELGIUM
SAN MARINO
SCOTLAND
SLOVAKIA
SLOVENIA
SPAIN
SWEDEN
SWITZERLAND
SYRIA
TURKEY
UKRAINE
BERMUDA
BOSNIA/HERCGVENA
BRAZIL
BULGARIA
CANADA
CHANNEL ISLANDS
CHILE
CROATIA
CUBA
CYPRUS
CZECH REP
DENMARK
EASTER ISLAND
EGYPT
UNITED KINGDOM
UNITED STATES
VATICAN CITY
YUGOSLAVIA FED.
USER-SPEC. DATES
00
UNDEFINED
14
01 Last Sunday in March, 3rd Sunday in October
02 Last Sunday in March, last Sunday in September
02 Last Sunday in March, last Sunday in September
03 First day of April, Last day of September
04 First Friday in April, First Sunday in September
05 First Friday in April, third Friday in September
06 First Sunday in April, First Saturday in October
07 First Sunday in April, Last Sunday in October
08 Second Sunday in March, First Sunday in November
09 First day of May, Last day of September
10 Second Sunday in September, Third Sunday of March
11 First Sunday of October, Third Sunday of March
12 Second Sunday of October, Second Saturday of February
13 Third Sunday of October, Second Sunday of February
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Secondary Clock Types
APPENDIX C1 - SECONDARY CLOCK TYPE CODES
Type Description
SYNCHRONOUS WIRED
Page
Type Description
Page
03
STANDARD EL SYNCH
AMR T&S X55BHGA801
36
35
37
37
38
38
38
38
37
38
38
39
40
40
41
41
43
43
44
44
44
44
45
45
46
46
46
47
48
01
01
01
01
01
01
01
01
01
01
01
01
02
02
02
02
02
02
02
02
02
02
02
02
02
02
02
33
33
33
33
33
33
33
33
33
33
33
33
34
34
34
34
34
34
34
34
34
34
34
34
34
34
34
34
34
03
04
05
06
06
06
06
07
08
09
10
11
12
14
15
16
17
18
18
19
19
20
21
22
23
23
23
24
LATHEM TYPE SS
CINCINNATI D10
IBM 77 SERIES
STANDARD TM AR-2A
3W MIN IMPULSE/58
SYNCHRONOUS WIRED
CINCINNATI D8
SIMPLEX 77 SER
SIMPLEX 93-9
FARADAY
SIMPLEX 91-9
HONEYWELL ST402A
DUKANE 24F200 DIG
RAULAND 2410 DIG
SIMPLEX 2 MTR /59
SIMPLEX 2 MTR /45
EDWARDS DUAL MOTR
CINCINNATI D6
SIMPLEX 941-9
SIMPLEX 943-9
SIMPLEX 6310-9231
STANDARD EL D10,D12
STROMBERG 3000
3W MIN IMPULSE/59
LATHEM ISC 3W
CINCINNATI D2-D4
DUKANE 24 SERIES
EDWARDS IMPULSE
FARADAY IMPULSE
IBM 75 SERIES
ELECTRONIC CODED
STRAIGHT FREQ.
IMPLS 12HR COR/59
STANDARD TM AR2/3
NATNL SYNC WIRED
DUKANE 240 SERIES
STMBRG SYN WIR/56
LATHEM SS MODIF.
3W MIN IMPULSE/44
CINCINNATI D1
SIMPLEX 74 SER
SIMPLEX 91-4
SIMPLEX 93-4
SIMPLEX 941-4
SIMPLEX 943-4
DUKANE SYNC WIRED
CONDOR 2412 DIG
RAULAND 2422 DIG
CONDOR BAR-AC-4412
EDWARDS SYNC E-1
SIMPLEX 6310-9075
SIMPLEX 6310-9321
STANDARD IMPULSE
02 STROMBERG IMPULS
02
02
LATHEM ISC 2W
CINCINNATID34......................................2.5......S.P..E.C..I.A..L..T.E..S.T.........................N../..A.34
27 SIMPLEX 2310 DUAL MT 39
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Wiring Diagrams
APPENDIX C2 - WIRING SECONDARY CLOCKS
TYPE 01 -
SYNCHRONOUS WIRED
TYPES INCLUDE:Lathem Type SS Wall Clocks
Cincinnati
IBM
D10 (115VAC), D12 (24VAC)
77 Series
Simplex77 Series, 93-9, 91-9, 941-9, 943-9, 6310-9231
Stromberg 3000
All circuits should be fused or protected by a circuit breaker (10Amp maximum)
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Wiring Diagrams
TYPE 02 -
THREE WIRE MINUTE IMPULSE (59TH MIN.)
