User Manual

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Pin Assignments and Cable Wiring
Pin Assignments (NPort 6610/6650)
Pin RS-232
RS-422,
4-wire RS -485
2-wire RS-485
1
DSR
–
–
2
RTS
TxD+
–
3
GND
GND
GND
4
TxD
TxD-
–
5
RxD
RxD+
Data+
6
DCD
RxD-
Data-
7
CTS
–
–
8
DTR
–
–
Pin Mapping for RS-232 Cables (NPort 6610/6650)
NPort6610/6650
Serial Device
RJ45
DB9(M)
DB9(F)
DB25(M)
DB25(F)
DSR
1
6
4
6
20
DTR
RTS
2
7
8
4
5
CTS
GND
3
5
5
7
7
GND
TxD
4
3
2
2
3
RxD
RxD
5
2
3
3
2
TxD
DCD
6
1
1
8
8
DCD
CTS
7
8
7
5
4
RTS
DTR
8
4
6
20
6
DSR
Pin Mapping for RS-422/4W-RS-485 Cables (NPort 6650)
NPort 6650
Serial Device
RJ45
DB9(M)
DB9(F)
DB25(M)
DB25(F)
TxD+
2
7
8
4
5
RxD+
GND
3
5
5
7
7
GND
TxD-
4
3
2
2
3
RxD-
RxD+
5
2
3
3
2
TxD+
RxD-
6
1
1
8
8
TxD-
Pin Mapping for 2W-RS-485 Cables (NPort 6650)
NPort 6650
Serial Device
RJ45
DB9(M)
DB9(F)
DB25(M)
DB25(F)
GND
3
5
5
7
7
GND
Data+
5
2
3
3
2
Data+
Data-
6
1
1
8
8
Data-