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PROGRAMMABLE DISPLAY WHS1 Standard Model
4
2.4 Serial Port
The serial port is used to communicate with the PLC or with another type of controller.
Standards available for the signals in the PLC port connector are: RS-232, RS-422, and RS-485.
The serial port is software programmable.
Make sure you select the appropriate interface in the programming software.
To operate in RS485 pins 3-4 and 7-8 must be connected externally.
To connect to the serial port, use a commercially available D-Sub 9-pin male connector.
2.4.1 Wiring Example of Serial Port
Use a loose wire for the connection on the PLC side.
It can be used in combination with our PLC equipped with an adaptive interface.
Serial
Configuration
RS-232C
1:1
communication
RS-422/
RS-485
1:1
communication
1:n
communication
Pin
No.
Pin name
Serial
RS-232C
RS-422
RS-485
1
GND
SG
-
-
2
-
-
-
-
3
TX/TXD-
TxD
TXD-
TXD-
4
RX/RXD-
RxD
RXD-
RXD-
5
-
-
-
-
6
+5V output
-
-
-
7
CTS/RXD+
CTS
RXD+
RXD+
8
RTS/TXD+
RTS
TXD+
TXD+
9
-
-
-
-