Installing and connecting the device 
  3.3 Connecting the device 
SIMATIC IPC PX-39A 
Operating Instructions, 08/2022, A5E51699601-AA 
43 
3.3.3  Connecting the power supply 
3.3.3.1  Connecting 100-240 VAC power supply 
 
Safety regulations- connecting cable 
Use only AC connecting cables which comply with the local safety regulations. 
Otherwise, there is a risk of fire and electric shock. This can result in personal injury or 
property damage.  
•  Ensure that the AC connecting cables comply with the safety regulations of the country 
in which the device is installed and bear the marks required in each case. 
•  Connect the protective conductor in accordance with the operating instructions. 
 
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, make sure that the power supply connector is easily 
 
Injury to persons or damage to property when operated on an incorrect power supply 
system 
If you connect the device to an unsuitable power supply, the device receives voltages and 
currents that are too high or too low. 
Injuries to persons, malfunctions or a damage to the device can result.  
•  The permissible rated voltage of the device must match the local supply voltage. 
•  Operate the device only in grounded power supply networks (TN networks in accordance 
with VDE 0100, Part 100 or IEC 60364-1). 
 
Operation in non-grounded or impedance-grounded networks is not permitted. 
Note 
The varying voltage power supply module is designed for operation on 120/230/240 V AC 
networks. The setting of the voltage range takes place automatically.