Siemens SINAMICS S120 Equipment Manual page 326

Cabinet Design and EMC
14.5 Electromagnetic Compatibility
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 14-10 Recommendations for overvoltage protection
DC supply
Weidmüller
Type No.: PU DS 24V 16A
Weidmüller GmbH & Co. KG
An der Talle 89
33102 Paderborn
Tel. 05252/960-0
Fax 05252/960-116
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.
CAUTION
Unshielded signal cables must not be routed parallel to power cables.
326
24 V signal cables
Weidmüller
Type No.: MCZ OVP TAZ
Booksize cold-plate power units
Manual, (GH4), 03.2007, 6SL3097-2AJ00-0BP4