Siemens SINUMERIK 840D sl Manual page 32

Application planning
4.1 Secondary electrical conditions
Shielded signal lines
● For safe and smooth operation of the system, the specified cables must be used. Please
● For digital signal transmission, the shield must have a conductive connection at both sides
Cable definitions
● Signal cables (example)
● Power cables (example)
Rules for routing cables
In order to maximize noise immunity for the complete system (controller, power section,
machine) the following EMC measures must be observed:
● A minimum distance of 200 mm is to be observed between the signal lines and power cables.
● If necessary, signal and load cables may cross one another (if possible, at an angle of 90°),
● Only use cables approved by Siemens for the signal lines from and to the NCU.
● Signal cables may not be routed close to strong external magnetic fields (e.g., motors and
● If signal lines cannot be routed a sufficient distance away from other cables, they must be
Note
For more specifications regarding interference suppression measures and connection of
shielded cables, see
References
Configuration Manual, EMC Guidelines
32
refer to the chapter titled Connection.
of the housing.
– Data cables (Ethernet, PROFIBUS, PROFINET, sensor cables, etc.)
– Digital inputs/outputs
– EMERGENCY OFF lines
– Supply voltage 1 x 230 V AC or 3 x 400 V AC
– Motor cables
but must never be laid close or parallel to one another.
transformers).
installed in grounded cable ducts (metal).
NCU 7x0.3 PN, NCU 7x0.3B PN
Manual, 06/2014, 6FC5397-1EP40-5BA1