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  2. Power over Ethernet - Wikipedia

    en.wikipedia.org/wiki/Power_over_Ethernet

    Passive DC-to-DC injectors also exist which convert a 9 V to 36 V DC, or 36 V to 72 V DC power source to a stabilized 24 V 1 A, 48 V 0.5 A, or up to 48 V 2.0 A PoE feed with '+' on pins 4 & 5 and '−' on pins 7 & 8. These DC-to-DC PoE injectors are used in various telecom applications. [58]

  3. Coaxial power connector - Wikipedia

    en.wikipedia.org/wiki/Coaxial_power_connector

    9.0 12VDC @ 0.5A Marushin Electric MP-138NK ... Used in Acer Aspire V5 adapter and some Hikvision 48V NVRs 5.50 2.10 M CUI Inc. P5 CUI Inc. PP3–002A Kobiconn 3217 ...

  4. EIAJ connector - Wikipedia

    en.wikipedia.org/wiki/EIAJ_connector

    This is a unique-looking barrel connector, apparently intended for providing a DC output jack (most DC jacks are used for power input).. Possibly available in multiple voltage ranges, the one for voltage classification 2 (3.15 to 6.3 V) has an outside diameter of 4.75 mm and a protruding pin of 2.5 mm diameter.

  5. Ubiquiti - Wikipedia

    en.wikipedia.org/wiki/Ubiquiti

    Ubiquiti Inc. (formerly Ubiquiti Networks, Inc.) [3] is an American technology company founded in San Jose, California, in 2003. [ 1 ] [ 4 ] Now based in New York City , [ 5 ] Ubiquiti manufactures and sells wireless data communication and wired products for enterprises and homes under multiple brand names.

  6. Power dividers and directional couplers - Wikipedia

    en.wikipedia.org/wiki/Power_dividers_and...

    A 10 dB 1.7–2.2 GHz directional coupler. From left to right: input, coupled, isolated (terminated with a load), and transmitted port. A 3 dB 2.04.2 GHz power divider/combiner. Power dividers (also power splitters and, when used in reverse, power combiners) and directional couplers are passive devices used mostly in the field of radio ...

  7. Phantom power - Wikipedia

    en.wikipedia.org/wiki/Phantom_Power

    The signal conductors are positive, both fed through resistors of equal value (6.81 kΩ for 48 V, 1.2 kΩ for 24 V, and 680 Ω for 12 V), and the shield is ground. The 6.81 kΩ value is not critical, but the resistors must be matched to within 0.1% [6] or better to maintain good common-mode rejection in the circuit. The 24-volt version of ...

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