PRS-7910
56 PRS-7910
Figure 11.7.1 MD_SOPT settings
11.7.3 Ground Connection on the Device
There is a ground terminal on the rear panel, and the ground braided copper strip can be
connected with it. Take care that the grounding strip is always as short as possible. The main thing
is that the device is only grounded at one point. Grounding loops from unit to unit are not allowed.
There are some ground terminals on some connectors of this relay, and the sign is “GND”. All the
ground terminals are connected in the cabinet of this relay.
11.7.4 Grounding Strips and their Installation
High frequency currents are produced by interference in the ground connections and because of
skin effect at these frequencies, only the surface region of the grounding strips is of consequence.
The grounding strips must therefore be of (preferably tinned) braided copper and not round copper
conductors, as the cross-section of round copper would have to be too large.
Proper terminations must be fitted to both ends (press/pinch fit and tinned) with a hole for bolting
them firmly to the items to be connected.
The surfaces to which the grounding strips are bolted must be electrically conducting and
non-corroding.
The following figure shows the ground strip and termination.
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