User manual

PPC-4211W User Manual 22
3.2 External COM Port Pin Definition
Figure 3.2 COM ports
COM 1 and COM 2 (RS232, pin9 supports 5 V/12 V output)
COM 3 and COM 4 (RS232)
COM 5 RS-422/485
COM1-4:
Pin9 is set as RI signal in COM port by default, and could be set as 5V/12V output
by Jumper
Note! COM4 doesn’t support RING function.
Pin COM1 / COM2 COM3 / COM4
1 DCD DCD
2RXDRXD
3TXDTXD
4DTRDTR
5GNDGND
6DSRDSR
7RTSRTS
8CTS CTS
9 RING or 5V/12V output RING (Only COM3)
COM1~4 COM5