Ri Suppression Measures - Siemens SINUMERIK 828D Manual

3.1.3

RI suppression measures

Shielded signal cables
In addition to the protective grounding of system components, special precautions must be
taken to ensure safe, fault-free operation of the system. These measures include shielded
signal cables, special equipotential bonding, isolation, and shielding measures.
● For safe and fault-free operation of the system, the specified cables must be used.
● For digital signal transmission, the shield must have a conductive connection at both
Cable definitions
The following cables are permissible:
● Signal cables:
● Power cables:
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:
● Signal cables and power cables must be routed at the greatest possible distance from
● If necessary, signal and power cables may cross one another (if possible at an angle of
● Signal cables may not be routed close to strong external magnetic fields (e.g. motors and
● Pulse-loaded HC/HV lines must always be laid completely separately from all other lines.
PPU
Manual, 03/2013, 6FC5397-2DP40-3BA1
sides of the housing.
Exception:
Standard shielded cables grounded on only one side can be used for devices from other
manufacturers (printers, programming devices, etc.). However, these devices must not be
connected to the controller during normal operation. However, if the system cannot
operate without them, then the cable shields must be connected at both ends.
Furthermore, the non-Siemens device must be connected to the controller via an
equipotential bonding cable.
– Data cables (Ethernet, PROFINET, DRIVE-CLiQ, sensor cables, etc.)
– Ribbon cables for digital inputs/outputs
– Emergency Stop cables
– Low-voltage supply cables (230 VAC, 24 VDC, etc.)
– Supply cables to contactors (primary and secondary circuit)
one another.
90°), but must never be laid close or parallel to one another.
transformers).
Application planning
3.1 Secondary electrical conditions
37