On Sunday 03 February 2019 14:45:38 Peter C. Wallace wrote: > the nuts on those connectors which are below the boards in this box. > > Now in the next step of wiring this up I have a pair of 40 amp SSR's, > with 5.11+ on both + terminals of the SSR's, and am using > hm2_5i25.0.7i76.0.0.outputs 15 and 14 with the idea that turning them > on will ground the -terminals, enabling the SSR's in sequence, when > the first one is enabled, power is applied to the stack of toroids > thru a 50 ohm 200 watt resistor the start chargeing the filter caps, 3 > second later an identical signal is sent to > hm2_5i25.0.7i76.0.0.output14 which bypasses the 50 ohm resistor, > enabling the spindle psu at full power. > > I can see, with a halmeter that the signal is sent to those output > pins. > > But they aren't turning on to sink the - pins of the SSR's. They > regardless of the halmeter state, stubbornly sitting at 4.66+ which > would be about what I'd expect to see when I measure to ground/common > with a 10 megohm input DVM from the - terminals of the SSR controls. > Not enough current flowing thru the meter to tickle the SSR's of > course. I am wired to the last and next to last at the upper end of > TB5 which the docs say is output15 and output14. Field power on the > orange connector is 12.2 volts positive on pin 1, and negatives are > wired common between pin 8 of the orange connector and pin 24 of the 4 > pin header to its left. > > > > > Another common issue can be that you are not using the field power > common for the load common (note that the field I/O is galvanically > isolated from logic power so the load power common must connect to the > field power (orange connector) common > It is common. And has been all along.. > > Peter Wallace > Mesa Electronics > > (\__/) > (='.'=) This is Bunny. Copy and paste bunny into your > (")_(") signature to help him gain world domination. > > > > _______________________________________________ > Emc-developers mailing list > Emc-developers@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-developers
Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene> _______________________________________________ Emc-developers mailing list Emc-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-developers