Introduction
EPM-PS1 Reference Manual
5
T
RANSIENT
V
OLTAGE
S
UPPRESSION
(TVS)
D
EVICES
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
lef
t mounting hole, as
shown in Figure 2. All other mounting holes are floating. Use metal standoffs or a grounding
strap to connect the lower
lef
t mounting hole to the enclosure chassis, which should be
connected to earth ground.
Figure 2. Attaching the EPM-PS1 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