n
Proof the correct fixing of the lead isolation.
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Data lines must be laid isolated.
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Analog lines must be laid isolated. When transmitting signals with small ampli-
tudes the one sided laying of the isolation may be favourable.
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Lay the line isolation extensively on an isolation/protected earth conductor rail
directly after the cabinet entry and fix the isolation with cable clamps.
–
Make sure that the isolation/protected earth conductor rail is connected impe-
dance-low with the cabinet.
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Use metallic or metallised plug cases for isolated data lines.
n
In special use cases you should appoint special EMC actions.
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Consider to wire all inductivities with erase links.
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Please consider luminescent lamps can influence signal lines.
n
Create a homogeneous reference potential and ground all electrical operating sup-
plies when possible.
–
Please take care for the targeted employment of the grounding actions. The
grounding of the PLC serves for protection and functionality activity.
–
Connect installation parts and cabinets with your PLC in star topology with the
isolation/protected earth conductor system. So you avoid ground loops.
–
If there are potential differences between installation parts and cabinets, lay suffi-
ciently dimensioned potential compensation lines.
VIPA HMI
Installation guidelines
Basic rules for the EMC-equitable assembly of installations
HB160 | PPC | 67P-PNL0 | en | 20-20
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