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Manual VIPA System 300S SPEED7
Basic rules for
In the most times it is enough to take care of some elementary rules to
guarantee the EMC. Please regard the following basic rules when installing
EMC
your PLC.
• Take care of a correct area-wide grounding of the inactive metal parts
• When cabling, take care of the correct line routing.
• Proof the correct fixing of the lead isolation.
• In special use cases you should appoint special EMC actions.
• Create a homogeneous reference potential and ground all electrical
HB140E - PS - RE_307-1FB70 - Rev. 13/43
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Chapter 1 Assembly and installation guidelines
when installing your components.
- Install a central connection between the ground and the protected
earth conductor system.
- Connect all inactive metal extensive and impedance-low.
- Please try not to use aluminum parts. Aluminum is easily oxidizing
and is therefore less suitable for grounding.
- Organize your cabling in line groups (high voltage, current supply,
signal and data lines).
- Always lay your high voltage lines and signal res. data lines in
separate channels or bundles.
- Route the signal and data lines as near as possible beside ground
areas (e.g. suspension bars, metal rails, tin cabinet).
- Data lines must be laid isolated (for details see below).
- Analog lines must be laid isolated. When transmitting signals with
small amplitudes the one sided laying of the isolation may be
favorable.
- Lay the line isolation extensively on an isolation/protected earth con-
ductor rail directly after the cabinet entry and fix the isolation with
cable clamps.
- Make sure that the isolation/protected earth conductor rail is
connected impedance-low with the cabinet.
- Use metallic or metalized plug cases for isolated data lines.
- Wire all inductivities with erase links, which are not addressed by the
System SLIO modules.
- For lightening cabinets you should avoid luminescent lamps.
operating supplies when possible.
- Please take care for the targeted employment of the grounding
actions. The grounding of the PLC is a protection and functionality
activity.
- Connect installation parts and cabinets with the System SLIO in star
topology with the isolation/protected earth conductor system. So you
avoid ground loops.
- If potential differences between installation parts and cabinets occur,
lay sufficiently dimensioned potential compensation lines.
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