Another model to check is RB1100AHx4, it has 2 AC inputs and 1 DC input and 
might be polarity agnostic.  That’s an ARM model and I don’t think it’s 
discontinued.

 

From: AF <[email protected]> On Behalf Of Josh Luthman
Sent: Monday, June 23, 2025 11:09 AM
To: AnimalFarm Microwave Users Group <[email protected]>
Subject: Re: [AFMUG] Mikrotik on -48VDC

 

I have 3 of them on my shelf.  Happy to let 2 of them go.

 

On Mon, Jun 23, 2025 at 12:05 PM Ken Hohhof <[email protected] 
<mailto:[email protected]> > wrote:

The trick is finding them in stock.  I think I bought several of them a couple 
years ago from Linktechs.

 

From: AF <[email protected] <mailto:[email protected]> > On Behalf 
Of Adam Moffett
Sent: Monday, June 23, 2025 10:53 AM
To: AnimalFarm Microwave Users Group <[email protected] <mailto:[email protected]> >
Subject: Re: [AFMUG] Mikrotik on -48VDC

 

Yeah, I just found that on their website.  I didn't know they sold this.

  _____  

From: AF <[email protected]> on behalf of castarritt 
<[email protected] <mailto:[email protected]> >
Sent: Monday, June 23, 2025 11:32 AM
To: AnimalFarm Microwave Users Group <[email protected] <mailto:[email protected]> >
Subject: Re: [AFMUG] Mikrotik on -48VDC 

 

The PW48V-12V85W power board can take -48vdc.  Many of the CCR series can 
accept that PSU.

 

On Mon, Jun 23, 2025 at 10:25 AM Adam Moffett <[email protected] 
<mailto:[email protected]> > wrote:

Are there are any Mikrotik models that definitely work with positive ground?  I 
know I can use an isolated converter, but it would make me happier if I don't 
need one.

 

-Adam

 

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