Safety instructions
2.5 Information on I/O devices
SIMATIC IPC BX-39A
24 Operating Instructions, 07/2022, A5E50715883-AA
2.5 Information on 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.
Damage through regenerative feedback
Regenerative feedback of voltage to ground by a connected or installed component can
damage the device.
Connected or built-in I/Os, for example, a USB drive, are not permitted to supply any voltage
to the device.
Regenerative feedback is generally not permitted.
When measuring the counter emf, remember the following:
The IPC in question must be turned off and the power supply connector must be plugged
in.
During the measurement, all cables from the plant to the IPC should be connected.
All other components in the plant must be active.
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