I’m not 100% sure what you’re trying to do, but if you’re trying to build a cable that connects a RS-232 serial port, to a Dover DMC system, buy these four items from Amazon using the links below. This is how the cable needs to be made.
5-black,
7-brown,
9-red,
11-orange
https://a.co/d/00W4mVkPhttps://a.co/d/0bzKffD2https://a.co/d/0hn6KZRrhttps://a.co/d/04FWTFupIf your computer doesn't have the serial port. And you're using a USB to RS232. Converter you don't need to buy. The 4th item, which is just a cable extension.
The orange cable only has two wires and is used specifically to connect to the door operator when using the Door FAST program. It cannot be used to connect to the multi-drop system, selector, or CLC board because those connections require more than two wires.
There is software available online that reconfigures the port on the back of the computer, allowing the orange cable to work properly with the Door FAST program.
