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Abstract

A module for interfacing a variety of metering pulse generators converts an analog pulse from a generator into a digital pulse which can be counted by automatic meter reading equipment. A charging circuit is connected across the inputs to receive, and be charged by, an input waveform from the metering pulse generator. A solid state switch responds to accumulated charge in the charging circuit to switch from an 'off' state to an 'on' state. A logic pulse generator is connected between the solid state switch and the outputs, for physical and electrical isolation of the metering pulse generator from the pulse counter. The logic pulse generator responds to the 'on' state of the solid state switch to generate a logic pulse to the pulse counter.

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First Claim