NOVEMBER 1995
IC483A
IC483AE
IC483C
IC481A-R2
IC481C-R2
↔
V.35 RS-422 Interface Converter
Order toll-free in the U.S.: Call 877-877-BBOX (outside U.S. call 724-746-5500)
FREE technical support 24 hours a day, 7 days a week: Call 724-746-5500 or fax 724-746-0746
Mailing address: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018
CUSTOMER
SUPPORT
INFORMATION
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↔
V.35 RS-422 INTERFACE CONVERTER
TRADEMARKS USED IN THIS MANUAL
Any trademarks mentioned in this manual are acknowledged to be the property of the trademark owners
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CONTENTS
Contents
Chapter
Page
1. SPECIFICATIONS......................................................................................................................................4
2. INTRODUCTION ......................................................................................................................................5
3. INSTALLATION.........................................................................................................................................6
3.1
3.2
DIP Shunt Settings........................................................................................................................6
LEDs ..............................................................................................................................................8
4. GROUND STRAP AND PIN CONNECTIONS ........................................................................................9
4.1
4.2
Ground Strap ................................................................................................................................9
Pin Connections..........................................................................................................................10
3
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V.35 RS422 INTERFACE CONVERTER
1. Specifications
Speed —
Up to 2.5 Mbps
Maximum
Transmission
Rate —
Approximately 2.455 Mbps
RS-422, V.35
Interface —
Connectors —
IC481A-R2: RS-422: (1) DB37 female (pinned to RS-449 specifications);
V.35: (1) male 34-pin “M” block
IC483A:
RS-422: (1) DB37 female (pinned to RS-449 specifications);
V.35: (1) female 34-pin “M” block
Controls —
Jumpers for Pin H Support
V.35 port DTE/DCE jumper-selectable
RS-422 port DTE/DCE jumper-selectable
Maximum Storage
Temperature —
158°F (70°C)
Maximum
Operating
Temperature —
122°F (50°C)
Power —
IC481A-R2, IC483A: 115-VAC, 60-Hz, 16-watt power supply;
IC483AE: 230-VAC, 50 Hz, 16-watt power supply;
IC481C-R2, IC483C: Requires 16 watts from RM060 interface
Size —
Standalone: 2.3"H x 8"W x 11.9"D (5.8 x 20.3 x 30.2 cm)
Rackmount Card: 7.5"W x 10.5"D (19.1 x 26.7 cm)
Weight —
2 lb. (0.9 kg)
4
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CHAPTER 2: Introduction
2. Introduction
The V.35↔RS-422 Interface Converter comes in both 115-VAC (IC483A) and 230-VAC (IC483AE)
standalone units. A card version (IC483C) is available for rackmounting. The rack (RM060) is
switch-selectable for either 115-VAC or 230-VAC operation.
The V.35↔RS-422 Interface Converter provides bidirectional conversion of all the commonly used
V.35 and RS-422 signals. The unit operates with one port configured as Data Terminal Equipment
(DTE) and the other port configured as Data Communications Equipment (DCE).
The unit has two jumper-selectable configurations. One connects RS-422 modem equipment to V.35
terminal equipment (DCE to DTE). The other connects V.35 modem equipment to RS-422 terminal
equipment (DTE to DCE). Both configurations allow bidirectional data transfer. Typical applications
are shown in Figure 2-1.
NOTE
The Converter is configured opposite of the equipment you are connecting.
RS-422/V.35
RS-422
MODEM
(DCE)
DTE
DCE
V.35
TERMINAL
COMPUTER
(DTE)
RS-422/V.35
V.35
DCE
DTE
RS-422
TERMINAL
COMPUTER
(DTE)
MODEM
DSU
(DCE)
Figure 2-1. Typical Applications of the RS-422<—>V.35 Interface Converter.
