Measure both pins and see if 1 is grounded. Telco is indeed -48V. So I would expect hopefully to see pin 8 at close to 0 ohms. If so then the plus of the 48 V would connect here and the label is explicit. But what I have run into is that nothing connects to ground and as such whats minus is a guess. So at that point if you can take a cover off, look at the electrolytic caps that are sure to be across those 2 pins. Confirm the actual plus and minus. May be good to do this no matter what. I hate smoke. Regards Paul
On Wed, Nov 21, 2012 at 9:10 AM, Fabio Eboli <[email protected]> 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. > > ------------------------------**------------------------------**---- > This message was sent using IMP, the Internet Messaging Program. > > > > ______________________________**_________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/** > mailman/listinfo/time-nuts<https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts> > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
