Siemens 6SN1123-1AA00-0DA2 Configuration Manual page 341

9 Cabinet Design and EMC
9.1 Installation and connecting–up regulations
Connection,
electronics ground
Protection against
overvoltages
Maximum
cable lengths
9-340
Terminal X131 (electronics ground) at the NC.
In order to provide protection against overvoltage (for line supplies that are not
in compliance with VDE), an overvoltage limiter module (Order No.:
6SN1111–0AB00–0AA0) can be inserted at connector X181 on the NE module
(this is not necessary for UI 5 kW and monitoring module).
Using non–shielded signal and direct current supply cables
(e.g. 24 V infeed with external supply):
S
DC power supply cables:
S
Non–shielded signal cables:
For longer lengths, the user must connect suitable circuitry to provide overvol-
tage protection, e.g. the following type:
TERMITRAB–UK5/ 24DC
Article no. 27 94 69 9 from
Fa. Phoenix Contact GmbH & Co
32823 Blomberg, Germany
Tel. +49 (0)5235/300
Fax +49 (0)5235/341200
http://www.phoenixcontact.com
Note
We recommend that prefabricated cables are used, as correct shielding is
necessary to ensure an EMC–safe connection.
Further, the appropriate cable parameters are required in order to ensure
optimum signal transfer characteristics. The function will only be guaranteed
when using the original cables.
Reference: /EMC/
SIMODRIVE 611 Configuration Manual (PJU) – 02/2012 Edition
Length p 9.90 m permissible.
Length, max. 30 m permissible without
any additional circuitry
EMC Configuring Guidelines
SINUMERIK, SIROTEC, SIMODRIVE
© Siemens AG 2012 All Rights Reserved
02.03
05.01