Omega OME-ET-7000 Series User Manual page 14

Frame Ground
Electronic circuits are constantly vulnerable to Electrostatic Discharge (ESD),
which becomes worse in a continental climate area. The
OME-ET-7000/OME-PET-7000 series features a new design for the frame
ground that provides a path for bypassing ESD, allowing enhanced static
(ESD) protection capabilities and ensuring that the module is more reliable.
Choosing either of the following options will provide a better level of protection
for the module:
The OME-ET-7000/OME-PET-7000 has a metallic board attached to the back
of the plastic case, shown as "1" in the figure below.
When mounted to a DIN-Rail, connect the DIN-Rail to the earth ground
because the DIN-Rail is in contact with the upper frame ground, as shown as
"2" in the figure below.
Frame Ground
2
Frame Ground
1
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