TYPES INCLUDE:Lathem Type ISC (3-Wire)
Cincinnati
Edwards
Faraday
IBM
D2, D4
Impulse
Impulse
75 Series
Simplex74 Series, 91-4, 93-4, 941-4, 943-4, 6310-9075, 6310-9231
Standard
Stromberg
Impulse
Impulse
All circuits should be fused or protected by a circuit breaker (10Amp maximum)
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Wiring Diagrams
TYPE 02 -
TWO WIRE REVERSE POLARITY MINUTE IMPULSE (59TH MIN.)
TYPES INCLUDE:Lathem Type ISC (2-Wire)
Cincinnati
D3
Using PS8-2412 Power Supply:
Using PS8-24 Power Supply:
* Green and Black Wires in Clock Cable are unused.
All circuits should be fused or protected by a circuit breaker (10Amp maximum)
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Wiring Diagrams
TYPE 03 -
STANDARD ELECTRIC SYNCHRONOUS (*Old Style: Dual Motor)
AMERICAN TIME & SIGNAL #X55BHGA801
All circuits should be fused or protected by a circuit breaker (10Amp maximum)
Note: For New Style (Motor+Solenoid), see Type 06 (Faraday)
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Wiring Diagrams
TYPE 04 -
STANDARD ELECTRIC TIME AR-2A TWO WIRE DUAL VOLTAGE
All circuits should be fused or protected by a circuit breaker (10Amp maximum)
TYPE 05 -
THREE WIRE MINUTE IMPULSE (58TH MIN.)
All circuits should be fused or protected by a circuit breaker (10Amp maximum)
37
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SYNCHRONOUS WIRED
Wiring Diagrams
TYPE 06 -
TYPES INCLUDE:Cincinnati
Faraday(New Style: Motor + Solenoid)
Honeywell ST402A
D8
All circuits should be fused or protected by a circuit breaker (10Amp maximum)
TYPE 07 -
DUKANE 24F200 DIGITAL CLOCKS
NOTE: THIS SELECTION IS NOT SUPPORTED ON THE LATHEM LTR8-512 OR
LTR4-512 SERIES. CORRECTION FOR DUKANE 24F200 DIGITAL CLOCKS IS
AVAILABLE ON THE DUKANE 24A715 SERIES MASTER CONTROL WITH
SOLID-STATE RELAYS. CONTACT DUKANE CORPORATION OR YOUR
DUKANE VENDOR.
All circuits should be fused or protected by a circuit breaker (10Amp maximum)
TYPE 08 -
RAULAND 2410 DIGITAL CLOCKS (24VAC and 115VAC)
38
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Wiring Diagrams
115VAC TYPE
All circuits should be fused or protected by a circuit breaker (10Amp maximum)
24VAC TYPE
All circuits should be fused or protected by a circuit breaker (10Amp maximum)
TYPE 09 -
TYPE 10 -
TYPE 27 -
SIMPLEX 59TH MINUTE DUAL MOTOR
SIMPLEX 45TH MINUTE DUAL MOTOR
SIMPLEX 2310 DUAL MOTOR
Same hourly corrections as Type 09, but with addition of 12-hour corrections, as for Type 03.
All circuits should be fused or protected by a circuit breaker (10Amp maximum)
39
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EDWARDS DUAL MOTOR
Wiring Diagrams
TYPE 11 -
All circuits should be fused or protected by a circuit breaker (10Amp maximum)
TYPE 12 -
CINCINNATI ‘D6’ CLOCKS
All circuits should be fused or protected by a circuit breaker (10Amp maximum)
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ELECTRONIC CODED CLOCKS
Wiring Diagrams
Type 14 -
Clocks run normally with 120 VAC power. For any bells or clock correction, the generator prestart relay (SK1)
first turns on for the signal-generator to reach frequency. SK1 turns on at the 00 second after a programmed
time or manual bell time. Then relay SK2 turns on for 3 seconds, from the 10th to the 13th second, to apply the
generator signal (coded cup start signal) onto the 120 VAC. Bell circuits then turn on for 3 seconds, in the
order listed below, applying the generator signal onto the 120 VAC for decoding by the coded cups. The bell
relay contacts must connect in parallel with the normally open contacts of relay SK2. If it is not time for a
clock correction signal, then SK1 turns off at the 59th second. At the 57th minute of each hour, SK2 turns on
from 57:54 to 58:02, applying the 8-second hourly correction generator signal onto the 120 VAC. At 5:57 AM
and 5:57 PM (12-hr correction), SK2 turns on from 5:57:54 to 5:57:08, applying a 14-second 12-hour correction
generator signal onto the 120 VAC. For daylight savings, the clocks advance to the proper time by normal 12-
hour correction, not at 2:00 AM. The order of each relay operation is listed below (see NOTE for Type 15 re:
SK1):
RELAY
FROM
TO
FROM
TO
SK1 Gen. Prestart (hourly corr.)
