Telex Intercom System SPS2000A User Manual
®
Telex  
User Instructions  
SPS2000A  
1
RESET  
2
olume  
V
Model SPS2000A  
Power Supply  
Audiocom® Intercom Systems  
®
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Table of Contents  
Description  
Installation  
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4
6
Unpacking  
6
Configuration Switches .  
6
Intercom Channel and Program Connections  
6
Power-Up Check .  
Specifications  
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13  
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Factory Service and Parts Information  
3
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Audiocom®  
Description  
The SPS2000A is a versatile power supply that can be used in a variety of Audiocom®  
intercom system applications. It is ideal for applications where it is desirable to use a  
master station with a panel mic / speaker combination. The SPS2000A directly accepts  
any AC input power from 100 to 240 VAC, 50/60 Hz, and it can be configured to  
power two separate intercom channels or one large intercom channel with twice the in-  
tercom station capacity. Additionally, the SPS2000A can be configured for compatibil-  
ity with Clear-Com* Intercom Systems. The SPS2000A can be rack mounted or used  
on a desktop. For rack mounting, optional hardware is required. For desktop use, four  
non-marring rubber feet are supplied.  
®
SPS2000A  
1
Combine  
Isolate  
2
Reset  
Volume  
1
2
3
4
5
SPEAKER  
INPUT  
1
2
®
INPUT  
100-240 VAC 60/50 HZ  
CHN  
1
CHN  
2
MADE IN USA  
LINE LEVEL  
1 VRMS  
CLASS 2 WIRING 1.5A 24VDC  
Figure 1. SPS2000A Reference View  
(See following numbered descriptions)  
1. Speaker, Inputs, and Volume Control: Two audio inputs are provided. The inputs  
are combined internally and sent as a monaural signal to the internal speaker  
amplifier. The Volume control adjusts the level to the front panel speaker. Typi-  
cally, these inputs are used with the speaker outputs of a master station when the  
master station is set for use with a panel mic and speaker instead of a headset.  
* Brand names mentioned are the property of their respective companies.  
4
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2. Combine / Isolate Switch: This recessed, pushbutton switch lets you combine  
the audio signals of the two channels to create a single audio channel where all  
users can intercommunicate. Or, you can isolate each channel to create two  
groups of completely independent users.  
3. Channel Status Indicators and Reset Pushbutton: The indicators are green for nor-  
mal operation and red when there is an overload or short circuit. The Reset push-  
button restores normal operation after the short-circuit or overload has been  
located and fixed.  
4. Universal AC Power Input: The SPS2000A accepts any input power in the range  
of 100-240 VAC, 50/60 Hz.  
5. Intercom Channel Connectors: When the Combine / Isolate switch is set to the  
Isolate position, each channel connector is powered separately and has com-  
pletely separate intercom audio. When the Combine / Isolate switch is set to the  
Combine position, each channel is still powered separately, but the audio signals  
are combined so that all users on both channels can intercommunicate.  
6. Audiocom / Clear-Com Selector Switch (Figure 2): This selector switch sets the  
SPS2000A for compatibility with either Audiocom (BALANCED) or Clear-  
Com (UNBALANCED). Compatibility includes channel connector pin-outs,  
channel power requirements, and call signaling requirements. The SPS2000A is  
shipped with this switch in the Audiocom position.  
5
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Audiocom®  
Installation  
Unpacking  
The package contains the following items. Contact the shipper or your Audiocom  
dealer immediately if anything is damaged or missing. Detach and fill out the regis-  
tration card and return it to Telex to properly register your SPS2000A.  
Quantity  
Description  
1
1
1
4
1
SPS2000A Power Supply  
Warranty and registration card  
User Manual  
Rubber feet (install for desktop use of the SPS2000A)  
Power cord  
Configuration Switches  
WARNING  
The following instructions are for use by qualified personnel only.  
To avoid electric shock, do not remove the cover unless you are  
qualified to do so.  
AVERTISSEMENT  
Les instructions qui suivent s'adressent uniquement a un techni-  
cien qualifie. Pour evite des chocs electriques, ne pas ouvrir le  
boitier, a moins d'y entre habilite.  
The Audiocom / Clear-Com switch (S200) is factory set for use with Audiocom in-  
tercom stations. Before using the SPS2000A with Clear-Com, remove the top cover  
and change the setting as shown in Figure 2. The top cover is secured by five screws  
on the top and three screws on each side.  
