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  2. Highway Addressable Remote Transducer Protocol - Wikipedia

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

    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 transition protocol for users who ...

  3. List of video connectors - Wikipedia

    en.wikipedia.org/wiki/List_of_video_connectors

    Became a nearly ubiquitous analog computer display connector after first being introduced with IBM x86 machines. Older VGA connectors were DE-9 (9-pin). The modern DE-15 connector can carry Display Data Channel to allow the monitor to communicate with the graphics card, and optionally vice versa. [1] Being replaced by DVI from 1999 onward. DB13W3

  4. 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 ...

  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. VESA Digital Flat Panel - Wikipedia

    en.wikipedia.org/wiki/VESA_Digital_Flat_Panel

    P&D combined analog and digital video with data over USB and FireWire to reduce cable clutter, but the feature creep resulted in an unpopular, expensive connector. [2]: 4 Compaq described DFP as a "transition" step between the analog VGA connector and P&D: DFP was designed by a consortium including Compaq, Hewlett-Packard, and ATI Technologies as a smaller, simpler connector, dropping support ...

  7. Category:Digital display connectors - Wikipedia

    en.wikipedia.org/wiki/Category:Digital_display...

    This is the category for digital display connectors. Pages in category "Digital display connectors" The following 28 pages are in this category, out of 28 total.

  8. VT220 - Wikipedia

    en.wikipedia.org/wiki/VT220

    The VT200s were the last DEC terminals to provide a 20mA current loop serial interface (using a 8-pin Molex-style connector), an older standard originally developed for the telegraph system but became popular on computers due to the early use of Teletype Model 33's as ad hoc terminals. A standard 25-pin D-connector was also provided for RS-232.

  9. VESA Plug and Display - Wikipedia

    en.wikipedia.org/wiki/VESA_Plug_and_Display

    In addition to the regular P&D connector, the standard also specifies a 40-pin microribbon connector, which is only defined when making digital video connection via P&D-D. [1]: §10.3 The P&D port is sometimes mistaken as an alternative form of the Apple Display Connector , [ 3 ] but ADC carries higher current, has different pin layout, and ...