Cabling; Power Requirements; Power Delivery Considerations; Table 3: Main Power Connector Pinout - VersaLogic Blackbird VL-EPU4562 Hardware Reference Manual

Table 3: Main Power Connector Pinout

Pin Signal
1 PWRIN_POS
3 EARTH_GND
5 POWER_FAULT
7 PWRIN_NEG
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:

Power Requirements

The Blackbird requires a single +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.
VL-EPU-4562/4462 Reference Manual
Description
Main input voltage
(+8V to +30V)
Earth ground
An open-drain signal
• Low if power is OK
• Open if there is a
power fault (Note)
Power return
VL-EPU-4562/4462 Board Connector
Molex 055959-0830
Pin Signal
2 PWRIN_POS
4 PWRIN_POS
6 PWRIN_NEG
8 PWRIN_NEG
Mating Connector
Molex 051353-0800
Board Features
Description
Main input voltage
(+8V to +30V)
Main input voltage
(+8V to +30V)
Power return
Power return
23