Comtrol DeviceMaster PRO - Nine Screw Terminals (DM-2201); Screw Terminal Connectors (9); Screw Terminal (9) Null-Modem RS-232 Cables

100 - Connecting Serial Devices DeviceMaster Installation and Configuration Guide: 2000594 Rev. F
Connecting Serial Devices
Nine Screw Terminals (DM-2201)
This subsection discusses the following topics for the DM-2201 with 9 serial screw terminals.
• Screw Terminal Connectors (9) on Page 100
• Screw Terminal (9) Null-Modem RS-232 Cables on Page 100
• Screw Terminal (9) Null-Modem RS-422 Cables on Page 101
• Screw Terminal (9) RS-232/485 Straight-Through Cables on Page 101
• Screw Terminal (9) Loopback Signals on Page 102
• Connecting Serial Devices on Page 102
Screw Terminal Connectors (9)
Use the following table or drawings for signal information.
Screw Terminal (9) Null-Modem RS-232 Cables
An RS-232 null-modem cable is required for connecting DTE devices.
RS-232 CD DSR RI DTR TxD RTS RxD CTS Signal GND
RS-422/RS-485
Full-Duplex
N/A N/A N/A N/A TxD- TxD+ RxD- RxD+ Signal GND
RS-485 Half-
Duplex
N/A N/A N/A N/A TRxD- TRxD+ N/A N/A Signal GND
† Ground must be connected to the signal ground terminal.
RS-232
RS-422
RS-485 Full-Duplex
RS-485 Half-Duplex
CD
DSR
RI
DTR
TxD
RTS
RxD
CTS
Signal
Gnd
Signal
Gnd
Signal
Gnd
TxD-
TxD+
RxD-
RxD+
TRxD-
TRxD+
† Groundmustbeconnectedtothesignalgroundterminal.
RS-232 Null-Modem Cable
CD DSR RI DTR RTSTxD RxD CTS
DCD DTR RI DSR CTSRxD TxD RTS
1496 837
820226 5324
DB9
DB25
2
Sig Gnd
Gnd
5
7