Results 1 to 5 of 5

Thread: 72V POE

  1. #1
    Junior Elf member
    Join Date
    Oct 2017
    Posts
    13

    72V POE

    Hi, I was wondering if anyone else is using up to 72VDC on ethernet cable. I'm using a DC-DC that runs 18-75VDC in and 5VDC 2 amps out, and am going to run 25 pixels on each. I also made my own board that has 2 RS-485 transceivers on it to allow me to daisy chain up to 6 elements on a single output.

  2. #2
    DIGWDF Engineer member dirknerkle's Avatar
    Join Date
    Nov 2011
    Location
    Plymouth, MN USA
    Posts
    10,261
    You're really pushing it with 72v. Highest limit I've ever seen is 57v. The problem is that the thin insulation on those little wires doesn't afford much voltage isolation. As far as current capability goes, the longer the wire, the less current it will handle, too.
    Even though the DIGWDF Store has closed, it's still awesome! Thanks to all who have supported us through nearly 7 years of excitement!
    Parts of the store will remain open for downloading documentation, firmware and other files: http://digwdf.com/store


  3. #3
    Old Man Winter member ronp5683's Avatar
    Join Date
    Apr 2013
    Location
    Southern California
    Posts
    1,193
    I like the idea, note that a lot of the connectors are spec'd at 50V.

    I use 30V/32V, with some cheap DC to DC converters 5V@5A. I can drive 50 of one converter.

    https://www.aliexpress.com/item/3292...AbTest=ae803_3

  4. #4
    Junior Elf member
    Join Date
    Oct 2017
    Posts
    13
    I might stick to 48v, I was just getting excited over the max distances with 72v, but that's not overly necessary.

  5. #5
    DIGWDF Engineer member dirknerkle's Avatar
    Join Date
    Nov 2011
    Location
    Plymouth, MN USA
    Posts
    10,261
    Better safe than having to call the fire department.
    Even though the DIGWDF Store has closed, it's still awesome! Thanks to all who have supported us through nearly 7 years of excitement!
    Parts of the store will remain open for downloading documentation, firmware and other files: http://digwdf.com/store


Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •