Serial Terminal (4) Null-Modem Cables (Rs-232); Serial Terminal (4) Null-Modem Cables (Rs-422) - Comtrol DeviceMaster DM-2000 Series Installation And Configuration Manual

Serial Terminal (4) Null-Modem Cables (RS-232)

An RS-232 null-modem cable is required for connecting DTE devices.

Serial Terminal (4) Null-Modem Cables (RS-422)

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.
DeviceMaster Installation and Configuration Guide: 2000594 Rev. F
RS-232 Null-Modem Cable
TxD RTS RxD
RxD CTS
2 8
DB9
DB25 3 5
RS-422 Null-Modem Cable
TxD RTS RxD
RxD- RxD+ TxD-
2 8
DB9
DB25 3 5
CTS
TxD RTS
3 7
2 4
CTS
TxD+
3
7
2 4
Connecting Serial Devices
Connecting Serial Devices - 95