Comments on: Remote Powering over communications cabling (part 1)

By: Tomi Engdahl

Tomi Engdahl — Mon, 17 Jan 2022 09:09:02 +0000

How to Boost Power Density in Automotive Systems
Jan. 5, 2022
More vehicle weight leads to lower miles per gallon in fossil fuels and more frequent charging in electric vehicles. Thus, power density of power supplies and batteries is a crucial factor in optimizing automotive performance.
https://www.electronicdesign.com/power-management/whitepaper/21213209/electronic-design-how-to-boost-power-density-in-automotive-systems?utm_source=EG%20ED%20Analog%20%26%20Power%20Source&utm_medium=email&utm_campaign=CPS220105016&o_eid=7211D2691390C9R&rdx.ident%5Bpull%5D=omeda%7C7211D2691390C9R&oly_enc_id=7211D2691390C9R

Automotive applications are becoming more sophisticated as they trend well beyond two or three LED drivers per automobile. Smaller inductors built with the latest advanced technology like thin-film metal lead to improved power density in the automobile. Bias-T and power-over-coaxial (PoC) circuits also use inductors that have high-impedance characteristics and lead to improved power density

By: Tomi Engdahl

Tomi Engdahl — Mon, 20 Aug 2018 15:09:02 +0000

Superior Essex adds telco OSP hybrid cable
https://www.cablinginstall.com/articles/pt/2018/08/superior-essex-adds-telco-osp-hybrid-cable.html?cmpid=enl_cim_cim_data_center_newsletter_2018-08-20&pwhid=6b9badc08db25d04d04ee00b499089ffc280910702f8ef99951bdbdad3175f54dcae8b7ad9fa2c1f5697ffa19d05535df56b8dc1e6f75b7b6f6f8c7461ce0b24&eid=289644432&bid=2212288

Superior Essex has introduced a telco outside plant (OSP) hybrid cable optimized to support Class 2 line powering of remote devices while supplying data over fiber-optic cable. The fiber cable targets next-generation small cell deployments and rural CAF-II projects using digital subscriber line access multipliers (DSLAMs) and passive optical network (PON
) systems.

The cables can also be used in both brownfield and greenfield applications, boasting 25 pairs of 22 AWG twisted copper pairs and up to 192 optical fibers.

Superior Essex launches telco OSP hybrid cable
https://www.lightwaveonline.com/articles/2018/08/superior-essex-launches-telco-osp-hybrid-cable.html

By: Tomi Engdahl

Tomi Engdahl — Mon, 18 Jun 2018 11:10:33 +0000

http://www.epanorama.net/newepa/2012/05/02/high-power-poe-and-hdbaset/

By: Tomi Engdahl

Tomi Engdahl — Mon, 18 Jun 2018 11:06:41 +0000

https://www.uusiteknologia.fi/2018/06/12/ethernetista-myos-sahkoa-lue-tekniikka-artikkeli/

By: Tomi Engdahl

Tomi Engdahl — Sun, 17 Jun 2018 09:36:44 +0000

http://www.ieee802.org/3/poep_study/public/mar05/peker_1_0305.pdf

Electrical Energy related hazards
– Hazardous energy level:
240VA or more for 60 s or more, or
Stored energy of 20J or more, at a potential of 2V or more

Fire hazards
– IEEE802.3af addresses this issue by requiring ports to comply with
the requirements for a Limited Power Source (LPS), i.e., <100W
(Sub-clause 2.5 of IEC 60950-1)
POEplus standard should keep LPS requirement too.
– Protection of the telecommunication wiring from overheating and
catching fire is achieved by limiting the max current (Sub-clause
6.3 of IEC 60950-1).
The maximum current should not exceed a current limit for
specific wire gauge.
The current limit is 1.3A if such wiring is not specified.