Siemens SINUMERIK 810DE powerline Equipment Manual page 32

2 Connection Conditions
2.1 Supplementary electrical conditions
These external devices may not be connected to the control during normal ope-
ration. However, if the system cannot be operated without them, then the cable
shields must be connected at both ends. Furthermore, the external device must
be connected to the control via an equipotential bonding cable.
Cable
Definition:
definitions
S
S
Rules for routing
In order to achieve the best possible noise immunity of the complete system
(control, power module, machine), the following EMC measures must be care-
cables
fully observed:
S
S
S
S
S
S
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Important
!
For further notes on interference suppression measures and the connection of
shielded cables, please refer to
References:
2-30
Signal cables (e.g.)
– Data cables (MPI, sensor cables, etc.)
– Binary inputs and outputs
– Emergency Stop cables
Load cables (e.g.)
– Low-voltage supply cables (230 V AC, +24 V DC etc.)
– Supply cables to contactors (primary and secondary circuit)
Signal cables and load cables must be routed at the greatest possible
distance from one another.
If necessary, signal and load cables may cross one another (if possible, at
an angle of 90°), but must never be laid close or parallel to one another.
Only cables provided by the manufacturer should be used as signal cables
from and to the CCU.
Signal cables may not be routed close to strong external magnetic fields
(e.g. motors and transformers).
Pulse-carrying HC/HV cables must always be laid completely separately
from all other cables.
If signal lines cannot be routed a sufficient distance away from other cables,
they must be installed in grounded cable ducts (metal).
The clearance (surface through which interference can be coupled-in)
between the following cables must be kept to a minimum:
– Signal cable and electrical circuit signal cable (twisted)
– Signal cable and associated equipotential bonding conductor
– Equipotential bonding conductor and PE conductor (routed together)
/EMV/, EMC Configuring Guidelines.
SINUMERIK 810D Equipment Manual Configuration CCU (PHC) – 03/2006 Edition
Copyright © Siemens AG 2006