SIMATIC IPC547E
Operating Instructions, 02/2014, A5E32317120-AB
23
General safety instructions
Fully disconnecting the device from mains voltage
Risk of fire and electric shock
The on/off button and on/off switch do not fully disconnect the device from the mains. If the
device is switched off with the on/off switch, there remains a risk of electric shock and fire
hazard, for example, if the device or connection cables are damaged or if the device is
used improperly.
Always fully disconnect the device from the mains voltage as follows before performing
work on the device or when the device will not be used over an extended period of time.
• If the device was not mounted in a control cabinet: Shut down the operating system and
pull the power plug on the rear of the device.
• If the device was mounted in a control cabinet: Shut down the operating system and
switch the AC circuit breaker to "Off".
• Properly connect the device to a protective conductor.
Devices in the control cabinet
Life-threatening voltages are present with an open control cabinet
When you open the control cabinet, some areas or components may be carrying life-
threatening voltages.
If you touch these areas or components, you may be killed by electric shock.
Switch off the power supply to the cabinet before opening it.
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