The state of the motor is closely related to the working current.

The digital ammeter with movable contact output can change the output state of relay according to the set current and drive the state indication according to the state of relay. For example, if 0. 1A is set to be greater than this value, lighting one lamp indicates motor rotation, while lighting another lamp below this value indicates motor stop.

In fact, the simplest way to detect the motor state is to use an ordinary ammeter.