Subrack; Cables - Siemens SIMATIC FM 458-1 DP User Manual

5.1.5 Subrack

5.1.6 Cables

Shielding,
permissible cable
lengths
Application Module FM 458-1 DP - User Manual
A5E01078222-02 Edition 03.2009
 The subrack must be connected to the ground/potential bonding rail
through the shortest possible connection using a cable with min.
2
10mm .
 All of the modules must be tightly screwed into the subrack. This is
also true during the commissioning phase!
 If modules are inserted in adapters during the commissioning phase,
the front panel must be connected to the housing using the shortest
possible connection.
 Modules may neither be withdrawn nor inserted under voltage.
 The connectors for serial interfaces must be tightly screwed to the
front panel.
All signal cables, which are connected to FM components, must be
shielded.
The shield braiding of incoming and outgoing signal cables must be
connected as close as possible at the terminal block or at the FM
components on the shield rail.
The shield braiding of cables between the terminal blocks and the FM
components must be connected to the shield rail at both ends.
Cables entering from outside (e.g. cables to the terminal modules) may
not be routed together with internal cables in a cable duct.
Serial connecting cables must be shielded. The shield must be
connected to a metalic connector housing. In addition, it must also be
connected to the shield rail. The cable shield may not be connected to
pin 1 of the connector.
A shield using the front panel of the modules is not effective.
Analog signal cables must be shielded, both inside and outside the
cabinet.
All signal cables must have a cable shield.
Module
Outputs
Inputs, 230 V AC
Inputs, 24...60 VDC
A minimum clearance of > 10 cm must be maintained between signal
cables and power cables below 500 V AC; a clearance > 30 cm must be
maintained between signal cables and power cables above 1 kV AC.
Assembly guidelines
Cable length, shielded
1000 m
1000 m
1000 m
5-5