PROGRAMMABLE DISPLAY WHA1 Advanced Model
5
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
/485
1:1
communication
1:n
communication
RS-232C Communication
PLC RS-232C port
WHA1 Advanced Model
Fanction
Signal name
Pin No.
Pin name
Send data
SD
1
RX/RXD-
Receive data
RD
2
TX/TXD-
Signal ground
SG
3
CTS/RXD+
4
RTS/TXD+
5
+5V output
6
GND
7
-
8
SHIELD
RS-422 Communication
PLC RS-422 port
WHA1 Advanced Model
Fanction
Signal name
Pin No.
Pin name
Send data (+)
SD+
1
RX/RXD-
Send data (-)
SD
ー
2
TX/TXD-
Receive data (+)
RD+
3
CTS/RXD+
Receive data (-)
RD
ー
4
RTS/TXD+
5
+5V output
6
GND
7
-
8
SHIELD
RS-485 Communication
PLC RS-485 port
WHA1 Advanced Model
Fanction
Signal name
Pin No.
Pin name
RS-485(+)
+
1
RX/RXD-
RS-485(-)
ー
2
TX/TXD-
3
CTS/RXD+
4
RTS/TXD+
5
+5V output
6
GND
7
-
8
SHIELD
