# Is it possible to use the EX controller with the Huanyang VFD? **URL:** \ **Category:** General Chat\ **Created:** [May 11, 2026, 7:24pm UTC](https://forum.avidcnc.com/t/is-it-possible-to-use-the-ex-controller-with-the-huanyang-vfd/6130 "2026-05-11T19:24:01Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![Tsingtao\_1903](https://avatars.discourse-cdn.com/v4/letter/t/dec6dc/32.png) [@Tsingtao\_1903](https://forum.avidcnc.com/u/Tsingtao_1903)\ **Post date:** [May 11, 2026, 7:24pm UTC](https://forum.avidcnc.com/t/is-it-possible-to-use-the-ex-controller-with-the-huanyang-vfd/6130/1 "2026-05-11T19:24:01Z")
In the process of installing the EX controller to a non-Avid CNC machine. I have the 1x14 conductor cable and the 1x14 pin panel mount. Is there an adapter or method to convert the 1x14 pin panel mount to RS485 for the Huanyang VFD? ---
**Author:** ![Eric](https://yyz1.discourse-cdn.com/flex027/user_avatar/forum.avidcnc.com/eric/32/3220_2.png) [@Eric](https://forum.avidcnc.com/u/Eric)\ **Post date:** [May 11, 2026, 10:18pm UTC](https://forum.avidcnc.com/t/is-it-possible-to-use-the-ex-controller-with-the-huanyang-vfd/6130/2 "2026-05-11T22:18:00Z")
The Acorn itself doesn’t do RS485, your best bet is to re-configure the VFD to accept 0-10 volt analog for speed control. Also, do you know we publish our schematics: [Schematics - EX Controller Technical Manual](https://www.avidcnc.com/support/instructions/electronics/ex/manual/stepper/24.1/schematics/) ---
**Author:** ![Tsingtao\_1903](https://avatars.discourse-cdn.com/v4/letter/t/dec6dc/32.png) [@Tsingtao\_1903](https://forum.avidcnc.com/u/Tsingtao_1903)\ **Post date:** [May 11, 2026, 11:05pm UTC](https://forum.avidcnc.com/t/is-it-possible-to-use-the-ex-controller-with-the-huanyang-vfd/6130/3 "2026-05-11T23:05:46Z")
Right. Figured out the Acorn does not do RS485. Started to map the 1x14 schematic to the Huanyang. Figured out most except for ConnectorPin #1 and #2. #1 is Fault Ground. #2 is Fault Signal. What are the conditions to trigger fault ground and fault signal? Thanks. ---
**Author:** ![MichaelR](https://avatars.discourse-cdn.com/v4/letter/m/6a8cbe/32.png) [@MichaelR](https://forum.avidcnc.com/u/MichaelR)\ **Post date:** [May 12, 2026, 3:47am UTC](https://forum.avidcnc.com/t/is-it-possible-to-use-the-ex-controller-with-the-huanyang-vfd/6130/4 "2026-05-12T03:47:00Z")
Look at using parameter PD050 / 51 / 52 set to 3 for fault condition with one of the outputs. The two pins should be closed under normal running condition. You’d want normally closed and for the output to open in a fault condition. ---
**Author:** ![naPS](https://avatars.discourse-cdn.com/v4/letter/n/76d3ee/32.png) [@naPS](https://forum.avidcnc.com/u/naPS)\ **Post date:** [May 17, 2026, 1:49am UTC](https://forum.avidcnc.com/t/is-it-possible-to-use-the-ex-controller-with-the-huanyang-vfd/6130/5 "2026-05-17T01:49:38Z")
I don’t believe the Huyang has a fault signal, and you’d set your Acorn to ignore VFD faults in the config. ---
**Author:** ![PaulC](https://avatars.discourse-cdn.com/v4/letter/p/e9a140/32.png) [@PaulC](https://forum.avidcnc.com/u/PaulC)\ **Post date:** [May 17, 2026, 7:24pm UTC](https://forum.avidcnc.com/t/is-it-possible-to-use-the-ex-controller-with-the-huanyang-vfd/6130/6 "2026-05-17T19:24:45Z")
If you don’t have a vfd fault you might need to flip a dip switch in the EX controller. I had to do this on the EX with servos. Don’t know if it applies to Nema EX. ---
**Author:** ![naPS](https://avatars.discourse-cdn.com/v4/letter/n/76d3ee/32.png) [@naPS](https://forum.avidcnc.com/u/naPS)\ **Post date:** [May 23, 2026, 5:08am UTC](https://forum.avidcnc.com/t/is-it-possible-to-use-the-ex-controller-with-the-huanyang-vfd/6130/7 "2026-05-23T05:08:45Z")
I didn’t have to flip a switch, and I’m on servos.