> seriously, I have to ask if 48V is "safe" in Italy.
> And, moreover, that can't definitely work with my current LDOs in place.
> =

> =


According to EN 61010 - Safety requirements for electrical equipment for =

measurement, control and laboratory use, the permissible limits for accessi=
ble =

parts are 33V rms and 46.7V peak or 70VDC. For equipment rated for wet =

locations the voltage levels are 16Vrms and 22.6V peak or 35VDC.

And here is a question about that: Say I have a pulsed DC between 0V and +5=
0V, =

1 second on and 1 second off where 0V is tied to earth. Is that still DC or=
 do =

I get outside the limits for 46.7V peak. Or does it count as an AC centered =

around +25V (from earth) with an rms of 25V? Would it make a difference if =
it =

is isolated from earth or not?

/Ruben
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D
Ruben J=F6nsson
AB Liros Electronic
Box 9124, 200 39 Malm=F6, Sweden
TEL INT +46 40142078
FAX INT +46 40947388
ruben@pp.sbbs.se
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D
-- =

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