Infineon Hookup Help!

[eganwp]

Hey guys,

Finally getting around to finishing my modified 72V e-scooter with my new Cellman 12FET Infineon controller but need your help. The infineon controller has a (+ and -) main battery power input wires, however, the stock controller has main power input wires (+ and -) also have a third smaller gauge yellow (+) wire as well. Can I just solder this 3rd wire (+) to the main gauge + wire for input to the Infineon controller for power?

I haven't pulled apart all the sleeving to see where this small yellow wire goes, but it looks to run up to the dash. Maybe to the ignition key or the 12V dc-dc converter? It does have the same battery voltage (+) as the main positive wire from the battery, hence me wondering if I can just solder it together?


Thanks guys. I'm sur tons of people have run into this question, so thanks for your help!

 

[dogman dan]

You should be able to connect that wire to the main +. Or run it through a switch on the way if you wish.

 

[eganwp]

Thank you very much Dogman. Much appreciated. Paul (cellman) also sent me an email with the same answer.

Cheers!
Travis

 

[eganwp]

Got a question on this again. That + yellow wire that I was going to just solder to the main + lead does in fact come from the key ignition and carries battery voltage when key is on, 0V when key is off. My issue is that my Cellman 12FET Infineon controller has 2 red ignition wires (use a switch or join to jump them) unlike the original controller which only had one ignition wire that it connected to.

How do I connect these two controller ignition wires to the bike's single key ignition wire so the key works properly? Can I connect one of them to the yellow wire and the other to the main + lead? Or how is everyone else doing this? I can't find the answer in hours of searching.

 

[dogman dan]

The big red wire goes straight from the controller to the battery +. The little red wire goes from the controller, through the switch, then to the battery+

That way when you turn the switch off, the controller switches off too, even though the big main wire is still connected. If you store the bike for a long period, unplug the big wire too. But overnight, you can just use the switch.

 

[eganwp]

Thanks dogman. I understand exactly what you mean, but what I don't understand is how to do this on this 12 FET because it has TWO ignition wires coming from the controller, not one like my old one. With one wire it makes complete sense to put a switch in series between it and be main + lead. But with two, I do not understand how to connect two wires into the single key ignition wire. I understand that bridging the two ignition wires obviously works, or adding a switch between the two ignition wires also works on the new controller, but don't understand how to wire it to work with the single key ignition wire working with two ignition controller wires.