Keypad wiring, quick informational post.

I bought a couple of keypads of Ebay some time ago and since they were so nice, I decided to use them in my latest project. Since there are no data sheets for this, that I could find, I checked the wiring myself. The unit is from Bally systems, made by ACT and has P/N 105123D

Here are a couple of images of the unit.

And here’s a connection table. Keep in mind that the connections range in resistances from 30 to 100 Ohms.

Pin 1 Pin 2 Pin 3
Pin 4 CLR 0 ENT
Pin 5 3 6 9
Pin 6 2 5 8
Pin 7 1 4 7

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