Watlow Silver Series EM - Manual (Page 10)

10 Watlow Silver Series OIT Installation Guide
and capacitor (~4700 pF) in parallel to clean earth ground on the DC
output of the power supply.
Do not use the power supply used to provide power to the OIT to power
switching relays, solenoids, or other active devices.
Figure 3: Power Line Filter Connection
Cable Routing and Noise Immunity
Follow these guidelines when routing cables to the OIT:
• Always route the OIT communication cable and the power cable
away from any AC voltage or rapidly switching DC control
lines.
• Never bundle the OIT cables together with 120VAC power wires
or with relay wiring.
• Try to keep at least 8 inches (20 cm) of separation between the
OIT cables and other power wiring. If voltages greater than
120VAC are used in the system, greater separation is required.
• If the OIT 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 OIT as short as possible. Do not
0600-0101-0000 Rev A