Maple Systems OMI5100A-CE - Manual (Page 8)

8 OMI5000 Series Installation Guide
1010-1013 Rev 01 www.maplesystems.com
Cable Routing and Noise Immunity
Follow these guidelines when routing cables to the OMI:

Always route the OMI communication cable and the power cable
away from any AC voltage or rapidly switching DC control
lines.

Never bundle the OMI cables together with 120VAC power
wires or with relay wiring.

Try to keep at least 8 inches (20 cm) of separation between the
OMI cables and other power wiring. If voltages greater than
120VAC are used in the system, greater separation is required.

If the OMI cables must come near AC wiring, make sure they
cross at 90 degrees.

Run AC power wires in a separate grounded conduit to reduce
electrical noise interference.

Keep the cable lengths for the OMI as short as possible. Do not
coil excess cable and place it next to AC powered equipment.

Cover any equipment used in the enclosure that operates at high
frequency or high current levels with a grounded metal shield.
Installation
It is necessary to follow all installation procedures described in this
chapter for electrical noise immunity and CE compliance.
Your Maple Systems OMI is designed to connect easily to your
Controller. External rear connectors provide quick connections for
power, communications and programming wiring.
Connect the OMI to Power
Use the separate 3-position terminal block supplied with the OMI to
provide power to the OMI.
The power cable for the OMI should be 18AWG, 2-conductor wire with
a shield drain wire and protective shield (foil/braid). You may buy cable