Screw Terminal (9) Null-Modem Rs-422 Cables; Screw Terminal (9) Rs-232/485 Straight-Through Cables - Comtrol DeviceMaster EIP Series Hardware Installation And Configuration Manual

Screw Terminal (9) Null-Modem RS-422 Cables

An RS-422 null-modem cable is required for connecting DTE devices.
Note: RS-422 pin outs are not standardized. Each peripheral manufacturer uses different pin outs. Please
refer to the documentation for the peripheral to determine the pin outs for the signals above.

Screw Terminal (9) RS-232/485 Straight-Through Cables

RS-232 or RS-485 straight-through cables are used to connect modems and other DCE devices.
DeviceMaster EIP | UP Hardware Installation and Configuration Guide: 2000633 Rev. C
RS-422 Null-Modem Cable
CD DSR RI DTR
DB9
DB25
RS-232/485 Straight-Through Cable
CD DSR RI
DCD DSR RI
1 6 9
DB9
8 6 22
DB25
TxD RTS RxD CTS
RxD- RxD+ TxD- TxD+
2 8 3 7
3 5 2 4
DTR TxD RTS RxD CTS
DTR TxD RTS RxD CTS
or or
TRxD- TRxD+
4 3 7 2
20 2 4 3
Connecting Serial Devices
Sig Gnd
Gnd
5
7
Sig Gnd
Gnd
8 5
5 7
Connecting Serial Devices - 49