Commissioning the device   
4.2 Switching off the device 
  SIMATIC IPC PX-39A PRO 
60  Operating Instructions, 11/2022, A5E51699950-AA  
4.2  Switching off the device 
Shutting down the operating system 
For active operating system 
•  Shut down the operating system properly. 
Result 
The device is switched off but not fully disconnected from the line voltage. 
Fully disconnecting the device from the line voltage 
 
Risk of electric shock 
The On/Off switch does not fully disconnect the device from the line voltage.  
There is also a risk of fire if the device or connecting lines are damaged. 
•  Always fully disconnect the device from the line voltage before performing work on the 
device or when the device will not be used over an extended period of time. 
•  For control cabinet mounting: Use a central, easily accessible AC circuit breaker close to 
the device, if possible. 
 
When you install the device, ensure that the power supply connector is easily accessible. 
•  Shut down the operating system and unplug the power plug from the front of the device, 
see "Interfaces and operating elements (Page 17)". 
The device is switched off and fully disconnected from the line voltage. No trickle current is 
flowing. 
Hardware reset 
With the hardware reset, you can restart the device if it does no longer respond to keyboard 
or mouse input. Any running operating system will not shut down safely. 
 
If a hardware reset is performed, the device undergoes a hard reboot.  
•  Data in the main memory is deleted. 
•  Data on the hard disk drive may be lost. 
•  The device may be damaged. 
Perform a hardware reset only in the case of an emergency. 
•  Operate the on/off switch to initiate a hardware reset, see "Interfaces and operating 
elements (Page 17)".