The type of components and the binding protective measures depend on which IEC (DIN VDE)
regulation applies to your system configuration.
Table 6-2 Protective measures and components
Protective measures and areas of ap‐
plications
Reference for follow‐
ing figure
IEC 60364 (DIN VDE 0100) IEC 60204 (DIN VDE 0113)
Shutdown device
for controllers, signal transmitters and
actuators
① Main switch Disconnector
Disconnector / protection element
for load power supply for AC load cir‐
cuits with more than five electromag‐
netic devices
② Galvanic isolation by trans‐
former recommended
Galvanic isolation by trans‐
former recommended
Short-circuit / overload protection:
In groups for sensors and actuators
② / ③ Single-pole protection of cir‐
cuits
Load power circuit
● With grounded
secondary circuit: single-
pole protection
● otherwise: Secure all pins
The tables refer to the following figure and compares the IEC (DIN VDE) regulations.
Wiring
6.3 Operation of the IO device on a grounded power supply
ET 200SP HA Distributed I/O system
System Manual, 08/2019, A5E39261167-AD 83
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