Hey gents, I tried the greenkeys list, but to no avail. So let's see who knows what around here... I recently acquired a pair of these RS-232 -to- CL converters. They are branded "ED&M" or possibly "EDeM" - but they seem to have been made by an outfit called Camiacs. They are marked Model V or Model 5. The circuit boards are marked "CAM 25-116A" in one corner. Photos can be seen here: https://nerp.net/~legendre/greenkeys/rs232_cl_converter_01.jpg https://nerp.net/~legendre/greenkeys/rs232_cl_converter_02.jpg Does anyone have documents for these units? They have several sets of internal jumpers, to configure various RS-232 parameters as well as passive / active states for the current loop side - Rx+ / Rx- Tx+ / Tx- etc. Any ideas? Any documents? Thanks in advance!