IEEE 1394a Pinouts

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ADKM

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#87895 9-Aug-2011 22:56

Wanting to install a 6 pin Firewire connector on the computer (Gigabyte GA -M56S-S3. Motherboard has a 10 pin header and I can identify TPA, TPB, GRD but a bit concerned about Pin 1 which the specs say is +30V unregulated DC. My board shows only 12v on pins 7 & 8. Should I connect Firewire pin1 to one of those, or not?

Thanks.

Cheers - Kirk

Bung

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#504126 9-Aug-2011 23:27

You'll probably find that the Firewire spec for Pin 1 is for a maximum voltage of 30V unlike USB which is a fixed voltage.

Niel

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#504136 10-Aug-2011 05:49

http://pinouts.ru/Slots/ieee1394_pinout.shtml
It is 8 to 40V, 1.5A max allowed (for cable and connectors rating). Most likely 12V in a PC. Note that iLink usually do not have the power connections, only the twisted pairs. I've used Firewire on a number of itemrs from consumer to pro audio and none drew power from the port.

You can never have enough Volvos!

ADKM

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#505022 11-Aug-2011 15:05

Thanks for the info. Guess I'm safe to connect Pin1 to the 12v on the header.

Cheers - Kirk