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  2. Current loop - Wikipedia

    en.wikipedia.org/wiki/Current_loop

    A major application of current loops is the industry de facto standard 420 mA current loop for process control applications, where they are extensively used to carry signals from process instrumentation to proportional–integral–derivative (PID) controllers, supervisory control and data acquisition (SCADA) systems, and programmable logic ...

  3. Orders of magnitude (current) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude_(current)

    10 −4: 700μA Portable hearing aid (typically 1 mW at 1.4 V) 10 −3: 1 – 5mA: Cathode ray tube electron gun beam current [2] 10 −2: 10mA Through the hand to foot may cause a person to freeze and be unable to let go [1] 20mA Common light-emitting diode (constant current); also deadly limit for skin contact (at 120–230 V) 80mA

  4. Highway Addressable Remote Transducer Protocol - Wikipedia

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

    The HART Communication Protocol (Highway Addressable Remote Transducer) is a hybrid analog+digital industrial automation open protocol. Its most notable advantage is that it can communicate over legacy 420 mA analog instrumentation current loops, sharing the pair of wires used by the analog-only host systems.

  5. 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 ...

  6. 4-20 mA - Wikipedia

    en.wikipedia.org/?title=4-20_mA&redirect=no

    Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply. By using this site, ...

  7. Diode modelling - Wikipedia

    en.wikipedia.org/wiki/Diode_modelling

    The scale current is proportional to the cross-sectional area of the diode. Continuing with the symbols: V T {\displaystyle V_{\text{T}}} is the thermal voltage ( k T / q {\displaystyle kT/q} , about 26 mV at normal temperatures), and n {\displaystyle n} is known as the diode ideality factor (for silicon diodes n {\displaystyle n} is ...

  8. Grimes Says She Didn't See One of Her Kids for 5 Months ... - AOL

    www.aol.com/lifestyle/grimes-says-she-didnt-see...

    The former couple is parents to sons X Æ A-Xii, 4, and Techno Mechanicus, 2, as well as daughter Exa Dark Sideræl, 3 Grimes Says She Didn't See One of Her Kids for 5 Months amid Year-Long ...

  9. 4-20mA - Wikipedia

    en.wikipedia.org/?title=4-20mA&redirect=no

    From Wikipedia, the free encyclopedia. Redirect page