PMDX Forum

General Category => SmartBOB controllers and dedicated accessories => Topic started by: broered on April 23, 2016, 12:38:03 PM

Title: PMDX-424 Source for Gecko 203V Disable Voltage
Post by: broered on April 23, 2016, 12:38:03 PM

Gecko 203V's have a disable terminal.  Their manual says that you can force winding currents to ZERO by connecting this terminal to the Step/Direction controller's +5V.

I'd like to tie all 4 of the 203V's disable terminals to a single switch, then to 5V, somewhere on the PMDX-424.

(1) can I tie all 4 of the 203V's disable terminals together without causing problems?
(2) what's the best place, on the PMDX-424, to get the 5V from?

thanks
Dave

Title: Re: PMDX-424 Source for Gecko 203V Disable Voltage
Post by: Bob at PMDX on April 23, 2016, 11:12:54 PM

Yes, you can tie the "Disable" input on all of the G203V drivers together.  The 5V to drive the "Disable" input can come from the "L+5V" terminal on J12 or J13.  These connector shares the same ground as the step/direction outputs.**

** NOTE: Well, the "ground" that can appear on the step/dir "com" terminal is not actually ground, but ground through a buffer IC.  So when the step/dir common is set to "ground", it may actually be a 1/10th or two above the "Lgnd" on J12 or J13.  But that is OK as far as the G203V is concerned.

Bob

Title: Re: PMDX-424 Source for Gecko 203V Disable Voltage
Post by: broered on April 25, 2016, 11:04:51 AM

Really pleased with all the technical information I'm getting from PMDX as I work my build.
Thanks again Bob!