Re: Pixie error connection

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "toolspindoctor"
<clarkfamily5@...> wrote:

>
> Graham,
>
> I am trying to drive a Dayton Solid State Relay, Input DC, Maximum
> Input Voltage 32 VDC, Minimum Input Voltage 3.5 VDC, Output DC,
> Minimum Output Voltage 0 VDC Grainger part #5Z950. Probably too much
> draw and it drops the Pixie to 0volts each time I connect. Must be a
> way to place a resistor...
>
> Thanks,
> Keith

In mentions opto coupling so am I right that the "coil" has a polarity?

If so connect the + to 5v and the negative to the pixie. That way
when the pixie pulls the output low the led in the opto will be energized.

Connecting the relay the other way will tend to pull the pixie down to
ground and cause the fault.

Please apply a pinch of salt as I have not used SS relays but I think
I am right.

Graham