Which version of software/electronics do I have? What control panel do I need?

We currently have two versions of software available.

Version A is our original software and Version B is the updated software. The easiest and simplest way to tell what software you have or what control panel you’ll need is to check the wire that connects from the back of the panel to the motherboard. The wire for version A will be a flat, wide ribbon cable(16pin). For version B, there will be a small data cable (4pin).