Safety instructions
2.5 Safety instructions for I/O devices
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2.5 Safety instructions for I/O devices
Risk of damage to the device from connecting I/O devices
Fault caused by I/O devices
The connection of I/O devices can cause faults in the device.
The result may be personal injury and damage to the machine or plant.
• Only connect I/O devices which are approved for industrial applications in accordance
with EN 61000-6-2 and IEC 61000-6-2.
• I/O devices that are not hotplug-capable may only be connected after the device has
been disconnected from the power supply unit.
Danger due to regenerative feedback
Damage to the device due to regenerative feedback
A connected or installed component can cause voltage to be fed back to ground in the
device.
This can damage the device.
• Do not introduce voltage into the device through connected or built-in I/O devices that
are operated with their own power supply unit (e.g. a USB drive with an external power
Note on measuring the counter voltage
Note the following when measuring the counter voltage:
Switch off the affected device and then insert the power plug.
Connect all cables from the system to the device and switch all components of the system
to active before starting the measurement.
Workstation SIMATIC IPC
RW-545A Operating
Instructions, 08/2023, A5E52943278-AA
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