DEVICE FOR ENTERING DIGITAL LOGICAL SIGNALS Russian patent published in 2000 - IPC

FIELD: computer engineering, in particular, control of production equipment. SUBSTANCE: device has galvanic isolation units, which are designed using transistor optical isolation pairs, microprocessor and interface unit. Goal of invention is achieved by design of data input of microprocessor as connection of same name collectors of transistors of each group of optical isolation pairs to one another. Emitters of each group are also joined and connected through interface unit to outputs of microprocessor, thus providing control inputs of galvanic isolation unit. EFFECT: simplified design, decreased cost and size, increased reliability. 2 dwg