Patent ID: 8581541

Claim:
A motor drive, comprising: an input for receiving input electrical power; an output for providing output electrical power to drive a motor load ( 20 ); at least one power converter stage operative to convert electrical power from a first form to a second form; and a signal conditioning system, comprising: an integer number m signal inputs individually receiving an input signal representative of a sensed operating condition of the motor drive, m being greater than 1, an integer number m channel circuits providing signal conditioning for a corresponding one of the plurality of signal inputs, the individual channel circuits including an integer number n parallel circuit branches extending between a first circuit node and a second circuit node, n being greater than 1, each circuit branch comprising: at least one impedance comprising a first impedance terminal coupled with the first circuit node and a second impedance terminal, and at least one fuse having a first fuse terminal coupled with the second impedance terminal, and a second fuse terminal coupled with the second circuit node, and an integer number n configuration inputs individually coupleable to a configuration signal source to receive a corresponding configuration input signal, and a blocking circuit coupled between the configuration inputs and the channel circuits to facilitate contemporaneous opening of fuses of a given circuit branch of each of the channel circuits using a single configuration input signal when the motor drive is not being operated, and to prevent electrical interaction between the channel circuits when the motor drive is being operated.