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  2. Current loop - Wikipedia

    en.wikipedia.org/wiki/Current_loop

    The 420 mA convention was born in the 1950s out of the earlier highly successful 3–15 psi pneumatic control signal standard, when electronics became cheap and reliable enough to emulate the older standard electrically. The 3–15 psi standard had the same features of being able to power some remote devices, and have a "live" zero.

  3. Highway Addressable Remote Transducer Protocol - Wikipedia

    en.wikipedia.org/wiki/Highway_Addressable_Remote...

    Layers 3–6 are not used. [1] When sent over 420 mA it uses a Bell 202 for layer 1. But it is often converted to RS485 or RS232. According to Emerson, [2] due to the huge installation base of 420 mA systems throughout the world, the HART Protocol is one of the most popular industrial protocols today. HART protocol has made a good ...

  4. Digital current loop interface - Wikipedia

    en.wikipedia.org/wiki/Digital_current_loop_interface

    A digital current loop uses the absence of current for high (space or break), and the presence of current in the loop for low (mark). [1] This is done to ensure that on normal conditions there is always current flowing and in the event of a line being cut the flow stops indefinitely, immediately raising the alarm of the event usually as the heavy noise of the teleprinter not being synchronized ...

  5. Circuit diagram - Wikipedia

    en.wikipedia.org/wiki/Circuit_diagram

    A circuit diagram (or: wiring diagram, electrical diagram, elementary diagram, electronic schematic) is a graphical representation of an electrical circuit. A pictorial circuit diagram uses simple images of components, while a schematic diagram shows the components and interconnections of the circuit using standardized symbolic representations.

  6. Three-phase electric power - Wikipedia

    en.wikipedia.org/wiki/Three-phase_electric_power

    A three-wire three-phase circuit is usually more economical than an equivalent two-wire single-phase circuit at the same line-to-ground voltage because it uses less conductor material to transmit a given amount of electrical power. [3] Three-phase power is mainly used directly to power large induction motors, other electric motors and other ...

  7. Your Cholesterol Could Be A Key Indicator Of Dementia. A ...

    www.aol.com/cholesterol-could-key-indicator...

    December 4, 2024 at 12:07 PM. How Your Cholesterol Could Indicate Dementia Risk Qi Yang - Getty Images. Typically, dementia is associated with classic symptoms like confusion and memory loss. But ...

  8. Wiring diagram - Wikipedia

    en.wikipedia.org/wiki/Wiring_diagram

    An automotive wiring diagram, showing useful information such as crimp connection locations and wire colors. These details may not be so easily found on a more schematic drawing. A wiring diagram is a simplified conventional pictorial representation of an electrical circuit. It shows the components of the circuit as simplified shapes, and the ...

  9. No, photo doesn't show migrants leaving NYC before Trump ...

    www.aol.com/no-photo-doesnt-show-migrants...

    The claim: Photo shows migrants leaving NYC for Canada ahead of Trump presidency. A Nov. 14 Facebook post (direct link, archive link) includes an image showing several people stepping off a bus ...

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