Siemens SIMATIC ET 200AL, System Manual

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Connecting
5.2 Operation of the IO-Link I/O modules on a grounded/ungrounded infeed
IO-Link I/O modules
System Manual, 08/2021, A5E48755395-AB
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Components and protective measures
Various components and protective measures are stipulated for setting up a complete plant.
The types of components and the degree to which the protective measures are mandatory
depend on the IEC regulation that applies to your plant setup.
The following table shows the components of the electrical configuration with reference to
the previous figure and compares the IEC regulations.
Table 5- 1 Components of electrical configuration
Reference to
illustration
IEC 60364
(DIN VDE 0100)
IEC 60204
(DIN VDE 0113)
Disconnection ele-
ment for controller,
sensors, and actuators
① ... Part 460:
Main switch
... Part 1:
Disconnectors
Short-circuit / over-
load protection
② .... Part 725:
Single-pole protection of
circuits
... Part 1:
Single-pole protection of
grounded secondary circuit
Cable protection ③ ... Part 430:
Protection of cables and
wires against overcurrent
Protect all incoming supply
cables with a circuit breaker.
... Part 1:
Overcurrent protection
Insulation monitoring
You must provide insulation monitoring in the following cases:
•
In the configuration of the IO-Link system with ungrounded reference potential
• When hazardous system conditions may occur due to errors