I have a couple of switches connected in series with a load. The load remains energized until one of the switches breaks the circuit. The circuit is supplied with 110 Vac or 220 Vac.
I want to add one extra conductor in the circuit, and manipulate the AC electrical signal to generate some sort of identifiable address on this conductor. This address needs to be identified by a separate circuit board, and stored in a mod-bus register.
The last switch may be far away (<500 meters), and there may be more than 20 switches on one circuit.
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I am a professional embedded engineer. I am currently working on a smart energy meter project with PLC. I think I can help you with that knowledge. Need more clarifications about your project. Please message me.