Re: Phantom power on RS485 network
John B wrote:
It occurred to me that I might be able to feed phantom power
Rinnai uses s.t. like that with their "Infinity" hot water heaters.
We have three control units attached in a Y network to the same
2 junctions inside the box, using probably 20+metres of figure-8
cable. The data rate is low, but the LED displays in each panel
are powered by the lines, which seem to be non-polarised - I'm
guessing a bridge rectifier inside each panel. It'd be interesting
to scope it and see what they're really doing.
.
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