Siemens SINAMICS S120 Equipment Manual page 451

these plates are part of the scope of supply of the components, or they are integrated in the
connector.
All cables inside the cabinet must be connected as closely as possible to parts connected
with cabinet ground, such as a mounting plate or cabinet wall. Ducts made of sheet steel or
routing cables between between steel sheets (e.g. between the mounting plate and back
wall) should provide adequate shielding.
Avoid, where possible, routing unshielded cables, connected to the drive line-up, in the
immediate vicinity of noise sources, e.g. transformers. Signal lines (shielded and unshielded)
connected to the drive line-up, must be routed as far as possible away from strong external
magnetic fields (e.g. transformers, line reactors). In both cases, a distance of ≥ 300 mm is
usually sufficient.
The Voltage Clamping Module conducts a high leakage current via the functional ground.
This means that a permanent PE connection must be provided for the cabinet (PE) rail.
Other than that the following measures must be taken in accordance with EN 61800-5-1:
Either protective ground conductor cross-sections ≥ 10 mm
protective ground conductor of the same cross-section as the first one.
Signal and DC power supply cables
Operating unshielded signal and direct current supply cables (e.g. 24 V infeed with external
supply):
● Direct current supply cables: Max. permissible length: 10 m
● Unshielded signal cables: Max. permissible length: 30 m (without additional wiring)
For greater lengths, suitable wiring must be connected by the user to provide overvoltage
protection. For example:
Table 8-11
DC supply
Weidmüller
Type No.: PU DS 24V 16A
Weidmüller GmbH & Co. KG
An der Talle 89
D-33102 Paderborn
Tel. +49 (0) 5252/960-0
Fax +49 (0) 5252/960-116
http://www.weidmueller.com
NOTICE
The connected signal and power cables must be routed to the components in such a way
that they do not cover the ventilation slots.
Booksize Power Units
Equipment Manual, (GH2), 07/2007, 6SL3097-2AC00-0BP5
8.5 Information about electromagnetic compatibility (EMC) and cable routing
DANGER
Recommendations for overvoltage protection
Cabinet Design and EMC Booksize
Cu or installation of a second
2
24 V signal cables
Weidmüller
Type No.: MCZ OVP TAZ
451