Michael P Dejewski, Age 671301 Shelly Ln, Hartland, WI 53029

5062101, Oct 29, 1991

Jul 21, 1989

7/384156

Michael P. Dejewski - Franklin WI

Johnson Service Company - Milwaukee WI

H04J 1400

359135

There is disclosed a data acquisition system for use, for example, in a facility management system, for receiving analog input information, converting the analog input information to multiple-bit digital data, synchronizing the multiple-bit digital data to a serial transfer clock, and restoring the digital data into a bit-parallel format for storage in memory and subsequent digital processing. The data acquisition system includes a plurality of inputs, each input being arranged to receive analog input information. An analog-to-digital converter converts the analog input information at each input to a multiple-bit data word wherein the bits of the data word are in bit-parallel format. A multiplexer couples each of the inputs to the analog-to-digital converter one at a time in succession and a parallel input-serial output register converts the parallel bits to a serial digital bit stream. An optical coupling circuit conveys the serial digital bit stream to a serial-input parallel-output latch by optically processing both the serial digital data stream and transfer enable clock pulses.