H:57:00
H:57:10
H:59:00
H:58:02
SK2 Start Signal
(hourly corr.)
H:57:13
H:57:54
SK1 Gen. Prestart (12-hour corr.)
SK2 Start Signal (12 hour corr.)
H:57:00
5:57:10
H:59:00
5:58:08
5:57:13
5:57:54
SK1 Gen. Prestart (bells)
H:MM:00
H:MM:10
H:MM:59
H:MM:13
SK2 Start Signal
(bells)
Bell Circuit 6
Bell Circuit 5
Bell Circuit 4
Bell Circuit 3
Bell Circuit 2
Bell Circuit 1
H:MM:20
H:MM:25
H:MM:30
H:MM:35
H:MM:40
H:MM:45
H:MM:23
H:MM:28
H:MM:33
H:MM:38
H:MM:43
H:MM:48
Bells should not be scheduled for:
HH:58:SS
For Masters including firmware versions prior
to V2.17 only:
NOTE: The LTRx-512 was designed for clocks
that do not require a generator pre-start to set
the frequency level. Clocks using this pre-start
may not work with the LTRx-512 older than
V2.17
All circuits should be fused or protected by a circuit breaker (10Amp maximum)
TYPE 15 -
STRAIGHT FREQUENCY
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Wiring Diagrams
Clock correction and bell circuit operations are generated by sequentially applying various frequencies onto
the 120 VAC. Each bell and clock correction circuit has its own frequency. Each bell and clock correction
circuit has a receiver circuit that applies the associated bell or clock frequency (3510 Hz normally used for
clock signals). For daylight savings, the clocks advance to the proper time by normal 12-hour correction, not
at 2:00 AM. The time sequence of applying the frequencies to the 120 VAC is shown below, and the Master’s
bell and system relays control these frequencies:
RELAY
FROM
TO
Bell Ckt. 1
Bell Ckt. 2
Bell Ckt. 3
Bell Ckt. 4
Bell Ckt. 5
Bell Ckt. 6
H:MM:00
H:MM:05
H:MM:10
H:MM:15
H:MM:20
H:MM:25
H:MM:05
H:MM:10
H:MM:15
H:MM:20
H:MM:25
H:MM:30
Bells should not be
scheduled for:
HH:58:SS
or
00:00:SS
SK2
SK1
(Hourly Correction)
(12-Hour Correction) 5:57:54 5:58:08
H:57:54
H:58:02
(Hourly Correction &
12-HourCorrection)
(Bells)
H:57:00
H:59:00
30 sec of
Bell time
35 sec of min
previous to
Bell
NOTE: Bells must be programmed 1 minute ahead of desired time.
Bells will not work during manual clock corrections and at the 58th minute.
For Masters including firmware versions
prior to V2.17 only:
NOTE: The LTRx-512 was designed to
work with clocks that do not require a
generator pre-start to set the frequency
level. Clocks using this pre-start may not
work with the LTRx-512 firmware older
than V2.17.
All circuits should be fused or protected by a
circuit breaker (10Amp maximum
)
42
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Wiring Diagrams
TYPE 16 -
THREE WIRE MINUTE IMPULSE (59 MIN)
WITH 12-HOUR CORRECTION
TYPES INCLUDE:Simplex91 and 941
SAME WIRING AS FOR TYPE 02 (3-WIRE)
TYPE 16 -
TWO WIRE REVERSE POLARITY MINUTE IMPULSE (59 MIN)
WITH 12-HOUR CORRECTION
SAME WIRING AS FOR TYPE 02 (2-WIRE)
__________________________________________________________________________________
TYPE 17 -
STANDARD ELECTRIC TIME AR-2 TWO WIRE DUAL VOLTAGE
24 V
All circuits should be fused or protected by a circuit breaker (10Amp maximum)
TYPE 17 -
STANDARD ELECTRIC TIME AR-3 THREE-WIRE IMPULSE
All circuits should be fused or protected by a circuit breaker (10Amp maximum)
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NATIONAL SYNCHRONOUS WIRED
Wiring Diagrams
TYPE 18 -
TYPES INCLUDE:Dukane 240 Series
Rauland
2463 Series
All circuits should be fused or protected by a circuit breaker (10Amp maximum)
TYPE 19 -
STROMBERG SYNCHRONOUS WIRED
TYPES INCLUDE:Stromberg
Synchronous
Lathem Type SS Wall Clocks (modified)
NOTE:
Lathem type SS wall clocks can run according to the above signal operation if modified to
reference the minute and second hands to HH:57:16 (versus HH:59:00) and the hour hand to 12
o'clock versus 6 o'clock.
