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1394 pinout problem

Last response: in Components
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January 9, 2013 1:43:32 AM

Hi, I am trying to figure out how to connect a firewire header to a firewire card. I've looked around the internet and checked the owners manuals. The piece of equipment that requires it is old, but expensive, so I'd rather not fry it...

Here's what I've got:

Asus P8Z77-V Deluxe mobo (no 1394 support)

Corsair Obsidian Series 650D
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Rosewill PCIE FireWire 1394a Card 2+1 Ports Model RC-504
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Cables online FW-1X6M
http://www.cablesonline.com/12fiie136mat.html

The case header is looking for a 9 pin mobo connector, the card and cable are 6 pin. Will they talk to each other if I pick the correct 6 pins on the header (and how)?

I only need 1394a (400).

Thanks!

More about : 1394 pinout problem

January 9, 2013 2:25:21 AM

the pins go like this
1 3 5 7 9
2 4 6 8

you wont be using 7 8 or 9
1 - tpa+
2 - tpa-
3 - gnd
4 - gnd
5 - tpb+
6 - tpb-


those should be labeled on your front panel wiring
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January 9, 2013 2:32:45 AM

popatim said:
the pins go like this
1 3 5 7 9
2 4 6 8

you wont be using 7 8 or 9
1 - tpa+
2 - tpa-
3 - gnd
4 - gnd
5 - tpb+
6 - tpb-


those should be labeled on your front panel wiring


Thanks for the help, the ground labeling must be VG (black) and VP (white), does it matter which way these go?

If you look at the cable link you can see what I'm referring to (the tpa's not marked "+" are marked "-" in hand).
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January 9, 2013 3:47:43 AM

Well, I was a little unsure of the VG and VP labels, so I put a multi-tester to them. The VP is a power lead pushing 12 volts. This seems to make the previously suggested pin layout incorrect.

To be clear, the 6 pins are labeled as such:

tpa+
tpa-
VG (tested has ground continuity, black)
VP (tested hot 12V, white)
tpb+
tpb-
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!