59 PCM-9587 User Manual
Appendix B Pin Assignments
B.19 COM Port Connector (CN21)

Table B.19: COM Port Connector (CN21)

Pin Signal Pin Signal
1 COM1 DCD 2 COM1 DSR
3 COM1 RX 4 COM1 RTS
5 COM1 TX 6 COM1 CTS
7 COM1 DTR 8 COM1 RI
9GND 10GND
11 COM2 DCD/485TX- 12 COM2 DSR
13 COM2 RX /485TX+ 14 COM2 RTS
15 COM2 TX /485RX+ 16 COM2 CTS
17 COM2 DTR/485RX- 18 COM2 RI
19 GND 20 GND
21 COM3 DCD 22 COM3 DSR
23 COM3 RX 24 COM3 RTS
25 COM3 TX 26 COM3 CTS
27 COM3 DTR 28 COM3 RI
29 GND 30 GND
31 COM4 DCD 32 COM4 DSR
33 COM4 RX 34 COM4 RTS
35 COM4 TX 36 COM4 CTS
37 COM4 DTR 38 COM4 RI
39 GND 40 GND