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Operation
optoNCDT ILR 1181 / 1182
6.1
RS232
Initially, RS232 communication interfaces purely functioned as PC communication ports. They have become
the established standard tool for serial data transmission over short cable lengths. With greater transmission
the interface is highly susceptible to interferences, notably, in the vicinity of strong electromagnetic noise
emitters.
Therefore, it should only be used for sensor configuration.
Parameter
- Baud rate: 9.6 kBaud (2.4 / 4.8 / 19.2 / 38.4)
- Start/Stop bit: 1
- Data bits: 8
- Handshake: none
- Parity: none
- Protocol: ASCII
Properties:
- Maximum input voltage RxD = ±25 V
- Output voltage TxD = 5 V
U
V
GND
2
TxD>>
<<RxD
GND
3
Shield
red/blue
red
violet
brown
white
5
Fig. 10 Diagram of RS232 wiring at 9-pole D-Sub female cable connector
U
V
GND
2
TxD >>
<<RxD
GND
3
Shield
red/blue
red
violet
brown
white
7
Fig. 11 Diagram of RS232 wiring at 25-pole D-Sub female cable connector
i
The RS232 interface is popular in industrial applications. Use an adequate USB TO RS232 converter in
the case of your PC/ notebook is just equipped with USB interfaces.
