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  2. Reference designator - Wikipedia

    en.wikipedia.org/wiki/Reference_designator

    A reference designator unambiguously identifies the location of a component within an electrical schematic or on a printed circuit board.The reference designator usually consists of one or two letters followed by a number, e.g. C3, D1, R4, U15.

  3. DIN 72552 - Wikipedia

    en.wikipedia.org/wiki/DIN_72552

    from 2nd battery and 12/24 V relay: 31 return to battery- or direct to ground 31a return to battery- 12/24 V relay 31b return to battery- or ground through switch 85d 31c return to battery- 12/24 V relay 31, 31a Electric motors; 32 return 31 33 main terminal (swap of 32 and 33 is possible) 30 33a limit 33b field 54e 33f 2. slow rpm: 33g 3. slow ...

  4. Relay - Wikipedia

    en.wikipedia.org/wiki/Relay

    A relay Electromechanical relay principle Electromechanical relay schematic showing a control coil, four pairs of normally open and one pair of normally closed contacts An automotive-style miniature relay with the dust cover taken off. A relay is an electrically operated switch. It consists of a set of input terminals for a single or multiple ...

  5. ANSI device numbers - Wikipedia

    en.wikipedia.org/wiki/ANSI_device_numbers

    Today, microprocessor-based relays can perform many protective functions in one device. [1] When one device performs several protective functions, it is typically denoted "11" by the standard as a "Multifunction Device", but ANSI Device Numbers are still used in documentation like single-line diagrams or schematics to indicate which specific ...

  6. Nanoelectromechanical relay - Wikipedia

    en.wikipedia.org/wiki/Nanoelectromechanical_relay

    A typical NEM relay requires a potential on the order of the tens of volts in order to "pull in" and have contact resistances on the order of gigaohms. Coating contact surfaces with platinum can reduce achievable contact resistance to as low as 3 kΩ. [1] Compared to transistors, NEM relays switch relatively slowly, on the order of nanoseconds. [2]

  7. Leichter Panzerspähwagen - Wikipedia

    en.wikipedia.org/wiki/Leichter_Panzerspähwagen

    It was only produced with Ausf. A chassis and a maximum frontal armour of 14.5 mm. Some Sd. Kfz 221 were rearmed with a 2.8 cm sPzB 41 heavy anti-tank rifle in a modified turret. Sd. Kfz. 222. This version of the vehicle was armed with a 2 cm KwK 30 L/55 autocannon and one MG 13 machine gun; full designation was Leichter Panzerspähwagen (2 cm ...