6.2 Operating the ET 200iSP with equipotential bonding
Components and protective measures
When setting up a system, various components and protective devices are mandatory. The types
of components and the degree to which the protective measures are mandatory depend on the
DIN VDE regulation that applies to your plant setup. The table below relates to the schematic that
follows.
Table 6-5 DC 24V supply in the safe area
Compare Relates to gure DIN VDE 0100 DIN VDE 0113
Shutdown device for
controllers, transducers
and actuators
(1) ...Part 460: Main switch ...Part 1: Disconnector
Short-circuit and over‐
load protection
(2) ...Part 725: Single-pole
protection of circuits
...Part 1: With a grounded
secondary circuit: single-
pole protection
Safety isolation
Reliable electrical isolation is required with modules that are powered with voltages ≤ DC 60 V
or AC 250 V, in other words, the supply voltage of the ET 200iSP must be reliably electrically
isolated.
ET 200iSP with ungrounded reference potential
With the ET 200iSP, the reference potential M of the supply voltage is not connected to the
functional ground (mounting rail, connection equipotential bonding on the terminal module).
Wiring
6.2 Operating the ET 200iSP with equipotential bonding
ET 200iSP
Operating Instructions, 11/2022, A5E00247483-AK 121
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