The Combine / Isolate switch position may be changed at any time by inserting a pen  
point or other small object through the front panel. When the switch is in the Com-  
bine position, all users on both channels may intercommunicate. When the switch is  
set to the Isolate position, channels 1 and 2 cannot intercommunicate.  
Intercom Channel and Program Connections  
Channel Capacity: When connecting intercom stations to the SPS2000A, determine  
the total current for all stations on each channel. The total per channel should not ex-  
ceed 2A. If you exceed this limit, the SPS2000A will provide an overload indication.  
6
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Figure 2. Audiocom / Clear-Com Selector Switch (Top Cover Removed)  
Note that if you are using DC wallpacks with some intercom stations, you do not  
need to add the current consumption of those stations to the total current.  
Audiocom Connections: Intercom cable wiring details are shown in Figure 3.  
Speaker interconnect cables are standard RCA phono types. For program input cable  
wiring, refer to your master intercom station user manual. Some typical intercom  
system applications are shown in Figures 4 through 6.  
Clear-Com Applications: Refer to your Clear-Com system documentation for inter-  
com cable wiring and connection details.  
7
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Audiocom®  
TYPICAL 1-CHANNEL CABLE WIRING  
3
2
3
Pair 1  
Pair 2  
2
1 (Both wires)  
1
Shield  
Shield  
Cable Type: 22AWG Stranded, 2-Pair Twisted-wire, with Shield  
Connector Type: 3-Pin XLR Audio (Neutrik or Switchcraft)*  
Pin 1: Common  
Denotes twisted pair.  
Pin 2: Channel Audio / Power  
Pin 3: Channel Audio / Power  
Shield: Earth ground  
Denotes shield.  
TYPICAL 2-CHANNEL CABLE WIRING  
4
3
6
5
4
Pair 1  
Pair 2  
Pair 3  
3
6
5
1 (Both wires)  
Shield  
1
Shield  
Cable Type: 22AWG Stranded, 3-Pair Twisted-wire, with Shield  
Connector Type: 6-Pin XLR Audio (Neutrik only, not compatible with 6-pin Switchcraft)*  
Pin 1: Channel 1 & 2 Common  
Pin 2: No connection  
Denotes twisted pair.  
Denotes shield.  
Pin 3: Channel 1 Audio / Power  
Pin 4: Channel 1 Audio / Power  
Pin 5: Channel 2 Audio / Power  
Pin 6: Channel 2 Audio / Power  
Shield: Earth ground  
3
2
1
“Y” CABLE WIRING  
Ch1  
4
3
6
5
Pair 1  
Pair 2  
Pair 3  
Case  
3
2
1
1 (Both wires)  
Shield  
Ch2  
Shield  
Use second drain wire if available, or add an extra section of wire.  
*
Standard cables are generally constructed using a male connector at one end and a  
female connector at the other end. This allows several cables to be interconnected to  
create longer cable runs. Audiocom master stations, speaker stations and belt packs  
also typically provide both a male and female Neutrik connector for each intercom  
channel. This permits loop-through connection of several intercom stations using the  
standard cables. Audiocom power supplies use a 3-pin male Neutrik connector for  
each channel. Audiocom wallplates use male Neutrik connectors.  
Figure 3. Intercom Cable Wiring Diagrams for Audiocom Applications  
8
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1
2
Y
1-channel cable  
2-channel cable  
“Y” cable  
SPS2000A  
Power Supply  
Combine / Isolate Switch  
set to Isolate  
SPEAKER  
INPUT  
INPUT  
1
2
®
100-240 VAC 60/50 HZ  
CHN  
1
CHN  
WIRING 1.5A 24VDC  
2
MADE IN USA  
LINE LEVEL  
1
VRMS  
CLASS  
2
Speaker Inter-  
connect cable.  
1
1
US2000A  
Master Station  
PUSH  
PUSH  
PROGRAM  
INPUTS  
Program Input  
cable. From 2  
audio sources  
1
2
SPEAKERS  
LINE LEVEL  
VOL  
PGM  
VOL  
PGM 2  
+
-
1
VRMS  
1
EXP  
OUT  
P.A.  
