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Siemens Commissioning Guide CM1G5192en
Building Technologies 4 EMC-compatible installation of SED2 29.07.2010
• Connect movable parts (e.g. control cabinet doors or
hinged frames) via flexible grounding mesh
• Connect grounding to earth via protective conductors since, even in the event of fault, grounding must not carry
hazardous voltage
• Avoid earth loops
4.4.2 Routing the cables
• Lay cables of different power sections, such as control, mains and motor cables, separately
• Avoid undesired coupling caused by parallel running control, power and motor cables
• Lay control, mains and motor cables separately, in separate cable ducts at a distance of at least 200 mm (see
illustration below). If cables must be crossed, run them at an angle of 90° if possible
90°
> 40 cm > 20 cm
> 20 cm
5192Z37en
Motor cable
Mains cable
Signal cable
Signal / control cable
• Keep cables to motors as short as possible, generally not exceeding 25 m
• If possible, lay external cables in sheet metal ducts or on metal carriers. The metal cable duct or carrier should
be earthed and its individual parts should be galvanically connected
• If it is not possible to run control, power and motor
cables separately in separate cable ducts or cable
carriers, the cable duct or carrier must at least have
metallic galvanically conductive partitions
Metal partition
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Motor cable
Signal and
control cables
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