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atomicduck
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CRS112 just died on me - 48V connection an issue?

Sun May 01, 2022 1:55 pm

CRS112 just died on me. It doesn't want to turn on.

I needed to move it, and I disconnected power - not 100% sure, but I think I first disconnected default 24V, leaving 48V PS. Later on the switch doesn't power up at all.

There is nothing in documentation that I noticed regarding this. Have I made an error that killed my switch?

I tried opening it to see if anything was burned inside, and no component looked like it died.

Any info on this?
 
biomesh
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Re: CRS112 just died on me - 48V connection an issue?

Sun May 01, 2022 2:35 pm

It should not matter. I would try with one power supply at a time, if you have different ones, try those.

From your description, this is the poe version of the switch, if it was not then you could also try to power via poe in.
 
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atomicduck
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Re: CRS112 just died on me - 48V connection an issue?

Sun May 01, 2022 2:38 pm

It should not matter. I would try with one power supply at a time, if you have different ones, try those.

From your description, this is the poe version of the switch, if it was not then you could also try to power via poe in.
Yes, this is PoE version, CRS112-8p-4s-IN.

I tried with only 24V, 48V, and different 24V PS (I have another CRS112 here) and it didn't work.

So it is dead and that's it?
 
biomesh
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Re: CRS112 just died on me - 48V connection an issue?

Sun May 01, 2022 2:44 pm

If it's under warranty, I would rma it. if not, perhaps someone else can give you things to check on the board itself for repairs.
 
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atomicduck
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Re: CRS112 just died on me - 48V connection an issue?

Sun May 01, 2022 2:48 pm

If it's under warranty, I would rma it. if not, perhaps someone else can give you things to check on the board itself for repairs.
It is under warranty. Will return it!

Just curious, is the 48V adapter supposed to be able to power the device alone, or it _requires_ 24 AND 48 volt PS'es?
 
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Znevna
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Re: CRS112 just died on me - 48V connection an issue?  [SOLVED]

Sun May 01, 2022 2:55 pm

It's in the manual: https://help.mikrotik.com/docs/display/ ... g-Powering
You can use either one or both inputs at the same time. This will also affect the PoE output functionality
Last edited by Znevna on Sun May 01, 2022 5:10 pm, edited 1 time in total.
 
biomesh
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Re: CRS112 just died on me - 48V connection an issue?

Sun May 01, 2022 2:56 pm

The device can run on either voltage to power the device. The device will use the highest voltage connected to it to power itself though.
 
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atomicduck
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Re: CRS112 just died on me - 48V connection an issue?

Sun May 01, 2022 2:57 pm

Thanks guys.

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