SXT G-5HPacD Does not power up on 12 Volt - SOLVED

RouterOS General
1

SXT G-5HPacD Does not power up on 12 Volt. Simply said. The voltage range on the data sheet is 8-30 volt.

All that happens is the green LED flashing next to the reset button..
This is being tested on a GEL battery. This batter voltage was at 12.5 when it was tested after charging. This battery powered on a NETMETAL5 just before and that device was accessible.
The cable and POE that was used to test the SXT G-5HPacD was tested with the supplied 24V adaptor. It powers up with this.

So, Now I own 5 SXT G-5HPacD that I cannot use in my 12 volt application. Thanks MT Does anyone actually test the operation of this before you sell them?

This is the same with SXT G-5HPacD-SA as well.

I am trying to find a different power supply that I can regulate and see at what voltage it comes on at.

NOTE: The Ethernet cable I am testing with is 4 feet long. The other one I tested with was 6 feet long. The test that worked and powered on the netmetal5 is about 60 feet long.

2

I edited that post, probably as you were responding. very short cable, 4 feet.

3

I am sorry that your application doesn’t work, but I just checked, and the “ac” SXT actually says 12-57V on the datasheet (PDF even indicates recommended 15-57V actually, because of potential voltage drop due to cable length): http://routerboard.com/RBSXTG-5HPacD

(also edited)

4

Hmm, did a few more quick tests…

I just tried with a 6 foot CAT6 cable, it did power up. Which got me thinking. I understand that voltage drops over long distances, but 4 feet long.
So, I looked at the cables closer that I originally tested with. both are straight patch cables, and they were 26 gauge. Didn’t work.
I found another cable that was 24 Gauge CAT5 and this powered on the device. Strange.

So I am not mad at you Normis :slight_smile: Just at my cheap 26 gauge cat 5 wire!

One day someone will read this and it will help them out. I am just surprised that size difference on such a short distance actually mattered.
I should point out that these two cables were “premade” with formed ends. It goes to show, if you want something done right, do it yourself.

I am still wondering why the other devices powered up with the 26 gauge wire. There was a NETMETAL5, and also a Cap2n worked. ( Same 4 foot cable to the cap2n, I think I tries some other RB, but there is quite a few on my desk so I cant remember which one it was.

My Project… I planned on getting a live youtube stream from RC aircraft at a remote site.. Still in the works… Will get photos and video when it happens. ( Too cold now)