Appendix A3. Wiring diagrams for extension devices
ENIP-2, manual, ENIP.411187.002. Rev. 11.2020
60
Appendix A3. Wiring diagrams for extension devices
Connection via RS-485:
A
(d
ata
+)
B
(d
ata
-)
G
N
D
A
(d
ata
+)
B
(d
ata
-)
G
N
D
22
23
21
A
(d
ata
+)
B
(d
ata
-)
G
N
D
22
23
21
A
(d
ata
+)
B
(d
ata
-)
G
N
D
22
23
21
Master (IEC 60870-5-
101/Modbus RTU)
ENIP-2 RS-485-1
ENIP-2 RS-485-1
ENIP-2 RS-485-1
A
(d
ata
+)
B
(d
ata
-)
G
N
D
A
(d
ata
+)
B
(d
ata
-)
G
N
D
7
8
5
A
(d
ata
+)
B
(d
ata
-)
G
N
D
7
8
5
A
(d
ata
+)
B
(d
ata
-)
G
N
D
7
8
5
Master (IEC 60870-5-
101/Modbus RTU)
ENIP-2
RS-485-2, RS-485-3
ENIP-2
RS-485-2, RS-485-3
ENIP-2
RS-485-2, RS-485-3
Ground shield
Twisted pair
(Data+(A) and Data-(B))
Figure
А
3.1. RS-485 connection