BECKHOFF CB4050 - Manual (Page 16)

Chapter: Connectors Power Supply
page 16 Beckhoff New Automation Technology CB4050
4.2 Power Supply
The connector for the power supply is a standard IDC socket connector with a spacing of 2.54 mm.
The board only requires an operating voltage of 5 volt ± 5%. 3.3V output to the PC/104-Plus bus is the
only off-board supply available.
Should additional voltages be needed for PC/104 expansion cards, these must be provided externally by
connecting the respective pins (see below).
For maximum current availability, it is recommended to use both this power connector and the PC/104
connector for power supply.
N OTE
For "Real Time Clock" an external battery (3.3V) must be connected. You can use pins 1 & 3 here or the
"System" connector (see next page).
Description Name Pin Name Description
ground GND 1 2 VCC 5 volt supply
CMOS battery >= 3 volt VBAT 3 4 12V 12 volt supply
-5 volt supply -5V 5 6 -12V -12 volt supply
ground GND 7 8 VCC 5 volt supply