8 Installation
PCS-9785 Satellite-Synchronized Clock
8-6
Date: 2019-07-05
Figure 8.7-2 Device ground terminal
8.7.4 Grounding Strips
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.
Braided
copper strip
Press/pinch fit
cable terminal
Terminal bolt
Contact surface
Figure 8.7-3 Ground strip and termination
8.7.5 Wiring Guideline
There are several types of cables that are used for connection of this device. Recommendation of
cable is:
Grounding: braided copper cable, 2.5mm
2
~ 6.0mm
2
Power supply, binary inputs & outputs: stranded conductor, 1.0mm
2
~ 2.5mm
2
Serial communication: 4-core shielded cable
Ethernet communication: 4-pair twisted shielded cable (category 5E)
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