Watlow Silver Series EM - Manual (Page 9)

9 Watlow Silver Series OIT Installation Guide
Figure 2b: Chassis Ground Connection – TS00-0100-EM00 (HMI5100L)
Power Supply Selection
The power supply used to power the OIT should provide an output of
+24 VDC ±20% measured at the OIT power terminal block. A 24VDC
regulated power supply dedicated to the OIT is recommended. Use a
power supply with adequate current rating based upon your particular
model (visit the Support Center Specifications page on our website).
A power line filter installed at the AC input to the OIT power supply is
highly recommended as a safeguard against conducted RF noise, which
is often present on factory power lines. The wires connecting the output
of the power line filter to the power supply should be kept as short as
possible to minimize any additional noise pickup. The case of the power
line filter should be connected to a quiet earth ground. The power line
filter should have a current rating of at least 3 Amps with common mode
and differential mode attenuation. In applications that may have high
frequency noise present, we also recommend using a resistor (~1 MΩ)
Metal area on
panel free of
paint
Stud or screw
Green (FG)
Black (--)
Red (+)
Control Panel
(connected to
earth ground)
Frame
ground
0600-0101-0000 Rev A