Board Features
VL-EPU-4562/4462 Reference Manual
23
Table 3: Main Power Connector Pinout
Pin
Signal
Description
Pin
Signal
Description
1
PWRIN_POS
Main input voltage
(+8V to +30V)
2
PWRIN_POS
Main input voltage
(+8V to +30V)
3
EARTH_GND
Earth ground
4
PWRIN_POS
Main input voltage
(+8V to +30V)
5
POWER_FAULT
An open-drain signal
•
Low if power is OK
•
Open if there is a
power fault
(Note)
6
PWRIN_NEG
Power return
7
PWRIN_NEG
Power return
8
PWRIN_NEG
Power return
Note:
A power fault can be due any of the following conditions:
•
The input power is off.
•
The main input regulator has failed.
•
The power input is under or over-voltage (not in the 8 - 30V range).
Cabling
An adapter cable, part number VL-CBR-0809, is available for connecting the Blackbird to an
ATX power supply.
If your application requires a custom cable, the following information will be useful:
VL-EPU-4562/4462 Board Connector
Mating Connector
Molex 055959-0830
Molex 051353-0800
Power Requirements
The Blackbird requires a 8 to +30 VDC supply capable of providing at least 35 W
average power that can also provide a peak power of 60 W. The input DC supply creates both the
standby and payload voltages provided to the CPU module.
The exact power requirements for the Blackbird depend on several factors, including CPU
configuration (the number of cores, CPU clock rate), memory configuration, peripheral
connections, and attached devices, and others.
The VersaLogic VL-PS-ATX12-300A is a 1U size ATX power supply suitable for use with the
Blackbird. Use the VL-CBR-0809 adapter cable to attach the power supply to the main power
connector.
Power Delivery Considerations
Using the VersaLogic approved power supply (VL-PS-ATX12-300A) and power cable
(VL-CBR-0809) will ensure high quality power delivery to the board. Customers who design
their own power delivery methods should take into consideration the guidelines below to ensure
good power connections.
The specifications for typical operating current do not include any off-board power usage that
fed through the Blackbird power connector. Expansion boards and USB devices plugged into the
board will source additional power through the Blackbird power connector.
