Serial I/O
VL-EPU-4562/4462 Reference Manual
45
Serial Port Connector Pinout
Table 12: COM1/COM2 Connector Pinout
Pin
RS-232 Signal
RS-422/RS-485
Signal
Port
1
RTS1
TXD1_P
COM1
2
TXD1#
TXD1_N
3
CTS1
RXD1_P
4
RXD1#
RXD1_N
5
GND
GND
—
6
RTS2
TXD2_P
COM2
7
TXD2#
TXD2_N
8
CTS2
RXD2_P
9
RXD2#
RXD2_N
10
GND
GND
—
Table 13: COM3/COM4 Connector Pinout
Pin
RS-232 Signal
RS-422/RS-485
Signal
Port
1
RTS3
TXD3_P
COM3
2
TXD3#
TXD3_N
3
CTS3
RXD3_P
4
RXD3#
RXD3_N
5
GND
GND
—
6
RTS4
TXD4_P
COM4
7
TXD4
TXD4_N
8
CTS4
RXD4_P
9
RXD4#
RXD4_N
10
GND
GND
—
Cabling
An adapter cable, part number CBR-1014, is available for routing the serial I/O signals to 9-pin
D-sub connectors. This is a 12-inch, Pico-Clasp 10-pin to two 9-pin D-sub connector cable.