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Connector Wiring Details 39
ACU16-C & NHB32-C Owner’s Manual
ENGLISH
ACU16-C RS-485 Port (RJ-45)
Cable Wiring Details
Although only pins 4, 5, 7, and 8 are used, all pins should be terminated properly, so connect
all eight pins even though only four are actually used.
ACU16-C/NHB32-C CobraNet Ports (100Base-TX Ethernet, RJ-45)
Straight/Crossed Cable Wiring Details
The pin wiring for crossed cables is shown in parenthesis. Although pins 4, 5, 7, and 8 are
unused, they must be terminated properly, so connect all eight pins even though only four
are actually used.
Pin Connection
1
Unused
2
Unused
3
Unused
4
RxD/TxD+
5
RxD/TxD–
6
Unused
7
GND
8
GND
Pins
1 —— 1
2 —— 2
3 —— 3
4 —— 4
5 —— 5
6 —— 6
7 —— 7
8 —— 8
Pin Connection
1
TxD+
2
TxD–
3
RxD+
4
Unused
5
Unused
6
RxD–
7
Unused
8
Unused
Pins
1 —— 1 (3)
2 —— 2 (6)
3 —— 3 (1)
4 —— 4
5 —— 5
6 —— 6 (2)
7 —— 7
8 —— 8