Advantech 5000 Series - Manual (Page 237)

Quick Start Example
network with long cables, we advise the use of thicker wire to limit the
line voltage drop. In addition to serious voltage drops, long voltage
lines can also cause interference with communication wires.
+
POWER SUPPLY
+10~+30 VDC
-
+Vs
GND
INIT*
COM
DATA+
DATA-
Figure A-1 Power supply connections
It is advisable to use standard coding colors for the power lines:
+Vs (R) Red
GND (B) Black
Communication Wiring
It is recommended that shielded, twisted-pair cables that comply with
the EIA RS-485 standard be used with the ADAM-5000 network to
reduce interference. Only one set of twisted-pair cables is required
to
A-4 ADAM-5000