Comtrol DeviceMaster DM-2000 Series - Serial Terminal (4) Null-Modem Cables (RS-232); Serial Terminal (4) Null-Modem Cables (RS-422)

DeviceMaster Installation and Configuration Guide: 2000594 Rev. F Connecting Serial Devices - 95
Connecting Serial Devices
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.
RTS RxDTxD CTS
CTS TxDRxD RTS
8237
5324
DB9
DB25
RS-232 Null-Modem Cable
RTS RxDTxD CTS
RxD+ TxD-RxD- TxD+
283
7
3524
DB9
DB25
RS-422 Null-Modem Cable