VIPA PPC021 ES Manual page 53

Hmi

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VIPA HMI

HB160 | PPC | 67S-PNL0 | en | 18-18

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.

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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.

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.

Create a homogeneous reference potential and ground all electrical operating sup-

plies when possible.

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Please take care for the targeted employment of the grounding actions. The

grounding of the PLC serves for protection and functionality activity.

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Connect installation parts and cabinets with your PLC in star topology with the

isolation/protected earth conductor system. So you avoid ground loops.

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If there are potential differences between installation parts and cabinets, lay suffi-

ciently dimensioned potential compensation lines.

Basic rules for the EMC-equitable assembly of installations

Installation guidelines

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