Figure 7-2 Earthing (Grounding) Cable Screens (Shields) When Multiple Sections Are Used - Siemens SINAMICS PERFECT HARMONY GH180 Operating Instructions Manual

Electrical Connections
7.4 EMC Installation Guidelines
Figure 7-2
Alternatively, if the drive is solidly bonded to an earthing (grounding) grid located directly
beneath it, the cable screens (shields) can be earthed (grounded) at both ends, preferably using
lead lengths less than 24 inches. If multiple sections are spliced together to form one single
cable, the screen (shield) of each section can be earthed (grounded) at both ends of each
section.
Filtering
An internal EMC line filter is installed in the drive on the customer control power inputs. The
customer's control power connections to the drive must be in metallic tubing and must not be
in close proximity with the internal EMC line filter.
Wiring
Control and Signal Cables
The control cabling is a part of the Faraday Cage as described in the screening section above.
• Use shielded cables for all analog and digital control connections whenever possible. Twisted
pairs are an effective alternative to shielded cables.
• If twisted pairs are used the twist should be carried as close as possible to the appropriate
terminals. If possible avoid the use of a common return for different analog signals.
• Always separate digital and analog signals. Never mix 110 / 230 Volt signals in the same cable
as 24 Volt signals. A conventional screened or armored cable should be used for 110 / 230 V
signals.
• Double-shielded cables will give the best performance.
• Control and signal cables must be separated from power cables.
44
Earthing (Grounding) cable screens (shields) when multiple sections are used
Type 6SR5 Air-Cooled
Operating Instructions, AK, A5E39390112