In message
<7b970d3d82cee74c920c2e6b0d3b837720bdc...@sn2prd0610mb358.namprd06.prod.o
utlook.com>, dated Fri, 16 Nov 2012, "Mcburney, Ian"
<[email protected]> writes:
If the total power consumption of the mixer was no more than 80W and
the +48V was current limited to no more than 1 Amp, would the mixer
require approval testing for north America or any other country as the
input voltage would only be 19V DC.
I think you would be taking a big risk that your solution would not
amuse the sceptical (or even skeptical) AHJs.
Obviously the external ac to dc laptop power supply would have all the
necessary approvals; probably to IEC60950 and be class 1 construction.
You should be looking to IEC 62368-1 for such future products. Also, the
PSU input can be Class 1 but the output of these PSUs is normally SELV,
which means that your mixer and all its cables and peripherals would not
have a 'safety earth' unless you provided it separately.
--
OOO - Own Opinions Only. See www.jmwa.demon.co.uk
The longer it takes to make a point, the more obtuse it proves to be.
John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK
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