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Protection from External Electrical Influences
The following table describes points to remember relating to the protection from
electrical influences or faults:
Table 6-4
all plants or systems in which the ET 200iS
is installed
power supply, signal, and bus cables
signal and bus cables
6.2
Operate the ET 200iS with a Grounded-Neutral Supply
Definition: Grounded-Neutral Supply
With a grounded-neutral supply, the neutral lead of the power supply is grounded.
A single ground fault between a live conductor and ground or a grounded part of
the system causes the protection devices to react.
Components and Protective Measures
When setting up a system, various components and protective devices are
mandatory. The type of component and the necessity of the protective measures
depends on the DIN VDE regulations that apply to your system configuration. The
table below relates to the schematic that follows.
Table 6-5
Compare...
Shutdown device for
controllers, transducers and
actuators
Short-circuit and overload
protection
ET 200iS Distributed I/O Station
A5E00087831-02
Protection from External Electrical Influences
For...
Components and Protective Measures
Relates to
figure
(1)
(2)
make sure that...
the plant or system is connected to a
grounding conductor to divert
electromagnetic interference.
the cables are installed and routed correctly.
a cable or wire break cannot lead to
undefined statuses in the plant or system.
DIN VDE 0100
...Part 460: main
...Part 1:
switch
disconnector
...Part 725: Single
...Part 1: single
pole fusing of
pole fusing of
circuits
grounded
secondary circuit
Wiring
DIN VDE 0113
6-3
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