5
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V.35 RS422 INTERFACE CONVERTER
3. Installation
3.1 DIP Shunt Settings
The V.35↔RS-422 Interface Converter has two jumper selectable configurations determined by DIP
shunt settings located inside the unit on the printed circuit board. One configuration is for connecting
RS-422 DTE to V.35 DCE. The second configuration is for connecting V.35 DTE to RS-422 DCE. See
Figure 3-1 for more information on DIP Shunt settings.
DTE DCE
A
B
V.35 DTE
XW6
STEP 1
XW5
XW4
V.35 CONNECTOR
STEP 2
W1
A
XW3
XW2
XW1
B
C
RS-422 CONNECTOR
STEP 4
W2
STEP 3
A
B
C
If V.35 is DTE
OR
DTE DCE
A
B
XW6
STEP 1
XW5
XW4
V.35 CONNECTOR
STEP 2
422 DTE
FACTORY
DEFAULT
SETTING
W1
A
XW3
XW2
XW1
B
C
RS-422 CONNECTOR
STEP 4
W2
STEP 3
A
B
C
If RS232 is DTE
STEP 4 Pin H Supported (As shipped)
W1 in BC Position (DTR passed from V.35 to RS-422 port)
W2 in AB Position
OR
Pin H Not Supported
W1 in AB position
W2 in BC Position
Figure 3-1. Quick Setup Guide for DIP Shunt Settings.
6
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CHAPTER 3: Installation
To install the V.35↔RS-422 Interface Converter, follow these steps and refer to Figures 3-1 and 3-2.
1. Set jumper XW6 to V.35 side when configuring the V.35 side of the unit as DTE. Set XW6 to the 422 side
when configuring the RS422 side of the unit as DTE. Jumper XW6 affects only the front panel LEDs.
2 & 3. When configuring V.35 as DTE and RS-422 as DCE, set jumpers in sockets labeled XW1B,
XW2B, XW3B, XW4A, and XW5A.
When configuring V.35 as DCE and RS-422 as DTE, set jumpers XW1A, XW2A, XW3A, XW4B, and XW5B.
4. Jumper W1 is used if the V.35 side of the Converter is DCE. If W1 is in the B-C position, the DTR signal
(pin H) is passed from the V.35 port through to pins 12 and 30 of the RS-422 port. If W1 is placed in
the A-B position, pins 12 and 30 are forced high. When the V.35 side is configured as DTE, W1 has no
effect and W2 is used instead. With W2 in the A-B position, the terminal ready (DTR) signal is passed
from the RS-422 side of the V.35 port. With W2 in the B-C position, Pin H is forced high.
5. Attach the cable from the RS-422 device to the 37-pin female receptacle (J1) on the rear panel of the
V.35↔RS-422 Interface Converter.
6. Attach the cable from the V.35 device to the 34-pin female M-block connector (J2) on the rear panel
of the V,35↔RS-422 Interface Converter.
7. Plug the 4-pin power cord into the receptacle on the rear panel of the case. Do not plug the power
module into an AC outlet yet. After the DIP shunts are set as explained in Section 3.1, plug the
power module into an AC outlet. The unit is now ready to use.
Figure 3-2. Board Layout Showing LED Indicators and Plug Connectors.
7
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V.35 RS422 INTERFACE CONVERTER
3.2 LEDs
The V.35↔RS-422 Interface Converter is equipped with ten LED indicators located on the front panel.
The row of type above the LEDs indicates the uses of the LEDs for a RS422 DTE/V.35 DCE
configuration. The row of type below the LEDs indicates the uses of the LEDs for a V.35DTE/RS422
DCE configuration. Refer to Figure 3-3. In the card version, the LED’s distinction is on the pull lever.
Figure 3-3. Front Panel LEDs.
8
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CHAPTER 4: Ground Strap and Pin Connections
4. Ground Strap and Pin Connections
4.1 Ground Strap
Signal grounds (Pins 19, 20, and 37 on the 422 interface and Pin B on the V.35 interface) are connected
together, but not connected to chassis ground (Pin A). However, for applications requiring the grounds
at a common reference point, the grounds can be connected by installing a jumper strap across W3
located at the rear of the printed circuit board between J1 and P1.
