PM250 Power Module 
Hardware Installation Manual, 01/2016, A5E36265179B-AA 
27 
 
Install the inverters so that you are compliant with local regulations for erecting and installing 
low voltage systems. 
 Fundamental safety instructions (Page 9)  
 
Danger to life through electric shock due to the residual charge of the DC link capacitors 
Because of the DC link capacitors, a hazardous voltage is present for up to 5 minutes after 
the power supply has been switched off.  
Contact with live parts can result in death or serious injury. 
•  Do not open the protective cover of the device until 5 minutes have elapsed. 
•  Before starting any work, check that the system is in a voltage-free state by measuring 
all terminals, also to ground. 
•  Ensure that the associated warning plate in the appropriate language is attached. 
 
Note 
Operating displays for inverter operation 
If, when switching over a function from ON to OFF, an LED or other similar display is not lit 
or not active; this does not indicate that the device is switched
-off or in a no-current 
 
 
Note 
Safety devices 
Install suitable protective equipment between the line supply and inverter.
 
 Technical specifications (Page 53) 
You will find additional information on the Internet at: 
To protect against indirectly touching part of the motor circuit of an inverter and to 
automatically shut down in the case of a fault according to DIN EN 60364-4-41 (VDE 0100-
410). (http://support.automation.siemens.com/WW/view/en/103474630)