Table of Contents
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Chapter 2: Jumpers and Connectors
COM2 Port
Connector type: DB-9 port, 9-pin D-Sub
Connector location: CN3
1
5
6
9
RS232
Pin
Definition
Pin
1
SP2_DCD
1
2
SP2_RXD
2
3
SP2_TXD
3
4
SP2_DTR
4
5
GND
5
6
SP2_DSR
6
7
SP2_RTS
7
8
SP2_CTS
8
9
SP2_RI
9
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RS485
RS422
Definition
Pin
Definition
SP2_DATA-
1
SP2_TX-
SP2_DATA+
2
SP2_TX+
NC
3
SP2_RX+
NC
4
SP2_RX-
GND
5
GND
NC
6
SP2_RTS-
NC
7
SP2_RTS+
NC
8
SP2_CTS+
NC
9
SP2_CTS-
COM3 Port
Connector type: DB-9 port, 9-pin D-Sub
Connector location: CN2
1
5
6
Pin
Definition
1
SP3_DCD
3
SP3_TXD
5
GND
7
SP3_RTS
9
SP3_RI
18
9
RS232
Pin
Definition
2
SP3_RXD
4
SP3_DTR
6
SP3_DSR
8
SP3_CTS
NISE 105U User Manual
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