You can use with Robofocus and Moonlite motors among others.
DB9 cable is currently wired to suit “Robofocus” motors.
Good entry in ASCOM focus controllers and far cheaper than Robofocus!
Details:
https://astro-gadget.net/gadgets/con.../focusdreampro
Mint/as new and never used on telescope. $90 shipped.
I’ve also thrown in a Belkin serial-to-USB. Not required for this focuser controller - just a freebie/not required.
