Altop industries offers isolators, converters, and signal conditioners, series: adt7000. Features: accept dc input from thermocouples, rtds [pt 1000] [4-20] ma, [0-5], [0-10] v, frequency [0-10 khz], etc,; accept ac inputs [0-1] a, [0-5] a, [0 1 10] v, [0-230] v, etc; gives optically/galvanically isolated outputs in form of , [4-20] ma, [0-20] ma, [0-5] v [0-10]v frequency, etc.; din rail mounting, abs enclosure; can be calibrated onsite through zero/span presets; 230 v ac/110 v ac operated or 24 v dc operated [for converters]; and up to maximum 4 parallel independent outputs can be provided for single input.