Thread: AM882 Alarm Circuit
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28-03-2014 #7
Last Activity: 21 Hours Ago
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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