NEXCOM VTC 6120 - Manual (Page 23)

Copyright © 2011 NEXCOM International Co., Ltd. All Rights Reserved. 9 VTC 6120 User Manual
Chapter 1: Product Introduction
RS232/485 Connector COM3
The 9 pin D-Sub COM 3 port can be configured as RS232 or RS485 using
the SW6 dip switch.
Connector size: DSUB-9 PIN
Connector location
Connector pin definition
PIn Definition Pin Definition
1 DCD (RS232)
TX-/RX- (RS485) 2 RXD (RS232)
TX+/RX+ (RS485)
3 TXD (RS232) 4 DTR (RS232)
5 GND 6 DSR (RS232 )
7 RTS (RS232) 8 CTS (RS232)
9 RI (RS232)
RS232 Connector COM1 and COM2
Connector size: DSUB-9 PIN
Connector location
Connector pin definition
PIn Definition Pin Definition
1 DCD 2 RXD
3 TXD 4 DTR
5 GND 6 DSR
7 RTS 8 CTS
9 RI
1 5
6 9
1 5
6 9