3-4 VersaMax Modules, Power Supplies and CarriersUser's Manual GFK-1504N
3
Wiring
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.
For agency compliance, external MOV suppression is required from both the
positive and negative inputs to frame ground or at the power line input of a
system enclosure. (Refer to chapter 2.) MOV protection across the inputs is
provided on the supply and not necessary to add externally.