CHASSIS GROUND
REQUEST TO SEND
A
C
B
D
SIGNAL GROUND
CLEAR TO SEND
DATA SET READY
DATA TERMINAL READY
TEST MODE
E
H
K
F
J
L
RECEIVE LINE SIGNAL DETECT
LOCAL LOOPBACK
TEST PATTERN
TRANSMITTED DATA
TRANSMITTED DATA
P
S
R
T
RECEIVED DATA
RECEIVED DATA
TRANSMIT TIMING
TRANSMIT TIMING
TRANSMIT TIMING
U
W
Y
V
X
RECEIVE TIMING
RECEIVE TIMING
TRANSMIT TIMING AA
BB REMOTE LOOPBACK
Figure 4-1. V.35 Interface
1
2
3
4
5
6
7
8
9
10
SHIELD
RECEIVE COMMON 20
21
SEND DATA 22
SEND TIMING 23
RECEIVE DATA 24
REQUEST TO SEND 25
RECEIVE TIMING 26
CLEAR TO SEND 27
28
DATA MODE 29
TERMINAL READY 30
RECEIVER READY 31
32
SEND DATA
SEND TIMING
RECEIVE DATA
REQUEST TO SEND
RECEIVE TIMING
CLEAR TO SEND
11 DATA MODE
12 TERMINAL READY
13 RECEIVER READY
14
33
34
15
16
TERMINAL TIMING 35
36
SEND COMMON 37
17 TERMINAL TIMING
18
19 SIGNAL GROUND
Figure 4-2. RS-422 Interface.
9
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V.35 RS422 INTERFACE CONVERTER
4.2 Pin Connections
Figures 4-1 and 4-2 show the pin connections for the V.35↔RS-422 Interface Converter. The illuminated
LEDs in these figures indicate incoming signals only.
The unit is shipped without the jumper (Rx) between signal ground and chassis ground. The RS-422
port is configured DTE and the V.35 port is configured DCE.
1
For operation with the RS422 port as DCE and the V.35 port as DTE, the signal directions are reversed .
Pins 12 and 30 of the RS422 port become inputs which are connected to a status LED.
1
In this configuration, W1 has no effect on the circuit W2 is used instead.
W2
A
Pin 30
B
Pin H
Pin 12
C
The unit is shipped with the TERMINAL READY jumper in the TRUE (ON) position.
AB - DTR passed through
BC - DTR always asserted
10
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CHAPTER 4: Ground Strap and Pin Connections
4
22
P
S
4
22
P
S
DS6
DS5
TD
RD
R
T
6
24
DS5
DS6
TD
RD
6
R
T
24
7
25
C
D
7
25
C
D
E
DS1
DS3
RTS
CTS
9
27
DS3
DS1
RTS
CTS
9
27
11
29
E
F
11
29
DS2
DS4
DSR
SD
13
31
DS9
DS4
DTR/DM
F
13
31
5
23
Y
AA
RR
Y
5
23
DS8
TC
RC
AA
8
26
V
X
DS8
DS7
TC
RC
8
26
V
X
DS7
A
12
30
B
W2
H
17
35
C
U
W
C
C
A
H
12
30
B
DS9
DM/DTR
W1
17
35
U
W
CTS
DS1
RTS
RR
DS4
TD
RD
RC
TC
DM
DS2 DS3
DS10
POWER
DS5
DS6
DS7
DS8
DS9
DS1
RTS
DS2 DS3
DSR CTS
DS4
DS10
DS5
DS6
TD
DS7
RC
DS8
TC
DS9
DTR
SD POWER RD
Figure 4-1. The Converter Configured
for RS-422 as DTE and V.35 as DCE.
Figure 4-2. The Converter Configured for
RS-422 as DCE and V.35 as DTE.
11
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© Copyright 1995. Black Box Corporation. All rights reserved.
1000 Park Drive Lawrence, PA 15055-1018 724-746-5500
•
•
•
Fax 724-746-0746
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