[GreenKeys] Who made this RS-232 / Current Loop converter? Any docs??

[Chris Elmquist]

On Monday (12/01/2014 at 08:27PM -0600), drlegendre . wrote:
> Any idea who made this, or where I can find a document? Some quick pics are
> at:
> 
> https://nerp.net/~legendre/greenkeys/rs232_cl_converter_01.jpg
> https://nerp.net/~legendre/greenkeys/rs232_cl_converter_02.jpg
> 
> The only logo on the case looks like "ED&M" which might also be :"EDeM"..
> Other sources indicate that it was made by "Camiacs" - and the circuit
> board is marked:
> 
> "RS232 / CL MODEL 5"
> "CAM 25-116A"
> 
> So perhaps 'CAM' = Camiacs? It has several series of internal jumpers on
> the board, so it looks like it can be configured in multiple ways.

I concur with that analysis.  If you feed Google, "RS232 / CL MODEL 5",
you get lots of links to Camiacs RS232/CL converters, including this one,

http://www.ebay.it/itm/Camiacs-RS232-CL-Convereter-Model-V-/180909962801

which has their logo in place of the ED&M on yours.

> Oh, and FWIW - on the RS-232 side, pins 2,3,5,6,7,8 are in use. The CL side
> has pins 1,2,3,4 in use.
> 
> Thanks for any help! I have two of these now, and it would be nice if I
> didn't have to reverse-engineer them to put them to use..

I didn't find any hints of online documentation.  I'm betting it will
be faster to reverse it and make your own schematic.  It shouldn't be
a very complicated circuit.

Are the AC outlets in parallel with the AC input or are they somehow
controlled by the circuit (ie, some kind of auto-power off when line is
idle or code controlled maybe?)

-- 
Chris Elmquist NØJCF