Troubleshooting guide

TD 92735EN
15 May 2012 / Ver. G
Installation and Operation Manual
Unite Connectivity Manager
205
Figure 93. Cable wiring for modem with 25-pin D-sub connector.
B.6 R232 Cable Connections in a Redundancy System
In a redundancy system, having equipment connected via serial interface, must the R232
cable be attached to both the primary Unite CM and the secondary Unite CM. By using a
RS232 data splitter the cable can be branched to both modules.
9-pin female
D-sub connector
25-pin male
D-sub connector
Modem
Unite CM
1 DCD
2 RX
3 TX
4 DTR
5 GND
6 DSR
7 RTS
8 CTS
9 RI
8 DCD
3 RX
2 TX
2 DTR
7 GND
G DSR
4 RTS
5 CTS
22 RI
RS232
COM port
COM port
Unite
Connectivity
Manager
RS232
COM port
Unite
Connectivity
Manager
External
Equipment
RS232
Splitter