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  1. rauval

    Nonincendive transmitters

    moltenmetal, Thank you for your tip. I am designing by NEC (NFPA 70), but I also found an FM approval standard 3611, which specifies calculations that have to be run in order to approve the entire system (transmitter+wiring) as nonincendive. I am going through it right now.
  2. rauval

    Nonincendive transmitters

    I am working on a design in a Class 1 Div 2 hazardous location. Have 10 Yokogawa pressure transmitters, 24 VDC supplied, loop powered, wired to an AB Contrologix PLC. The transmitter model I selected is rated as nonincendive (NI)for Class 1 Div 2 and intrinsically safe (IS)for Class 1 Div 1...

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