All circuits should be fused or protected by a circuit breaker (10Amp maximum)
44
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THREE WIRE MINUTE IMPULSE (44TH MIN.)
Wiring Diagrams
TYPE 20 -
All circuits should be fused or protected by a circuit breaker (10Amp maximum)
TYPE 21 -
CINCINNATI ‘D1’
All circuits should be fused or protected by a circuit breaker (10Amp maximum)
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DUKANE SYNCHRONOUS WIRED
Wiring Diagrams
TYPE 22 -
All circuits should be fused or protected by a circuit breaker (10Amp maximum)
TYPE 23 -
CONDOR DIGITAL CLOCKS (Model 2412)
TYPES INCLUDE:Condor 2412
If the digital clocks lose sync with the LTRx-512, then you can use function [9]=SYNC CLOCKS to re-sync them.
All circuits should be fused or protected by a circuit breaker (10Amp maximum)
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RAULAND DIGITAL CLOCKS (Model 2422)
TYPES INCLUDE:Rauland 2422
Wiring Diagrams
TYPE 23 -
If the digital clocks lose sync with the LTRx-512, then you can use function [9]=SYNC CLOCKS to re-sync them.
All circuits should be fused or protected by a circuit breaker (10Amp maximum)
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CONDOR DIGITAL CLOCKS (BAR-AC-4412)
Wiring Diagrams
TYPE 23 -
If the digital clocks lose sync with the LTRx-512, then you can use function [9]=SYNC CLOCKS to re-sync them.
All circuits should be fused or protected by a circuit breaker (10Amp maximum)
48
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Wiring Diagrams
TYPE 24 -
EDWARDS SYNCHRONOUS WIRED CLOCKS - TYPE E1
All circuits should be fused or protected by a circuit breaker (10Amp maximum)
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APPENDIX D - WIRING DIAGRAMS: POWER, BELLS, ETC.
Wiring Diagrams
Fig. D1 - TERMINAL BLOCK ‘P4’
WIRING THE LTRx-512 FOR 120VAC (nom.) OPERATION
All circuits should be fused or protected by a circuit breaker (10Amp maximum)
WIRING THE LTRx-512 FOR 220/240VAC (nom.) OPERATION
All circuits should be fused or protected by a circuit breaker (10Amp maximum)
50
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Wiring Diagrams
Fig. D2 - TYPICAL SIGNAL DEVICE WIRING
All circuits should be fused or protected by a circuit breaker (10Amp maximum)
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Wiring Diagrams
Fig. D3 - COMPUTER CABLE
(For Front Access Port)
(LTR8-512 and LTR8-512M Only)
Fig. D4 - RS-232 CABLE
(for permanent connection to the
Communications Terminal Block)
(LTR8-512 and LTR8-512M Only)
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Wiring Diagrams
Fig. D5 - SYNCHING UP TO 60 RS-485 TIME SYNC DEVICES
WITHOUT A BUFFER
RS-485
DSD
+ -
RS-485
DSD
+ -
RS-485
DSD
+ -
RS-485
DSD
+ -
RS-485
DSD
+ -
RS-485
DSD
+ -
1
2
3
4
5
6
7
8
9
10 11 12 13
Ports are located on the
back of the Display Unit
G
N
D
D
+
G
N
D
S
Y
N
C
TxD
RxD
D
-
D
-
SYNC
OUT
D
+
SYNC
IN
D
-
~~
D
+
~
12V~
AC
OUT
250ma
MODEM
RS-232
RS-485
PULSE
SYNC
HOST COMMUNICATIONS
LTR8-512 & LTR8-512M Only
RS-485
DATA SYNC
Notes: Up to 30 RS-485 Data Sync Devices (DSDs) can be connected to the Data Sync port. Since the SYNC
IN port can send as well as receive, 30 extra devices can be connected. If more than 60 DSDs are
to be connected, another Master Clock will have to be used as a “Booster”.
