Et 200Eco Operation On A Grounded Power Supply - Siemens SIMATIC ET 200eco Manual

Wiring
Plant startup after specific events
The table below shows what you need to observe for a restart of the plant after
specific events.
Startup after voltage drop or loss
Startup of ET 200eco after an
interrupt of bus communication
Startup after release of the
"EMERGENCY–OFF" device
24 VDC power supply
The table below shows what you have to observe when operating the 24 VDC
power supply.
For...
buildings
24 VDC supply lines,
signal lines
24 VDC supply
Power supply routing
Protection against external electrical interference
The table below shows what you have to observe in order to protect your system
from electrical interference and faults.
all plants or systems
equipped with an ET 200eco,
power supply/signal/bus
cables
signal and bus cables
3.2

ET 200eco operation on a grounded power supply

Below you can find information on the overall structure of an ET 200eco distributed
I/O station that is operated on a grounded power supply (TN-S network). The
topics treated here are: shutdown devices, short–circuit/overload protection to
DIN VDE 0100 and DIN EN 60204-1.
3-2
If...
an external lightning
protection
internal lightning protection
safe (electrical) isolation of the extra–low voltage
Power loss in the through–loop (see Chapter 3.4.5).
For...
the plant or system is connected to a grounding conductor
in order to discharge electromagnetic interference.
correct installation and cable routing.
a cable/wire break can not cause indefinite plant or
system states.
then...
hazardous states must not develop. If necessary,
force EMERGENCY–OFF!
controlled and defined startup must be ensured at
all times.
always provide...
lightning protection measures
(e.g. lightning protection (e.g. lightning protection
elements)
ensure that...
ET 200eco Distributed I/O Station
A5E00158716-02