13. Technical Appendix - Interfaces
V Panel Express –User’s Guide (V1.01)
13.4.
Serial Port (COM4) RS422 (Option)
Pin Signal Name
9-pin D-SUB Plug (optional male or female)
1
TXD- (Transmit Data -)
2
RXD+ (Receive Data +)
3
TXD+ (Transmit Data +)
4
RXD- (Receive Data -)
5 GND (Signal
Ground)
6
RTS- (Request to Send -)
7
RTS+ (Request to Send +)
8
CTS+ (Clear to Send +)
9
CTS- (Clear to Send -)
13.5.
Serial Port (COM4) RS485 (Option)
Pin Signal Name
9-pin D-SUB Plug (optional male or female)
1
TXD- (Transmit Data -)
2
RXD- (Receive Data -)
3 NC
4 NC
5 GND (Signal
Ground)
6
TXD+ (Transmit Data +)
7
RXD+ (Receive Data +)
8 NC
9 NC
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