Fig. D6 - LTRx-512 USED AS SLAVE TO ALLOW 30 EXTRA RS-485
TIME SYNC DEVICES
RS-485
DSD
+ -
RS-485
DSD
+ -
RS-485
DSD
+ -
RS-485
DSD
+ -
MASTER
CLOCK
+ -
RS-485
DSD
+ -
1
2
3
4
5
6
7
8
9
10 11 12 13
Ports are located on the
back of the Display Unit
G
N
D
G
N
D
S
Y
N
C
D
+
D
-
TxD
RxD
D
-
SYNC
OUT
D
+
SYNC
IN
D
-
~
D
+
~
12V~
AC
OUT
250ma
MODEM
RS-232
RS-485
PULSE
SYNC
HOST COMMUNICATIONS
LTR8-512 & LTR8-512M Only
RS-485
DATA SYNC
Note: Since the Sync In port can send as well as receive, 30 extra devices can connect here. If you
already have a Master Source, such as an LTR-0, connect it and its string of clocks to the Sync In
port, for a total of up to 60 devices.
53
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Wiring Diagrams
Fig. D7 – COMMUNICATION TERMINAL BLOCK
Rear of Display Unit
NOTES:
1. Twisted-pair (Cat-3/Cat-5) wire connects directly to Terminal Block; up to 2 wires per position
2. Pulse-sync input is same as provided in power supply. One (1) second (min.) dry-contact switch closure
across terminals causes Master to reset time to 12:00AM of nearest date
3. Grounds (GND) are “signal grounds”, not “chassis grounds”
4. Load on non-regulated 12VAC output must be less than 250mA
5. For DDC4R communications, the LTRx-512 automatically sets itself as a master or slave
Strain Relief for the Communications Cable
•
Using the two wire tie wraps included in the
installation kit, attach them to the terminal block
as shown in this sample to provide strain relief to
the communications cable. Use any two empty
positions.
Use the six (6) connections as follows:
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Wiring Diagrams
RS-485 Sync Time Device Connection
•
Sync In: Terminal block pair used to receive RS-485 synchronization from another Lathem Master product
or radio sync device, or transmit the LTRx-512’s own sync commands to up to 31 RS-485 devices, including
Lathem Masters and DDC4R Wall Clocks
•
Sync Out: Terminal block pair used to buffer and repeat a received RS-485 sync signal, or transmit the
LTRx-512’s own synchronization commands to up to an additional 31 RS-485 devices
Note: When first powered on, the LTRx-512 will “listen” to the Sync-In line to determine if it should be a
“Master” or a “Slave”. If it does not receive a time update for 15 minutes, it will assume it is a “Master”
and start transmitting the time signal on the RS485 Synchronization line, every minute. It will re-
evaluate it’s Master/Slave status every day at 00:00 Hours. When setting up the Master/Slave system,
make sure that you power on the “Master” first and connect the other LTRx-512 to the Sync-Out port on
that clock.
Host Communications
•
•
•
RS-232: Three terminal block contacts for RS-232 communications with an IBM-compatible computer
running LTR MasterLink software for easy system setup
RS-485: Terminal block pair for RS-485 communications with an IBM-compatible computer running LTR
MasterLink software and SWIFT (RS485-RS232 converter)
Modem: Modular connector for modem use. You can use the optional internal modem to dial out to the
“Atomic Clock” at Ft. Collins, CO, or for a remote site using the LTR MasterLink and Terminal Manager
software
12 Volt AC Out
•
A non-regulated 12 Volt 250ma power source. This circuit is not fused seperately and attaching devices
with a higher current load may damage the Master Clock.
Mounting the Master with Hidden Power Supply
•
Using the optional eight (8) foot Connection Cable, you can mount the Display Unit semi-flush on the wall
and place the Power Supply Box in the ceiling, floor or behind a wall. When attaching this cable, remove
the standard short cable and connect the 8 foot cable to the power supply board with the cable moving
away from the circuit board. Connect the other end to the back of the Display Unit using the ribbon cable
connector. The cable should lead towards the bottom of the Display Unit. Attach the strain releif cable
clamps at each end.
