Wiring
3-3
ET 200eco Distributed I/O Station
A5E00158716-02
Definition: Grounded powersupply
The neutral conductor of grounded power supplies is connected to ground. Any
ground fault at a live conductor or grounded part of the system will trigger a
response of the protection devices.
Components and protective measures
Vario1us components and protective devices are mandatory for plant/system
installation. The type of components and the binding character of the regulations
for protective measures depends on the DIN VDE regulation that applies to your
plant installation. The table below refers to Figure 3-1.
Compare...
Refe-
rence to
DIN VDE 0100
DIN EN 60204
Shutdown device for the
controller, signal transdu-
cers and actuators
...Part 460:
Main switch
...Part 1:
Isolating switches
Short–circuit and over-
load protection
...Part 725:
Single–pole fu-
sing of circuits
...Part 1:
grounded secondary circuit:
single–pole fusing
Safety electrical isolation
Safety electrical isolation is required for :
•
Modules that require a
60 VDC or
25 VAC power supply
•
24 VDC load current circuit
ET 200eco installation with grounded reference potential
In ET 200eco installations with grounded reference potential all electrical
interference is discharged to protective earth. These connections must be
interconnected externally or in the connector (see Figure 3-1: Interconnecting 1M
and PE).
ET 200eco installation with floating reference potential
In ET 200eco installations with floating reference potential any electrical
interference is discharged to protective earth via an internal RC network (see
Figure 3-1: No interconnection 1M to PE).
Isolation monitoring
The following situations always require isolation monitoring:
•
ungrounded ET 200eco installations
•
if hazardous plant states can develop due to successive faults
Summary of Contents for SIMATIC ET 200eco
Page 8: ...Preface viii ET 200eco Distributed I O Station A5E00158716 02 ...
Page 18: ...Product overview 1 6 ET 200eco Distributed I O Station A5E00158716 02 ...
Page 70: ...Commissioning and diagnostics 4 16 ET 200eco Distributed I O Station A5E00158716 02 ...
Page 116: ...I O address area C 6 ET 200eco Distributed I O Station A5E00158716 02 ...
Page 124: ...Index Index 4 ET 200eco Distributed I O Station A5E00158716 02 ...
