[time-nuts] FE-5682A coming, any info?

[Ziggy]

The -48V RTN should be the 'positive' side and the POWER -48V should be 
the 'negative' side. On normal installations the -48V is a black wire, 
the -48V return is a red wire. It's like having a 'positive ground'. 
(I've used, manufactured, sold, and installed 48V Telco gear.) On most 
Telco gear both are isolated from earth ground - but you should check. A 
current limited supply would be nice for initial startup, but I don't 
think you'll have any issues. You should in any case, fuse it.

Ziggy

On 11/21/2012 09:10 AM, Fabio Eboli wrote:
> Thank you, Peter and Paul.
> Now I see that the pinout is almost identical
> to LPRO-101, the only difference are pins
> 8 and 10 for power supply.
> That's nice, I like the external C-Field control,
> and monitor voltage for lamp, they can be useful.
>
> I'm not familiar with telco power supplies,
> I know only that they used 48V with positive
> to ground.
>
> So the supply should be 48V, positive
> to pin 8 and negative to 10 ?
>
> Should I expect the GND to be connected to pin
> 8? Or it will be floating at middle voltage
> (hence the 19 to 32V rating), in this case
> all I need will be a dual 24V psu.
>
> Fabio.
>
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