C1120 S5 to II/O-Lightbus Interface
Beckhoff II/O-Lightbus System
Page 52 of 52
Version 2.1
Date 27.06.97
5
C1120 Serial Port Pinout
Pinout of RS232 C / current loop port
(9-pin SUB-D connector on front of C1120)
Pin
Signal
Port
1
TXD
RS232 C COM2:
2
TXD
RS232 C COM1:
3
RXD
RS232 C COM1:
4
RXD
RS232 C COM2:
5
Signal
GND
-
6
TXD
20mA+ COM1:
7
TXD
20mA- COM1:
8
RXD
20mA+ COM1:
9
RXD
20mA- COM1: