Technical data

PROFIBUS Network Manual
System Manual, Edition 04/2009, C79000-G8976-C124-03
233
Passive components for power supply
9
9.1 Overview of 7/8" cabling system
9.1.1 Overview of 7/8" cabling system
7/8" cabling system for supplying power
To supply power to IP65 PROFIBUS nodes (for example the SIMATIC ET 200), there is a
7/8" cabling system available.
The power supply concept of the ET 200 involves power being supplied by a central power
supply unit and being looped through from device to device. The load and device supply are
over separate circuits. The devices have a 7/8" male connector on the input side and a
socket on the output side.
7/8" connecting cables consist of a flexible 5-wire cable to supply two independent circuits
and have both a 7/8" male and female connector.
The cable is available both in meters to allow connectors to be fitted on-site and
preassembled in various lengths.
Note
How to lay power cables
● When laying power cables, the same physical constraints apply as described in Section
"
Installing bus cables (Page 259)" for bus cables.
● The limits for temperature, tensile loading, pressure, torsion, bending radii etc. specified
in the data sheet must not be exceeded.
Ordering special cables, accessories, and tools
Special cables and special lengths of all SIMATIC NET cables as well as accessories, tools
and measuring equipment can be obtained from:
I IA SE IP S BD 1
Jürgen Hertlein
Tel.: [phone]
Fax: [phone]
[e-mail] (
mailto:mailto:[e-mail])