2.4.3
RS-232 Serial Port 3/ 4 Connector (CN19/CN20)
Pin
Signal
1
DCD (485-/422TX-)
3
TXD (422RX+)
5
GND
7
RTS
9
RI
2.4.4
Digital I/O Connector (CN20)
Pin
1
2
3
4
5
Chapter 2 – Hardware Information
Signal
GND
GPI Port 1
GPI Port 2
GPI Port 3
GPI Port 4
Pin
Signal
2
RXD (485+/422TX+)
4
DTR (422RX-)
6
DSR
8
CTS
10
Pin
Signal
6
+5V
7
GPO Port 5
8
GPO Port 6
9
GPO Port 7
10
GPO Port 8
20