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  1. 28-03-2014 #7
    Neale's Avatar
    Lives in Plymouth, United Kingdom.
    Neale
    Last Activity: 18 Hours Ago Has a total post count of 1,746. Received thanks 297 times, giving thanks to others 11 times.
    I'm sure that there is something wrong with that Leadshine circuit. The "R" for the alarm circuit should not be 0 for the 5V case. That would short out the 5V supply when the alarm went off, followed by the demise of the opto-isolator microseconds later. What you should use as a pull-up will depend on what is in the block on the left. Personally, I would put the 24V relay where R sits, connect alarm outputs in parallel, and corresponding terminals to 24V ground, but it's 6 of one and half-a-dozen of the other and the other suggestions would work fine.
    Last edited by Neale; 28-03-2014 at 01:55 PM.
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