Hello,
I have the Beaulieu 2008 Reflex Control model with the single contact in the center and the ground contact on the side.
It was supplied with a wire to connect it to a battery. I'm not sure where it's from, but it does say "Made in Germany", so I'm thinking it could be an old model from Chambless or Wittnauer. The other side of the wire has a 6-pin DIN connector with the center pin broken off. There are a red and yellow wire each soldered to a separate contact, and a green and blue wire soldered together to another contact.
I'm wanting to make a battery pack for this, either by using a female DIN plug or cutting off the DIN output and connecting the red/black wires from the battery pack directly. I've already figured out that I need two separate 2.4v packs, with 4.8v going to one contact and 2.4v going to another. What I need help with is figuring out what each wire from the dummy battery represents. I am thinking that the green and blue wires soldered to 1 contact are for 4.8v, and either the red or yellow is for 2.4v and the other is ground, but I can't find any corresponding information when I'm looking up wire color codes for Germany.