Siemens Simantic ET200SP - Page 83

Wiring
5.4 Operating the ET 200SP on grounded incoming supply
Distributed I/O system
System Manual, 12/2016, A5E03576849-AG
83
Short-circuit / overload protection
Various measures as protection against short-circuits and overloads are required for setting
up a full installation. The type of components and the binding protective measures depend
on which IEC (DIN VDE) regulation applies to your system configuration. The table refers to
the figure below and compares the IEC (DIN VDE) regulations.
Table 5- 1 Components and protective measures
Refer to figure
IEC 60364 (DIN VDE 0100)
IEC 60204 (DIN VDE 0113)
Disconnecting device for controller,
sensors, and actuators
①
Main switch Disconnector
Short-circuit / overload protection:
In groups for sensors and actuators
②
③
Single-pole protection of
circuits
With grounded secondary
circuit:
single-pole
protection
otherwise:
all-pole
protection
Load current supply for AC load cir-
cuits with more than five items of
electromagnetic equipment
②
Galvanic isolation by trans-
former
recommended
Galvanic isolation by trans-
former
recommended
Permissible cable temperature
Note
Permissible cable temperature
The minimum permissible cable temperature must be 30
°C more than the ambient
temperature of the ET
200SP system (example: at an ambient temperature of 60 °C, a
connection conductor must be dimensioned for a temperature range of at least 90
°C).
You should specify other connection types and material requirements based on the electrical
characteristics of the circuits you
use and the installation environment.