2-12
VersaMax® Modules, Power Supplies, and Carriers User's Manual – March 2003
GFK-1504K
2
Installing Power and Ground Wiring
Power Supply terminals accommodate one AWG #14 (avg. 2.1mm
2
cross section) to
AWG #22 (avg. 0.36mm
2
cross section) wire, or two wires up to AWG #18 (avg. 0.86mm
2
cross section). Use copper wire rated for 90 degrees C. When inserting two wires in the
same position, the wires must be the same size and the same type (solid or stranded).
Connect the ground terminal to the conductive mounting panel with a 4-inch maximum
length of AWG #14 (avg. 2.1mm
2
) wire. Use hardware such as star washers to ensure
ground integrity.
Grounding DC Power Supplies
DC power supplies are non-isolated. DC- must be grounded to frame / earth ground. DC-
is grounded to frame internally in the Power Supply. As a result, floating power supplies
cannot be used.
DC+
DC-
Grounding AC Power Supplies
AC power supplies are isolated. Therefore, the AC source does not have to be grounded.
However, it is recommended to only use ground-referenced sources such as a neutral line
or grounded center-tap transformer.
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