Figure 7 Com Ports - Quanmax KPC-15B0 User Manual

COM ports
COM ports with the pin definitions.
KPC-15B0/17B0 User's Manual
COM 1
COM 2
COM1~COM2 RS-232 / 422 / 485 Port DB-9
Pin RS-232
1 DCD
2 RXD
3 TXD
4 DTR
5 GND
6 DSR
7 RTS
8 CTS
9 +5V
COM3~COM4 RS-232 Port DB-9
Pin
1 DCD, Data carrier detect
2 RXD, Receive data
3 TXD, Transmit data
4 DTR, Data terminal ready
5 GND, ground
6 DSR, Data set ready
7 RTS, Request to send
8 CTS, Clear to send
9

Figure 7 COM ports

COM 3 COM 4
Half Duplex
RS-422
RS-485
TX- DATA-
RX+ N/A
TX+ DATA+
RX- N/A
GND GND
N/A N/A
N/A N/A
N/A N/A
+5V +5V
Signal
+5V
22
Chapter 2
Full Duplex
RS-485
TX-
RX+
TX+
RX-
GND
N/A
N/A
N/A
+5V