EPM-PS1 Datasheet, PDF (9/22 Pages) List of Unclassifed Manufacturers – The EPM-PS1 is a DC switching power supply designed for high reliability in a wide variety of applications.

Introduction
TRANSIENT VOLTAGE SUPPRESSION (TVS) DEVICES
The EPM-PS1 circuitry is protected from spike and surge damage by on-board transient voltage
suppression (TVS) devices. In order for the TVS devices to function properly, they must be
connected to earth ground. This connection is made at the board’s lower left mounting hole, as
shown in Figure 2. All other mounting holes are floating. Use metal standoffs or a grounding
strap to connect the lower left mounting hole to the enclosure chassis, which should be
connected to earth ground.
Only the lower left mounting hole
connects to the TVS devices. This
hole must be connected to earth for
TVS protection to function.
EPM-PS1
Figure 2. Attaching the EPM-PS1 to Earth Ground
EPM-PS1 Reference Manual
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