IPC/RSL8xxx-XxxxE: user documentation
DOC/IPC_RSL8-E; V1.9
© Syslogic Datentechnik AG, Switzerland, http://www.syslogic.com
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Fig. 14 Additional grounding of the cable shields at the entry point of a cabinet.
5.5.
Cabling of communication links
If the communication ports are unisolated ports, cable shields have to be connected to chassis
potential on both sides of the interconnection cable. If the cable is very long, a thick copper
wire (10 mm
2
) for potential adjustment is highly recommended.
Fig. 15 shows an non isolated system with common chassis ground.
Some of the communication ports are galvanically isolated ports. In such cases the shield of the
interconnection cable must be wired to chassis potential only on one side of the cable.
Fig. 16 shows an isolated system with independent grounds.
Important notes
Grounding of cable shields using "pig-tails wires" are not recommended because of
their high impedance at high frequencies. It is recommended to clamp the shields onto a
grounded copper-rail.
Chassis
Cables
nonisolated
shield
IIndustrial PC System
Clamping
screw
Cabinet
