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727 posts

Ultimate Geek
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Topic # 87895 9-Aug-2011 22:56
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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

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2580 posts

Uber Geek
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  Reply # 504126 9-Aug-2011 23:27
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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.

3267 posts

Uber Geek
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  Reply # 504136 10-Aug-2011 05:49
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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!




727 posts

Ultimate Geek
+1 received by user: 31


  Reply # 505022 11-Aug-2011 15:05
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Thanks for the info. Guess I'm safe to connect Pin1 to the 12v on the header.




Cheers - Kirk

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