Filter
Top Products
34 PCM-6890B User Manual
Serial ports (CN16)
The PCM-6890B offers four serial ports, three RS-232 and one RS-
232/422/485. These ports allow you to connect them to serial
devices (mouse, printers, etc.).
COM 1-4 RS-232/422/485 serial ports (CN16)
COM1, COM2, COM3, COM4 RS-232/422/485 serial port
PIN SIGNAL PIN SIGNAL
COM1 1 DCDa 2 DSRa
3 RXDa 4 RTSa
5 TXDa 6 CTSa
7 DTRa 8 RIa
9 GND 10 N.C.
COM2 11 DCDb 12 DSRb
(422TXD-/485DATA-)
13 RXDb 14 RTSb
(422RXD+)
15 TXDb 16 CTSb
(422TXD+/485DATA+)
17 DTRb 18 RIb
(422RXD-)
19 GND 20 N.C.
COM3 21 DCDc 22 DSRc
23 RXDc 24 RTSc
25 TXDc 26 CTSc
27 DTRc 28 RIc/+5V/+12V
29 GND 30 N.C.
COM4 31 DCDd 32 RSRd
33 RXDd 34 RTSd
35 TXDd 36 CTSd
37 DTRd 38 RId/+5V/+12V
39 GND 40 N.C.