ADLINK cBP-3204[R] - Manual (Page 47)

Backplane
• 37
u
JP7 +12V Sense: +12V Sense Jumper
Pin # Name
1 From pin #18 of CN1/CN2
JP7
2 Connect to +12V Sense
When the normal ATX power supply is used, the pin #18 of CN1/CN2 is
with –5V power, please let this jumper open.
When 31-pin CompactPCI power supply is used, this pin is not used and this
jumper should be left open.
When 47-pin CompactPCI power supply is used, the +12V sense is usable,
therefore, the jumper can be shorted to provide this signal.