55
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Wiring Diagrams
Fig. D8 - POWER SUPPLY TERMINAL BLOCKS
NOTES:
1. Circuits CKT1...CKT4 designate bell controls. Circuit pairs CKT5/CKT6 and CKT7/CKT8 can function as
clock synchronization circuits or as bell controls
(Note: CKT1…CKT4 do not exist on the LTR4-512. Instead use CKT5…CKT8 which are indicated related to
the LEDs on the Display Unit numbered 1-4).
2. MOV’s (Metal-Oxide Varistors) protect all relay contacts
3. Voltage-select jumpers connect to terminal block P4 for 120VAC operation. Users who need to run at
220/240VAC must remove the 120V jumpers and install one jumper wire for the 240V selection. The
system will automatically adjust for operation at 60Hz or 50Hz at either voltage
4. Some clock setups may require external diodes or MOV’s. See the wiring diagram for your type clock
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APPENDIX E – INSTALL THE OPTIONAL MODEM
Installing the Modem
Installation of the optional internal modem should be performed by a trained and competent electronics
technician. Follow these steps;
1. Turn off the power to the Master Clock. You can either access the on/off switch inside the Power
Supply Box or turn off the power at the source.
2. Remove the four (4) screws from the sides of the Display Unit.
3. Gently remove the cover of the Display Unit. Some adhesive may hold the cover to the display and
keypad. A gentle pull should have the cover pull free.
4. Locate the large rectangular hole in the circuit board just to the right of the display.
5. Carefully insert the modem into the sockets on each side of the opening. The modem goes in with the
transformer on the modem board at the top of the board.
6. Replace the cover and secure it with the four (4) screws.
7. Connect a working ANALOG telephone line to the telephone jack on the back of the display unit.
8. Replace the Master Clock to its original position and restore power.
9. Setup the Communications on the Master Clock. Press [#][9][0][0][#] and ensure that the baud rate is
at 9600 and verify the ID# of this Master Clock.
10. Setup your LTR MasterLink software to communicate with a modem clock and test the connection.
1
3
2
4
7
#
5
8
0
6
9
*
MODEM
Installed
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LTRx-512 Installation and User’s Guide
Connecting the LTR-GPS Satellite Receiver/Synchronizer
APPENDIX F – Connecting the LTR-GPS Satellite Receiver / Synchronizer
Lathem’s LTR-GPS is a Global Positioning Satellite receiver using 12-channels to access the accurate date and
time signal transmitted each second by 24 satellites in geosynchronous orbit around the globe.
The package includes an amplified GPS Antenna, which must be mounted out-doors or beneath a roof sky-
light, facing skyward. An integrated cable links the Antenna to the LTR-GPS Receiver Module, which should be
mounted in-doors.
The Receiver Module verifies and reformats the received satellite data, and offers multiple synchronization
protocol outputs, including a capability to synchronize LTRx-512 Master Clocks to this highly accurate
“Atomic” reference.
Simple DIP-Switch set-up enables the installer to specify Local Time Zone, Daylight Savings Time corrections,
and output formats. An LED indicator shows Signal Reception / Protocol Mode.
Unshielded Twisted-Pair (UTP) Cable (Cat-3 or Cat-5) is suitable to connect the D+/D- Data Output Terminals
of the LTR-GPS to the D+/D- “Sync-In” Terminals on the back of the Master Clock’s Front Panel Assembly.
The LTR-GPS may receive its power from an LTRx-512-series Master Clock, using a 2nd cable pair (as illustrated
below), if the distance is less than 200ft; else, power is provided locally by a 9vAC Power Adapter.
4000 FT. MAX
200 FT. MAX;
ELSE USE POWER ADAPTER
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APPENDIX G – POWER SUPPLY SCHEMATICS
Power Supply Schematics
LTR8-512 / LTR8-512M
LTR4-512
(C) 2000 LATHEM TIME CORP.
VMM7086 REV. D
(C) 2000 LATHEM TIME CORP.
VMM7086 REV. D
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Programming Charts
BELL SCHEDULE PROGRAMMING CHART
SCHEDULE #: 1 2 3 4 5 6 7 8
(Circle One)
DATE:____-____-____
REC
No.
Ex.
DAYS
SMSTWTFSH 12345678
MTWTF 1234
CIRCUITS
START DUR REC
DAYS
SMSTWTFSH
MTWTF
CIRCUITS
12345678
1234
START
HH:MM
08:00
DUR
SS
5
HH:MM
SS
No.
Ex.
