For inductive loads, it is recommended to place a diode (known as freewheeling diode) anti-parallel with the
brake (i.e., Anode connected to the negative pole of the brake and cathode connected to the positive pole).
These will prevent inductive kicking (voltage rise when current through the inductor falls to zero).
Standard rectifier diodes such as or are appropriate for the application.1N4002 1N4934
Actually, there are other options to avoid inductive kicking. Instead of a diode, a varistor or a RC snubber
in parallel with the brake can also be used. This will improve transistor turn off time.
Next figure shows how to connect an inductive load to Pluto outputs (GPO1 can also be used).
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