GPS-721 User Manual
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GPS-721 User Manual V2.0, Oct. 2010
1.7 Frame Ground
Electronic circuits are constantly vulnerable to Electro-Static
Discharge (ESD), which becomes worse in a continental climate
area. Some I-7K and M-7K series modules feature a new design for
the frame ground, which provides a path for bypassing ESD,
allowing enhanced static protection (ESD) capabilities and ensures
that the module is more reliable. Either of the following options will
provide a better protection for the module:
1. If the module is DIN-rail mounted, connect the DIN rail to the
earth ground because the DIN rail is in contact with the upper
frame ground, as shown in the figure below.
2. Alternatively, connect the lower frame ground terminal to a wire
and connect the wire to the earth ground, as shown in the figure
below.
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