08:00
5
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
COPY THIS PAGE FOR USE IN CREATING YOUR OWN BELL SCHEDULES
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Programming Charts
SCHEDULE CHANGE DATES PROGRAMMING CHART
DATE:____-____-____
REC
NO. MM DD
06 02
DATE
TIME
SCHEDULES
12345678
YY HH
MM
COMMENTS
Shortened Schedule
Ex.
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
10 07
00
2345
COPY THIS PAGE TO USE IN CREATING YOUR SCHEDULE CHANGE TABLE
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Programming Charts
HOLIDAYS SETUP CHART
DATE:____-____-____
RECORD
NO.
DATE
DD
MM
07
YY
10
COMMENTS
Independence Day
Ex.
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
04
COPY THIS PAGE TO USE IN CREATING YOUR HOLIDAY TABLE
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LTRx-512 Installation and User’s Guide
FOR UNITS EQUIPPED WITH AN INTERNAL MODEM
NOTICE: This equipment complies with Part 68 of the FCC Rules. On the mounting panel of this equipment is a label that contains,
among other information, the FCC Registration Number and Ringer Equivalence Number (REN) for this equipment. If requested, provide
this information to your Telephone Company.
The registration jack USOC for this equipment is (RJ-11). An FCC compliant telephone cord and modular plug is provided with this
equipment. This equipment is designed to connect to the telephone network or premises wiring using a compatible modular jack, which
is Part 68 compliant. See installation instructions for details.
The REN is useful to determine the quantity of devices that may be connected to the telephone line. Excessive RENs on the telephone
line may result in the devices not ringing in response to an incoming call. In most, but not all areas, the sum of “REN” of all devices
should not exceed five (5). To be certain of the number of devices that may be connected to a line, as determined by the total “REN”,
contact the local Telephone Company.
If your telephone equipment (Modem) causes harm to the telephone network, the Telephone Company will notify you in advance that
temporary discontinuance of service may be required, but if advance notice isn’t practical, you will be notified as soon as possible. You
will be advised of your right to file a complaint with the FCC if you believe it is necessary.
Your Telephone Company may make changes in its facilities, equipment, operations or procedures that could affect the operation of
your equipment. If they do, you will be given advance notice so as to give you an opportunity to maintain uninterrupted service.
If you experience trouble with this equipment (Modem), please contact Lathem Time Customer Service at (800) 241-4990 for
repair/warranty information. If your equipment is causing harm to the telephone network, the Telephone Company may request that
you disconnect the equipment until the problem is resolved.
A Lathem-Authorized Service Center will replace a defective Lathem Modem product.
This equipment may not be used on public coin service provided by the Telephone Company. Connection to party lines is subject to
state tariffs. (Contact your state public utility commission or corporation commission for information.)
NOTICE: The Industry Canada label identifies certified equipment. This certification means that the equipment meets certain
telecommunications network protective, operational and safety requirements. The Industry Canada does not guarantee the
equipment will operate to the user’s satisfaction.
Before installing this equipment, users should ensure that it is permissible to be connected to the facilities of the local
Telecommunications Company. This equipment must also be installed using an acceptable method of connection. In some cases, the
company’s inside wiring associated with a single line individual service may be extended by means of a certified connector assembly
(telephone extension cord). The customer should be aware that compliance with the above conditions may not prevent degradation of
service in some situations.
Any equipment repairs made by the user, or equipment malfunctions, may give the Telecommunications Company cause to request the
user to disconnect the equipment.
Users should ensure, for their own protection, that the electrical ground connections of the power utility, telephone lines and internal
metallic water pipe system, if present, are connected together. This precaution may be particularly important in rural areas.
Caution: Users should not attempt to make such connections themselves, but should contact the appropriate electric inspection
authority, or electrician, as appropriate.
NOTE: The Ringer Equivalence Number (REN) assigned to each terminal device provides an indication of the maximum number of
terminals allowed to be connected to a telephone interface. The termination of an interface may consist of any combination of devices
subject only to the requirement that the sum of the Ringer Equivalence Numbers of all the devices does not exceed 5.
A NOTE ABOUT THE LITHIUM BATTERY
This product's lithium battery contains Perchlorate Material - special handling may apply. Please go to web site
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LTRx-512 Installation and User’s Guide
Limited One-Year Limited Warranty
Lathem warrants the hardware products described in this guide against defects in material and workmanship
for a period of one year from date of original purchase from Lathem or from an authorized Lathem reseller.
The conditions of this warranty and the extent of the responsibility of Lathem Time Corporation (“Lathem”)
under this warranty are listed below.
