Chapter: Connectors Power Input
page 18 Beckhoff New Automation Technology CB3064-xxxx
4.2 Power Input
The connector for power supply is a 2x10-pin connector.
The 12V voltage supply is needed for employment of PCI-Express cards and FAN connectors. COM RXD
and TXD also can be used for PSU, e.g. the UPS functionality.
Communication is carried out via SMBus signaling (SMB_CLK/SMB_DAT).
SMBus clock signal/
COM transmit data
SMBus data /
COM receive data
'Power Supply On'-
enables/disables the output
voltages:
Ground = voltages ON
Open Drain = voltages OFF
'ATX Powergood':
Low(0V) = voltage not ok
Open Drain = voltage ok
Powerbutton output to turn
on/off the connected
computer
SUSV activity:
Low (0V) = SUPS inactive
High (3.3V) = SUPS active
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