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

[drlegendre .]

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.

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..

Thanks much!

-ML
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