Safety instructions
2.5 Safety instructions for I/O devices
Operating Instructions, 01/2021, A5E43920357-AA
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2.5
Safety instructions for I/O devices
Risk of damage to the device from connecting I/O devices
CAUTION
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.
Danger due to regenerative feedback
NOTICE
Damage through 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 supply voltage into the device through connected or installed I/O devices, such as
a USB drive.
•
Prevent regenerative feedback.
Note on measuring the counter voltage
Note
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.