Com1 and com3 – NEXCOM NViS 3620 User Manual
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Copyright © 2013 NEXCOM International Co., Ltd. All Rights Reserved.
15
Chapter 2: External Connectors Pinout Description
NViS3620/3720 series User Manual
COM1 and COM3
Connector Number: 19
Pin
Definition
Pin
Definition
1
GND
2
GND
3
CTS
4
DSR
5
DTR
6
RXD
7
RI
8
RTS
9
TXD
10
DCD
1
5
6
9
COM2 (RS232/422/485)
Connector Number: 20
RS232 / RS422 / RS485 is selected in BIOS setting
Pin
Definition
Pin
Definition
1
GND
2
GND
3
CTS
4
DSR
5
DTR_RX-
6
RXD_TX+
7
RI_PWR
8
RTS
9
TXD_RX+
10
DCD_TX-
Pin
Definition
Pin
Definition
5
RX-
6
TX+
9
RX+
10
TX-
Pin
Definition
Pin
Definition
6
DATA+
10
DATA-
1
5
6
9
RS232 (Default)
RS422
RS485
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