I try to connect a energy meter with the mp 2 gx, i used an original victron usb to rs485 cable, but it did blow the usb part. Now i read that i probably need an isolated converter, but why does victron sell those cables for it if they just destroy themselves?
And what converter do i need exactly? I did buy the original victron cable and another one, but both don’t work.
Hi
RS485 Converters break from time to time, claim via victron eorder https://eorder.victronenergy.com/customer/login/?next=/customer/home/ or via vendor.
third Party RS485 Converter must include FTI chip for Victron/Carlo Gavazzi Meters to work.
Tested: https://www.amazon.de/gp/product/B07Z1V5WQS/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
The normal end user has to contact his seller for a replacement.
What energy meter did you connect, and how?
Rj45 or wires?
Et112 with wires. That is how my converter now looks like.
This is how it is wired.
So you say it should just work with those victron rs-usb?
I have another one from victron, but i do not want to blow that one too, want to be sure it will work.
I never had a problem like that but I see you forgot to install the cover for the AC terminals, did you maybe touch the live or neutral wire with one of the RS485 wires by accident?
I connected the other usb-rs and the meter doesn’t show up.
That happened with the last lead too, the converter doesn’t show communication lights.
Last time i thought i give it some time, and then it will work. But that made it burn the converter.
If i touch the converter, it doesn’t get hot, but that was with the last one also, after a while it did get hot i guess, and found the mess shown above.
Any thoughts on how to get my et112 to show up on mp gx?
I found another post about it, that told me to connect the converter to a pc and change something in the name.
But when i plug it in a pc, it starts to get hot fast, and the cable isn’t recognized.
Are both of my cables faulty?
Or am i doing something wrong?
You might have killed the second adapter as well by connectig it without checking the conditions.
Maybe the Energymeter is faulty and the RS485 port has a too high voltage output. Or something else is not correct.
You could check the voltage level at the RS485 Pins of the energy meter. It should not exceed ~15V (as far as I remember).
Before checking the possible root causes, you should not connect another RS485-USB adapter. The outcome will, most probably, be the same.
Connecting it to the USB port itself, should not cause any damage, so I would guess the problem is on the RS485 side.
I contacted the seller, and they did send it through to victron. If i know more, i write it here. If there is someone else who has any ideas, please share them here.
Interesting, let us know what is the outcome.
