On 22 January 2016 at 11:51, Erik Christiansen <dva...@internode.on.net> wrote:
>> I wanted to control the two clutches and the brake on my lathe >> gearbox. These have a single wire to a brush (24V) and return via the >> machine frame. > > s/These have/These each have/ ? Yes. > There is a way to use low-side switches. Burrow into each solenoid > device to isolate the frame return, and switch that. (I figure you've > already briefly considered that.) No, not even for a moment, as they are encapsulated lumps of steel, and only have one brush. >> I also don't think that it is particularly well suited to being driven >> by the 7i84 outputs. > > If the 7i84 won't take 24v, then a transistor and two resistors, per > output, fixes that. The 7i84 outputs are 5 to 28V sourcing drivers, it isn't the voltage that is the problem, it's the common positive on the control side of that relay module. -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto ------------------------------------------------------------------------------ Site24x7 APM Insight: Get Deep Visibility into Application Performance APM + Mobile APM + RUM: Monitor 3 App instances at just $35/Month Monitor end-to-end web transactions and take corrective actions now Troubleshoot faster and improve end-user experience. Signup Now! http://pubads.g.doubleclick.net/gampad/clk?id=267308311&iu=/4140 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
