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Safety instructions
2.9 Notes on device and system extensions
NOTICE
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.
Note
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.
2.9
Notes on device and system extensions
Device and system extensions
Fire hazard due to overheating of the device
Expansion cards generate additional heat. The device might overheat or cause a fire.
• Observe the safety and installation instructions for the expansion cards.
• Observe the max. permissible power consumption values.
NOTICE
Damage caused by device and system extensions
Device and system expansions might contain faults and affect the entire device, machine or
plant. They can also violate safety rules and regulations regarding radio interference
suppression.
If you install or replace device or system expansions and damage your device, the warranty
is voided.
• Always disconnect the power plug before you open the device.
• Only install device or system expansions designed for this device.
• Observe the information on "Electromagnetic compatibility" provided in the technical
28
CAUTION
specifications.
Operating Instructions, 03/2023, A5E52332059-AA
SIMATIC IPC RW-543A
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