Technical specifications 
  8.5 Hardware descriptions 
SIMATIC IPC627D/827D 
Operating Instructions, 09/2014, A5E32990859-AB 
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Pin assignment of the supply for the power supply fan, X515 
 
4  PWM  PWM signal  Output 
Pin assignment of serial ATA voltage supply, X516 - X521 
 
Connector for backup battery, X40, X41  
A battery for buffering the CMOS RAM is connected to this connector. This is a 3 V Lithium 
battery with a capacity of 750 mAh. 
 
 
Front interfaces (only in combination with IPC677D) 
Overview 
 
Connection of LC displays 
Internal USB 2.0 interface (USB channel 6) 
Internal USB 3.0 interface (USB channel 3) 
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