User`s manual
CAPA831 Intel
® 
Atom
TM
 D2550/N2800/N2600 Processor 3.5” SBC 
14    Board and Pin Assignments 
2.4.1  Inverter Connector (CN1) 
This is a DF13-8S-1.25C 8-pin connector for inverter. We strongly recommend you to 
use the matching DF13-8S-1.25C connector to avoid malfunction. 
 8                  1 
2.4.2  CPU Fan Connector (CN2) 
A CPU fan interface is available through this connector. You can find fan speed on BIOS 
Setup  Utility  if  CPU  fan  is  installed.  For  further  information,  see  BIOS  Setup  Utility: 
Advanced\H/W Monitor\PC Health Status (see section 4.4). 
Pin 
Signal 
1 
VBL1 (+12V level) 
2 
VBL1 (+12V level) 
3 
VBL2 (+5V level) 
4 
VBL_ENABLE 
5 
GND 
6 
GND 
7 
GND 
8 
VBL Brightness Control 
Pin 
Signal 
1 
GND 
2 
+12V level 
3 
Fan speed feedback 










