functional unit for emitting, transmitting, retransmitting or receiving pulses, representing finite quantities, such as energy units, funktsionaalne element suurusi, nt energiaühikut, esitavate impulsside väljastamiseks, edastamiseks, ümbersuunamiseks või vastuvõtuks, functional unit for emitting, transmitting, retransmitting or receiving pulses, representing finite quantities, such as energy normally transmitted from some form of electricity meter to a receiver unit