CTI Products EXB-232 Asynchronous Serial System Extender - Manual (Page 24)

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20
EXB-Serial Module PORT 1 and PORT 2 Connectors
Connector type: standard DE9 male
Pinout as DTE (PC-AT pinout)
In general, all signals (except RI and DCD) must be connected for proper operation.
EXB Pin Function Direction
1 DCD Input
2 RXD Input
3 TXD Output
4 DTR Output
5 ground ---
6 DSR Input
7 RTS Output
8 CTS Input
9 RI Input
The table below shows the wiring list for back to back connections of two EXB-Serial modules:
EXB 1 Signal Name
EXB 1 Pin EXB 2 Pin EXB 2 Signal Name
TXD 3 2 RXD
RXD 2 3 TXD
DTR 4 6 DSR
DSR 6 4 DTR
CTS 8 7 RTS
RTS 7 8 CTS
ground 5 5 ground