Compact Board PCM-9452
Chapter 2 Quick Installation Guide 2-19
9 RIA 10 N/C
2.34 COM Port 2 Connector (CN19)
COM2 RS-232 Mode
Pin Signal Pin Sig nal
1 DCDB 2 RXB
3 TXB 4 DTRB
5 Ground 6 DSRB
7 RTSB 8 CTSB
9 RIB / +5 Volt. / +12 Volt. 10 N/C
COM2 RS-422 Mode
Pin Signal Pin Sig nal
1 TXD- 2 RXD+
3 TXD+ 4 RXD-
5 Ground 6 N/C
7 N/C 8 N/C
9 N/C / +5 Volt. / +12 Volt. 10 N/C
COM2 RS-485 Mode
Pin Signal Pin Sig nal
1 TXD- 2 N/C
3 TXD+ 4 N/C
5 Ground 6 N/C
7 N/C 8 N/C
9 N/C / +5 Volt. / +12 Volt. 10 N/C