Siemens PM240-2 Hardware Installation Manual page 52

Connecting-up
5.3 EMC-compliant installation
● Connect the shields to the grounded enclosure at both ends with a good electrical
connection through the largest possible surface area.
● Route incoming and outgoing cables/conductors within a zone (where unshielded single-
conductor cables are used), twisted or in parallel and as close to one another as possible.
● Ground any unused conductors of signal and data cables at both ends.
● Signal and data cables should enter the cabinet only at one point (e.g. from below).
Cables outside the control cabinet
● Route the power cables of the drive so that there is a minimum clearance of 25 cm to
signal and data cables.
● Use shielded motor cables.
● Use shielded signal and data cables.
● Route the shielded motor cable separately from the cables to the motor temperature
sensors.
Cable shields
● For shielded cables, only use cables with finely-stranded, braided shields.
● Connect the shield at the grounded enclosure as well as at the EMC shield bar.
– Connect the shields to the grounded enclosures through a large surface area at both
– Immediately after the cable enters the cabinet, connect the cable shields to the EMC
● If possible, always route the cable shields without any interruptions.
● Only use metallic or metallized connectors for the plug connections for shielded data
cables (e.g. PROFIBUS connection).
Further information
You can find additional information about the EMC installation guidelines under
(http://support.automation.siemens.com/WW/view/en/60612658):
52
ends of the cables to establish a low ohmic connection. Attach the shields to the
appropriate EMC shield bars.
shield bar through a larger surface area to establish a low ohmic conduction.
Hardware Installation Manual, 12/2015, A5E33294624B AD
Power Module PM240-2