48VH POE Extractor/Splitter

[yahel]

I need to power a Netonix DC switch (WS-8-150-DC) from another Netonix.
Since this switch does not have a POE-in like the Netonix-Mini, I would need some sort of POE-extractor.

Most off the shelf extractors would not support the 48VH.

Since I don't need this port for data, can I just short pins pins 1,2,4,5(+) for the positive, and pins 3,6,7,8(-) for the negative?
Or do I have to use 4-way center-tap transformer and a diode bridge?

Anyone know of an off-the-shelf device to do this?

Thanks,

Yahel.

PS - I'm aware that 48VH would provide a maximum of 1.5A, which at 48V is 72W --- less than half of what the WS-8-150-DC can handle - but that's fine, it would only need to power 3 AirMax devices, which are well below 40W, and the switch itself.

[lligetfa]

I think you did not factor for inrush current which I think would be too much for the port.

[yahel]

In-rush cause by the 2nd Netonix switching being powered by the first?
Do we know there would be an in-rush surge that is so meaningful or are we guessing?

[lligetfa]

You don't have to take my word for it. Search the forum for "inrush" and you will find where Chris says to allow for 300W of inrush.

[uberdome]

I may have missed the right post, but the inrush concerns I saw were referring to AC powered units.

I had the same question as the OP, but using two separate 48VH ports to help keep current draw low (I'm only using about 35 Watts total). I've got a site that already has 2x Cat5e running up to a steeple, so I'm debating whether to use a Netonix at the base running up to a Netonix at the top, or if I need to run separate injectors / separators to get power to the top.

[Omniflux]

I realize you are probably no longer looking for this, but for anyone searching, this is what you were looking for:

Tycon Systems POE-INJ-1000-DINX

Make sure you get a power cable to go with it, either part number 5700049 or 5700035

[lligetfa]

The POE-INJ-1000-DINX has reverse polarity on one of the pairs. Power is supplied on all 8 Ethernet pins 3,6,4,5(+) and 1,2,7,8(-).

The POE-INJ-1000-DIN (without the X) is pinned the same as the VH ports. Power is supplied on all 8 Ethernet pins 1,2,4,5(+) and 3,6,7,8(-).

[Omniflux]

You are correct, I will have to go back and review the one I have in use to see why my use case must be different from this.

Unfortunately, the POE-INJ-1000-DIN does not appear to work as a splitter or at least is not marketed as such.

[lligetfa]

Unfortunately, the POE-INJ-1000-DIN does not appear to work as a splitter or at least is not marketed as such.

I was told by an EE who uses them that it works both ways.

[uberdome]

For reference for the thread, with the info from lligetfa I ended up finding what I'm looking for:

High PoE 4 Pair Injector / Splitter Item# POE-INJ-1000-WT
http://tyconsystems.com/index.php/passi ... nj-1000-wt

It has screw terminals instead of the DIN connector, it has the same pinout as Netonix 48VH and they are quite inexpensive. I'm going to pickup a few for testing.

I was going to run 2 lines up to use this to power a DC Netonix and run a LAG connection, but I decided instead to power two WS-6-MINI switches on an ERPS loop, so I won't be using these on this particular project.