Honeywell NetAXS NX4L1 Installation Manual page 82

RS-485 Wiring for a Mixed Loop
Figure B-3: RS-485 Wiring for a Mixed Loop
Using twisted pair, the first pair (usually red and black wires) is connected to 485+
and 485– respectively. The second pair (usually green and white) are twisted together
and connected to COM with the exception of the NetAXS-123 controller where the
common is bypassed.
In the above figure, the white wire is colored purple for easy viewing.
Note:
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NetAXS-4
1 2 3
NetAXS-4
1 2 3
Ground Shield
DO NOT CONNECT
OR GROUND
SHIELD
1
VDC Out
2
+485 (A)
3
–485 (B)
4
COM
5
+24 VDC In
Ground Shield
DO NOT CONNECT
OR GROUND SHIELD