Nine Screw Terminals; Screw Terminal Connectors (9); Screw Terminal (9) Null-Modem Rs-232 Cables - Comtrol DeviceMaster MOD Series Hardware Installation And Configuration Manual

Connecting Serial Devices

Nine Screw Terminals

Screw Terminal
Connectors (9)
Screw Terminal (9)
Null-Modem RS-232
Cables
58 - Connecting Serial Devices
This subsection discusses the following topics for the DeviceMaster with 9 serial
screw terminals.
•

Screw Terminal Connectors (9)

•

Screw Terminal (9) Null-Modem RS-232 Cables

• Screw Terminal (9) Null-Modem RS-422 Cables
• Screw Terminal (9) RS-232/485 Straight-Through Cables
• Screw Terminal (9) Loopback Signals
• Connecting Serial Devices
Use the following table or drawings for signal information.
RS-232†
RxD
RI
TxD
CD
DSR DTR CTS
RTS
† RS-232 ground must be connected to the signal ground terminal.
RS-232 CD
RS-422/RS-485
Full-Duplex N/A N/A N/A N/A
RS-485 Half-
N/A N/A N/A N/A
Duplex
† RS-232 ground must be connected to the signal ground terminal.
An RS-232 null-modem cable is required for connecting DTE devices.
CD
DCD DTR
1
DB9
8
DB25
DeviceMaster MOD | UP Hardware Installation and Configuration Guide: 2000630 Rev. B
on Page 58
on Page 59
on Page 60
RS-422
RS-485 Full-Duplex
RxD-
TxD-
Signal
Gnd
TxD+
DSR RI DTR TxD
TxD-
TRxD- TRxD+ N/A
RS-232 Null-Modem Cable
DSR RI DTR TxD
RI DSR RxD
4 9 6 2
20 22 6 3
on Page 58
on Page 59
on Page 59
RS-485 Half-Duplex
TRxD-
Signal
Gnd
RxD+ TRxD+
RTS RxD CTS
TxD+ RxD- RxD+ Sig Gnd
N/A
RTS RxD CTS Sig Gnd
CTS TxD RTS Gnd
8 3 7 5
5 2 4 7
Signal
Gnd
Sig Gnd
Sig Gnd