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What does Master-Slave wiring mean and when would I use it?

Master-Slave wiring means that the feedback signal of the master actuator is fed as the input signal of its slave actuator. This wiring method is widely used for the application where two or more actuators are mechanically coupled to a single shaft or linkage.

When the Master actuator throttles in response to its control signal, its feedback signal is used as the control signal for the Slave actuator to assure the Slave moves together with the Master.

If the Master actuator fails, the Slave will not move.

If the Slave actuator fails, the Master’s stall routine will be executed since the control system is monitoring the position feedback signal of the Slave actuator.