Its a 10 slot with integrated power supply. I have three. They are amazing... For DIYers to know, they have the possibility to have multiple outputs that travel over the unused pins on the card.
15 Pin Edac Pinout (SLOT 1-10)
Pin 1: Chassis Ground
Pin 2: Output A + (XLR Male Pin 2)
Pin 3: Output B+ (OPT OUT 1/4″ Tip)
Pin 4: Output A – (XLR Male Pin 3)
Pin 5: Audio Ground
Pin 6: Output B – (OPT OUT 1/4″ Ring)
Pin 7: Input – (OPT IN 1/4″ Ring)
Pin 8: Input – (XLR Female Pin 3)
Pin 9: Input + (OPT IN 1/4″ Tip)
Pin 10: Input + (XLR Female Pin 2)
Pin 11: NC
Pin 12: +15 – 16VDC 130ma
Pin 13: Audio Ground
Pin 14: -15 – 16VDC 130ma
Pin 15: +48VDC 15ma
with some of the purple 500 units they leverage those outputs but you could also use them in your own builds too...