Applies to passive, two-wire, externally powered pulse output devices to be used in electricity meters as defined by the relevant standards of technical committee 13 as well as future standards for static VA-hour meters. Such pulse output devices are used to transmit pulses to a receiver (e.g. a tariff device).<br />
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This publication is of high relevance for Smart Grid.

Electricity metering equipment (a.c.) - Particular requirements - Part 31: Pulse output devices for electromechanical and electronic meters (two wires only)

IEC 62053-31:1998

Electricity metering equipment (a.c.) - Particular requirements - Part 31: Pulse output devices for electromechanical and electronic meters (two wires only)