Rockwell Automation 1771-DMC_DMC1_DMC4_DXPS Control Coprocessor User Manual - Manual (Page 274)

Appendix
C
C-1
Cable Connections
This appendix provides pin assignments for ports on the main module
and the serial expander module. This appendix also provides cable
configurations for connecting some personal computers to the 9-pin
and 25-pin ports.
Table C.A provides the pin assignments for the 9-pin COMM0 (/term)
port on the control-coprocessor main module. Figure C.1 and Figure C.2
show cable configurations for connecting either a 9-pin or 25-pin
communication port of a personal computer to the control-coprocessor
main module 9-pin port.
Table C.A
Pin Assignment for 9ĆPin COMM0 (/term) Port
Pin Signal Pin Signal Pin Signal
1 DCD 4 DTR 7 RTS
2 RxD 5 Signal GND 8 CTS
3 TxD 6 DSR 9 No Connect
Cable Length Requirements
Communication for the COMM0 port complies with EIA RS-232C
requirements. For all available transmission rates, you can use a cable
with a maximum length up to 15 m (50 ft).
Cable Configurations
See Figure C.1 and Figure C.2 for cable configurations for the
COMM0 port.
Appendix Objectives
Connecting to the 9ĆPin
COMM0 (/TERM) Port