What is the Stepper Motor Cable RJ45 to DB9 used for?
This cable is designed to connect a Pegasus Astro controller (or other controller with an RJ45 stepper output) to a focuser motor that uses a DB9 input. It is specifically wired for compatibility with Robofocus, MoonLite, and Lakeside stepper motor systems.
Will this Stepper Motor Cable work with any focuser motor?
No. Stepper motor cables have different internal wiring (pinouts). This cable is specifically designed for the pinout used by Robofocus, MoonLite High Resolution Stepper Motors, and Lakeside Motors. Using it with an incompatible motor could cause damage or simply fail to work.
Is the 1.8m length of this Stepper Motor Cable long enough for a large SCT?
A length of 1.8 meters (approximately 5.9 feet) is generally sufficient for most telescope setups, including Schmidt-Cassegrains (SCTs). It allows for flexible cable routing from a focuser mounted on the rear cell to a controller mounted on the dovetail or OTA, accommodating typical mount movement without pulling or snagging.
How do I connect the Stepper Motor Cable from my Pegasus UPBv2 to my MoonLite focuser?
Simply plug the RJ45 end of the cable into the designated "MOTOR" port on your Ultimate Powerbox v2. Then, connect the DB9 end to the corresponding input port on your MoonLite stepper motor controller. The custom pinout ensures the correct signals are passed for precise focus control.
Why does this cable have a DB9 connector instead of another RJ45?
The DB9 connector is a standard interface used by several popular high-end focuser motor manufacturers, including Robofocus and MoonLite. This cable acts as an adapter to make these focusers compatible with modern controllers that use the more compact RJ45 standard for their motor outputs.
Can I use an extender with this Stepper Motor Cable?
While possible, it is not recommended to extend stepper motor cables. Adding length can introduce signal degradation or electrical noise, which may affect the precision and reliability of your autofocusing routines. It is best to use a single cable of the appropriate length, like this 1.8m version.