BAL  
UNBAL  
-
OUT  
IN  
CHN  
1
CHN  
2
12-15 VDC  
-
To all stations  
on channel 1  
To all stations  
on channel 2  
1
1
BP-1000  
BP-1000  
HEADSET  
LINES  
HEADSET  
LINES  
1
1
BP-1000  
BP-1000  
HEADSET  
LINES  
HEADSET  
LINES  
Y
BP-2000  
Note: A JB-2 Junction Box may be  
used instead of the “Y” cables. The  
JB-2 provides a means of combining  
two channels, while also allowing the  
single channels to be continued  
directly from the junction box.  
HEADSET  
LINES  
2
BP-2000  
HEADSET  
LINES  
Y
BP-1000  
BP-1000  
HEADSET  
LINES  
HEADSET  
LINES  
Figure 4. Typical connections using one SPS2000A Power Supply for two  
intercom channels. The two program sources are monitored independently  
by the intercom channels. All audio (program and intercom) is monitored as  
a monaural mix in the SPS2000A speaker. The US2000A is set for  
monaural speaker output (default).  
9
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Audiocom®  
1
2
Y
1-channel cable  
2-channel cable  
“Y” cable  
SPS2000A  
Power Supply  
Combine / Isolate Switch  
set to Isolate  
SPK1000  
Powered Speaker  
TELEX COMMUNICATIONS, INC.  
MADE IN USA  
SPEAKER  
INPUT  
1
INPUT  
INPUT  
1
2
®
+
-
INPUT  
2
100-240 VAC 60/50 HZ  
BAL  
CHN  
1
CHN  
WIRING 1.5A 24VDC  
2
LINE LEVEL  
VRMS  
MADE IN USA  
12-15 VDC  
1
LINE LEVEL  
1
VRMS  
CLASS  
2
Speaker inter-  
connect cables.  
1
1
US2000A  
Master Station  
PUSH  
PUSH  
PROGRAM  
INPUTS  
Program input  
cable. From 2  
audio sources  
1
2
SPEAKERS  
LINE LEVEL  
VOL  
PGM  
VOL  
PGM 2  
+
-
1
VRMS  
1
EXP  
OUT  
P.A.  
BAL  
UNBAL  
-
OUT  
IN  
CHN  
1
CHN  
2
12-15 VDC  
-
To all stations  
on channel 1  
To all stations  
on channel 2  
1
1
BP-1000  
BP-1000  
HEADSET  
LINES  
HEADSET  
LINES  
1
1
BP-1000  
BP-1000  
HEADSET  
LINES  
HEADSET  
LINES  
Y
BP-2000  
Note: A JB-2 Junction Box may be  
used instead of the “Y” cables. The  
JB-2 provides a means of combining  
two channels, while also allowing the  
single channels to be continued  
directly from the junction box.  
HEADSET  
LINES  
2
BP-2000  
HEADSET  
LINES  
Y
BP-1000  
BP-1000  
HEADSET  
LINES  
HEADSET  
LINES  
Figure 5. Adding an SPK1000 to the example in Figure 4. The two program  
sources are monitored independently by the intercom channels. The  
SPS2000A monitors intercom channel 1 and program 1. The SPK1000  
monitors intercom channel 2 and program 2. The US2000A is set for  
binaural speaker output as described in the US2000A User Manual.  
10  
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SPS2000A  
Channel 1 Power  
Combine / Isolate Switch  
set to Combine  
SPS2000A  
Channel 2 Power  
Combine / Isolate Switch  
set to Combine  
SPEAKER  
SPEAKER  
INPUT  
1
INPUT  
1
®
®
INPUT  
2
INPUT  
2
100-240 VAC 60/50 HZ  
100-240 VAC 60/50 HZ  
CHN  
1
CHN  
1
CHN  
WIRING 1.5A 24VDC  
2
CHN  
WIRING 1.5A 24VDC  
2
MADE IN USA  
MADE IN USA  
LINE LEVEL  
VRMS  
LINE LEVEL  
VRMS  
1
1
CLASS  
2
CLASS  
2
1
1
Speaker inter-  
connect cables.  
PUSH  
PUSH  
PROGRAM  
INPUTS  
1
SPEAKERS  
LINE LEVEL  
VOL  
PGM  
VOL  
PGM  
+
-
1
VRMS  
1
2
2
EXP  
OUT  
P.A.  
