Siemens SIMATIC ET 200AL System Manual page 172

The figure below shows the overall electrical configuration using the example of an
IO-Link I/O module with port class A or B on an IO-Link master with port class A.
①
②
③
④
Figure 5-2
IO-Link I/O modules
System Manual, 08/2021, A5E48755395-AB
5.2 Operation of the IO-Link I/O modules on a grounded/ungrounded infeed
Main switch
Short-circuit and overvoltage protection
Fuses for cable protection
In the configuration of the IO-Link system with ungrounded reference potential, the connection
between 1M, 2M and functional ground is omitted.
Electrical configuration of an IO-Link I/O module with port class A or B on an IO-Link
master with port class A.
Connecting
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