Safety instructions
2.2 General safety instructions
SIMATIC IPC347E
18
Operating Instructions, 09/2018, A5E41134132-AE
2.2
General safety instructions
Fully disconnecting the device from mains voltage
WARNING
Risk of fire and electric shock
The on/off button and on/off switch do not fully disconnect the device from the main power
supply. 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 completely disconnect the device from the main power supply 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 is 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 is 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
WARNING
Life-threatening voltages are present with an open control cabinet
When you open the control cabinet, some areas or components might be carrying life-
threatening voltages.
If you touch these areas or components, electric shock might kill you.
Switch off the power supply to the cabinet before opening it.