BAL  
UNBAL  
-
OUT  
IN  
CHN  
1
CHN  
2
12-15 VDC  
-
US2000A  
Internal DIP  
switches set  
for binaural  
operation  
Program input  
cable. From 2  
audio sources  
1
1
1
1
To ½ of stations  
on channel 1  
To ½ of stations To ½ of stations  
on channel 1 on channel 2  
To ½ of stations  
on channel 2  
1
Denotes 1-channel cables  
Figure 6. Using two SPS2000A Power Supplies to provide a greater  
capacity on each channel. Using two SPS2000A Power Supplies also lets  
you independently monitor and adjust volume for both intercom channels  
without the need for a separate powered loudspeaker. In this application,  
the US2000A should be set for binaural speaker output as described in the  
US2000A User Manual.  
Power-Up Check  
1. Plug in any DC wallpacks that are being used with individual intercom stations.  
If you plug in DC wallpacks after applying power to the SPS2000A, you  
☞
may get an overload indication at the SPS2000A. This is because the  
stations that are being powered by wallpacks will draw current from the  
SPS2000A until their own DC supplies are connected.  
11  
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Audiocom®  
2. Plug in the AC power cords for any connected SPS2000A Power Supplies. The  
channel status indicators should be green.  
3. If a channel status indicator turns red during operation, try correcting the prob-  
lem by pressing the reset button on the front of the SPS2000A. If the problem  
persists, unplug the SPS2000A and locate the short or overload that is causing  
the problem.  
12  
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Specifications  
General  
Input Power Requirements:  
100 to 240 VAC, 50 / 60 Hz  
Output Power (each channel)  
21 ± 1 VDC, 2A  
Dimensions: 1.75" (44.5 mm) high x 8.25" (209.5 mm) wide x 10.31" (261.9 mm) deep  
Weight: approximately 2.5 lb (1.13 kg)  
Environmental Requirements:  
Storage: -20°C to 80°C; 0% to 95% humidity, non-condensing  
Operating: 0°C to 50°C; 0% to 95% humidity, non-condensing  
Intercom Channels  
General  
Connector Type: One XLR-3M audio connector for each channel. Pin-out depends on setting  
of internal switch S200 for balanced or unbalanced operation as defined below.  
Balanced Mode (S200 set to BAL position)  
Line Terminating Impedance: 300 ohms ± 10%  
Connector Pin-out  
Pin 1  
Pin 2  
Pin 3  
Common (audio and DC return)  
Full-duplex, balanced intercom audio and +24 VDC output  
Full-duplex, balanced intercom audio and +24 VDC output  
Unbalanced Mode (S200 set to UNBAL position)  
Line Terminating Impedance: 150 ohms ± 5%  
Connector Pin-out  
Pin 1  
Pin 2  
Pin 3  
Common (audio and DC return)  
+24 VDC output  
Full-duplex, unbalanced Intercom audio high  
Speaker Inputs  
Type: RCA Phone Jack  
Tip: Speaker + input  
Sleeve: Speaker - input  
Approvals  
UL, CUL, CE  
13  
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Audiocom®  
Factory Service and Parts Information  
When returning equipment for repair include your return address, telephone number  
and proof of date of purchase, along with a description of the problem.*  
The address for Audiocom equipment returns and parts information is:  
Service Department  
Telex Communications, Inc.  
West 1st Street  
Blue Earth, Minnesota 56013 U.S.A.  
Telephone: (507) 526-3205  
(Collect calls not accepted)  
Warranty Repairs - If in warranty, no charge will be made for the repairs. Equipment  
returned for warranty repair must be sent prepaid and will be returned prepaid.  
Non-Warranty Repairs - Equipment that is not under warranty must be sent prepaid  
to Telex. If requested, an estimate of repair costs will be issued prior to service. After  
your approval and completion of the repairs, the equipment will be returned on a col-  
lect basis. Collect charges may be avoided by sending a signed check for payment in  
full along with your signed estimate approval form (shipping charges are included in  
the estimate).  
* For sales / technical support and system design contact:  
Pro Audio Sales Department  
Telex Communications, Inc.  
9600 Aldrich Avenue South  
Minneapolis, Minnesota 55420 U.S.A.  
Telephone: (612) 884-4051  
(Collect calls not accepted)  
14  
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Notes  
15  
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®
TELEX COMMUNICATIONS, INC.  
9600 Aldrich Ave. So., Minneapolis, MN 55420 U.S.A.  
9350-7333-010 Rev. A2, 8/97  
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