Siemens Sinumerik 840 sl Configuration Manual

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2.1 Secondary electrical conditions
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E Siemens AG, 2002. All rights reserved
SINUMERIK 810D Manual Hardware Configuration (PHC) -- 11.02 Edition
2.1.5 RI suppression measures
In addition to the protective earthing of system components, special precautions
must be taken to guarantee safe, interference-free operation of the system.
These measures include shielded signal cables, special equipotential bonding
and earthing conductors.
Only use the cables specified in the individual diagrams to ensure safe
interference-free operation of the system.
For digital signal transmission, the shield must have a conductive connection to
both sides of the housings.
Exception:
S Standard screened cables grounded on only one side can be used for
devices of other makes (printers, programming devices, etc.).
These devices must, however, not be connected to the control during
normal operation. Whenever operation with devices of other makes is
unavoidable, the shields must be connected to both housing sides. In cases
like this, the device must additionally be connected to the control by means
of an equipotential bonding conductor.
Definition:
S Signal cables (e.g.)
-- Data cables (MPI, sensor cables, etc.)
-- Binary inputs and outputs
-- Emergency Stop cables
S Load cables (e.g.)
-- Low-voltage supply cables (230VAC, +24VDC etc.)
-- Supply c ables to conductors (primary and secondary circuit).
References: /EMC/ SINUMERIK, SIROTEC, SIMODRIVE
EMC Installation Guideline
Comply with the following EMC measures to achieve the best--possible noise
immunity for the complete system (control, power section, machine):
S The largest possible clearance must be left between signal and load cables.
S 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.
S Only cables offered by the NC manufacturer should be used as signal
cables from and to the NC or PLC.
S Signal cables must not be routed close to strong external magnetic fields
(e.g. motors and transformers).
S Pulse-loaded heavy current/high voltage cables must always be laid
completely separate from all other cables.
Shielded
signal cables
Cable
definitions
Installation
specifications
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11.02

Siemens Sinumerik 840 sl Specifications

General

Brand	Siemens
Model	Sinumerik 840 sl
Category	Control Unit
Language	English