>
>
> Interesting that it showed up at a current as high as 2mA, but I suppose
> the contact pressure was very slight in a breakage sensor. What was the
> approximate voltage on the contact, Dave?


Gads I don't remember.

The circuit was pretty interesting, they had the alarm loop configured as
one leg of a wheatstone bridge, with a pair of optoisolators across the
center, to kick the logic.   The logic counted a settable number of pulses
within a settable amount of time, and if exceeded, toggled a relay with form
C outputs.
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