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    Safety PLC - 2oo3 loop considerations for Boiler PLC as per NFPA85

    Hi All, I want to know about what NFPA 85 standard says regarding configuration of 2oo3 logic for a safety PLC. Particularly, if there are 2 out of 3 transmitters/switches installed in a boiler for any tripping security (like furnace draft, inlet header pressure etc.), is it necessary to connect...
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