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Connection
4.2 Notes on grounding the data cable for use with the PROFINET Proxy SPP2000
PROFINET Proxy SPP2000
Equipment Manual, 03/2022, L1V30814715D-01
19
4.2
Notes on grounding the data cable for use with the PROFINET
Proxy SPP2000
Note
The upper limit values will be exceeded if the cable is not grounded
Compliance with the technical limit values for noise radiation (CISPR11, class B) and noise
immunity is only guaranteed if the cable is correctly grounded. The operator of the system is
responsible for ensuring compliance with the statutory limit values (CE mark).
Make a shield connection on both sides as described here.
Ethernet cable
The Ethernet cable must be grounded in the vicinity of the basic device for data transmission
according to the Fast Ethernet standard.
Type of shield grounding
To do this, expose the foil shield of the data cable. Connect the exposed shield to a suitable
grounding point on the control cabinet, preferably a shielding bus.
•
Be careful not to damage the foil shield of the cable when removing the cable jacket.
•
Fasten the exposed shield with a metal cable clamp or alternatively with a hose tie. The
clamp must clasp around a large portion of the shield and provide good contact.
•
To allow good contact, a tin-plated or galvanically stabilized surface is ideal.
With galvanized surfaces, the contact should be achieved using suitable screw
connections. A painted surface at the contact point is not suitable.
Note
Loss of contact if the shield connection is incorrectly used for strain relief
If the shield connection is used for strain relief, the grounding contact can deteriorate or
be completely lost.
Don't use the contact point on the cable shield for strain relief.
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