Com3 and com4 ports – NEXCOM NISE 2200 User Manual
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Copyright © 2012 NEXCOM International Co., Ltd. All Rights Reserved.
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NISE 2200 User Manual
Chapter 2: Jumpers and Connectors
COM3 and COM4 Ports
Connector type: DB-9 port, 9-pin D-Sub
Connector location: COM1A (COM3) and COM1B (COM4)
COM3 Connector Pin Definition
RS232
RS485
RS422
Pin
Definition
Pin
Definition
Pin
Definition
1
SP3_DCD
1
SP3_DATA-
1
SP3_TX-
2
SP3_RXD
2
SP3_DATA+
2
SP3_TX+
3
SP3_TXD
3
NC
3
SP3_RX+
4
SP3_DTR
4
NC
4
SP3_RX-
5
GND
5
GND
5
GND
6
SP3_DSR
6
NC
6
SP3_RTS-
7
SP3_RTS
7
NC
7
SP3_RTS+
8
SP3_CTS
8
NC
8
SP3_CTS+
9
SP3_RI
9
NC
9
SP3_CTS-
RS232
RS485
RS422
Pin
Definition
Pin
Definition
Pin
Definition
1
SP4_DCD
1
SP4_DATA-
1
SP4_TX-
2
SP4_RXD
2
SP4_DATA+
2
SP4_TX+
3
SP4_TXD
3
NC
3
SP4_RX+
4
SP4_DTR
4
NC
4
SP4_RX-
5
GND
5
GND
5
GND
6
SP4_DSR
6
NC
6
SP4_RTS-
7
SP4_RTS
7
NC
7
SP4_RTS+
8
SP4_CTS
8
NC
8
SP4_CTS+
9
SP4_RI
9
NC
9
SP4_CTS-
COM4 Connector Pin Definition
COM 3
1
5
6
9
COM 4
1
5
6
9