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RAD Data comm ASMi-31 Manuel D’Utilisation

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Appendix C.  X.21 Interface Module
ASMi-31
 Installation and Operation Manual
C-2
X.21 Connectors
Pin Assignment
Table C-1 shows the X.21 DB-15 pin assignment.
Table C-1  IR-X.21 DB-15 (RS-422) Connector Pin Assignment
Pin
ID
Function
1
Shield
Chassis connection
2
A
Transmit signal A
3
A
Control A
4
A
Receive A
5
A
Indication A
6
A
Signal timing  A
7
A
External Timing
8
GND
Common
9
B
Transmit B
10
B
Control B
11
B
Receive B
12
B
Indication B
13
B
Signal Timing B
14
B
External Timing
15
Not connected
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