Table of Contents
Advertisement
Wiring
Reliable Electrical Isolation
Reliable electrical isolation is required with modules that are powered with voltages
≤ DC 60 V or ≤ AC 25 V, in other words, the power supply of the ET 200iS must be
reliably electrically isolated.
Setting up the ET 200iS with a Grounded Reference Potential
When the ET 200iS distributed I/O station is configured with a grounded reference
potential, any interference currents are diverted to the grounding conductor.
ET 200iS within the Entire System
The following schematic shows the ET 200iS distributed I/O station within the entire
system in zone 1 (power supply and grounding concept) when powered from a TN-
S system.
L1
L2
L3
N
PE
(1)
(2)
AC
DC
Figure 6-1 Operating the ET 200iS with a Grounded Reference Potential
6-4
Low voltage distribution, e.g.
TN-S system (3x400V)
Hazardous area zone 1
ET200iS
FE: Functional earth for direct
diversion of noise levels on
the DIN rail over spring contacts
1L+
2L+
FE
1M
2M
1PA
2PA
Ground bus
FE
FE
FE
FE
Shield contact element for
contacting cable shields
ET 200iS Distributed I/O Station
Enclosure EEx e
DIN rail
FE
A5E00087831-02
Advertisement
Table of Contents
