Installing and connecting the device 
  3.3 Connecting the device 
SIMATIC IPC847D 
Operating Instructions, 01/2014, A5E32997454-AA 
43 
 
 
Make sure that the on/off switch 
② is in 
 
This prevents an unintentional starting of 
the device when plugging in the power 
cable. 
 
 
Connect the power cable to the socket 
①
. 
 
Plug the power cable plug into the 
shockproof power outlet. 
 
Switch on the on/off switch ②
. 
The yellow power LED (standby) on the 
front panel of the PC lights up. 
Connecting a redundant power supply 
 
 
Switch off both on/off switches ②. 
 
Connect the two IEC plugs ①
. 
 
Switch on both on/off switches 
②. The 
③ light is green. 
 
If only one control supply module is 
switched on or connected, or a module is 
defective, a warning signal is emitted. 
You cancel the warning signal by 
pressing button 
④. 
The status is also displayed and signaled 
by the SIMATIC monitoring software, if 
activ
e. You can mute the acoustic alarm 
in the SIMATIC monitoring software.