1. This warranty will become void when service performed by anyone other than an approved Lathem
warranty service dealer results in damage to the product.
2. This warranty does not apply to any product which has been subject to abuse, neglect, or accident, or
which has had the serial number altered or removed, or which has been connected, installed, adjusted,
or repaired other than in accordance with instructions furnished by Lathem.
3. This warranty does not cover dealer labor cost for removing and reinstalling the machine for repair, or
any expendable parts that are readily replaced due to normal use.
4. The sole responsibility of Lathem under this warranty shall be limited to repair of this product, or
replacement thereof, at the sole discretion of Lathem.
5. If it becomes necessary to send the product or any defective part to Lathem or any authorized service
dealer, the product must be shipped in its original carton or equivalent, fully insured with shipping
charges prepaid. Lathem will not assume any responsibility for any loss or damage incurred in shipping.
6. WARRANTY DISCLAIMER AND LIMITATION OF LIABILITY: Except only the limited express warranty set
forth above, the products are sold with no expressed or implied warranties of any kind, and the implied
warranties of merchantability and fitness for a particular purpose are hereby expressly disclaimed. No
warranties are given with respect to products purchased other than from Lathem or an authorized
Lathem reseller and any such products are purchased "as is, with all faults." In no event will Lathem be
liable for any direct, indirect, special, incidental or consequential damages arising out of or in
connection with the delivery, use or inability to use, or performance of this product. In the event any
limited remedy given herein shall be deemed to have failed of its essential purpose, Lathem's maximum
liability shall be to refund the purchase price upon return of the product.
7. Proof of date of purchase from Lathem or an authorized Lathem reseller is required for warranty service
on this product.
8. This Warranty grants specific legal rights. Additional legal rights, which may vary by locale, may also
apply.
9. Should any difficulties arise with the performance of this product during warranty, or with any Lathem
authorized service centers, contact Lathem Time at the address below.
Lathem Time
200 Selig Drive, SW, Atlanta, GA 30336
404-691-0405
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LTRx-512 Installation and User’s Guide
Index
A
Function [C] - Change Password .................... 29
H
Administrator password ..........................11, 19
Auto Bell Test ......................................15, 22
B
Hidden codes.......................................15, 22
Hidden power supply............................... 6, 55
Holiday schedules ............................18, 22, 28
I
Baud rate ............................................... 29
Baud Rate............................................... 18
Bell schedules .......................................... 22
Bell zones ............................................... 11
Bell Zones............................................... 60
C
Impulse type clocks ................................... 27
L
Lights .................................................... 22
LTR MasterLink.....................................26, 29
LTR MasterLink software .........................16, 55
P
Change Password ..................................19, 29
Change Schedule....................................... 26
Clock sync control..................................... 11
Communications .................... 16, 19, 29, 30, 55
Communications function............................ 29
Country code .......................................18, 26
D
Passwords......... 11, 19, 21, 22, 25, 26, 27, 28, 29
Program Holidays function........................... 28
Program Keys........................................... 18
Q
Quick Check Command [*] ........................... 18
Quick Check Command [1]........................... 18
Quick Check Command [3]........................... 18
R
Daylight savings....................................18, 26
Disable circuits.....................................13, 26
E
Rack mount...............................................5
RS-485 network ............11, 14, 16, 29, 30, 53, 55
S
Enable circuits ................................13, 19, 26
F
Function [0] – Password ..........................11, 19
Function [1] – Set Date and Time................... 19
Function [2] - Select Clock Control................. 21
Function [2] – Select Clock Control................. 14
Function [3] - Manual Bell Control.................. 21
Function [3] – Manual Bell Control.................. 15
Function [4] - Program Schedules .................. 22
Function [6] - Enable/Disable Circuits............. 26
Function [7] - Daylight Savings...................... 26
Function [8] - Change Schedule..................... 26
Function [9] - Sync Clocks............................ 27
Function [A] - Program Holidays .................... 28
Function [B] - Communications ..................... 29
Function [B] – Communications ..................... 16
Schedule Changes function .......................... 25
Schedules ...................13, 20, 22, 25, 26, 60, 61
Semi-flush mount........................................3
Surface mount............................................2
Sync Clocks function .................................. 27
Synchronous clock types.............................. 27
Syncing Clocks.................................11, 14, 30
T
Terminal block ......................................... 55
Terminal ID#........................................18, 29
Test circuits ............................................ 21
U
User password............................ 11, 18, 19, 29
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