You are probably right.  I have the question into the factory about the MX 
series.  I don’t recall the output terminals indicating they were referenced.  

From: Ken Hohhof 
Sent: Monday, November 26, 2018 5:06 PM
To: 'AnimalFarm Microwave Users Group' 
Subject: Re: [AFMUG] Eltek Valere J series -48 or +48

I don’t know about J series, but their Micropack series is -48V.  I seem to 
remember because of the control circuitry.

 

From: AF <af-boun...@af.afmug.com> On Behalf Of ch...@wbmfg.com
Sent: Monday, November 26, 2018 4:56 PM
To: AnimalFarm Microwave Users Group <af@af.afmug.com>
Subject: Re: [AFMUG] Eltek Valere J series -48 or +48

 

It is 48.  Period.  You choose the reference if you want one.  

 

If you tie the + terminal to chassis ground then the – terminal is the hot –48 
VDC terminal.

 

If you tie the – terminal to chassis ground then the + terminal is the hot +48 
VDC terminal.

 

If you don’t tie either to chassis ground, then you will have to have a common 
return bar that is on the opposite rail from your fuses and circuit breakers.  

 

From: TJ Trout 

Sent: Monday, November 26, 2018 3:40 PM

To: AnimalFarm Microwave Users Group 

Subject: [AFMUG] Eltek Valere J series -48 or +48

 

I'm looking at the Valere series and I can't seem determine if it's +48 or -48, 
seems like it's +48 but I thought all the telecom stuff was positive ground. 

 

How do you go about powering negative ground loads from a positive ground power 
source?

 

I'm assuming you can leave out the neutral and isolate the chassis? 

 

 


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