Firewire IEEE1394 Connectors and Pinouts


There are not so many places on the web to find wiring info on FireWire or IEE 1394 cables and connectors. This page was initially build to gather my own info into one single page. Just lately I bought a FireWire 800 drive and discovered that my computer only has a firewire 400 6pin connector. With the drive came a regular 9pin -9pin FireWire 800 cable, so the idea of cutting it in two and connecting two FireWire 6pin 400 connectors was born. But how to connect it?

Cut the cable in two and strip the loose end. Take a colored wire and use a multimeter to find out on which pin it is. Then you know on which side of the tabel you are. Example: you have a 9pin -9pin cable and want to attach a 4 pin connector. Cut the cable in two, strip the wires and select the green wire. With the multimeter try contact 4 or 2. If the wire is connected to the 4 (the blue side of the tabel), it means that the new connector should use the pinout of the yellow side of the tabel. This is only true for cables between devices. For extender cables you should stick to one side of the tabel.

Pinout of the different connector types.

4 pin

6 pin

9 pin

signal

color

signal

9 pin

6 pin

4 pin

1

3

1

b-

orange

a-

3

5

3

2

4

2

b+

blue

a+

4

6

4

3

5

3

a-

red

b-

1

3

1

4

6

4

a+

green

b+

2

4

2

   

5

a shield

blank

b shield

9

   
 

2

6

pwr gnd

black

pwr gnd

6

2

 
   

7

-

-

-

7

   
 

1

8

pwr +

white

pwr +

8

1

 
   

9

b shield

blank

a shield

5

   

The two transmission lines are A and B. For a regular line A allways connects to B and v.v. The minus allways connects to another minus and the plus is connected to the other plus.


Pinout of the cable connector parts

firewire 4pin connector firewire 6pin connector firewire 9pin connector
4 pin Camera type 6 pin regular type 9 pin 800 type

All connectors drawn with exterior facing you


Firewire cable construction

firewire cable construction


This page ©2005 swc. made on mac