Stepper drivers are very important for the normal operation of stepper motors and brushless DC motors, so in order to make the motor work better, we need to understand the stepper driver. Today, let us first take a look at the signal output ports ALM and BRK of the driver.

Please note that if you only control stepper motor operation, then you do not need to connect ALM and BRK. Because they are only used to output signals and are not used to control the motor. Here are some descriptions of these two ports:

1.ALM
ALM is the alarm signal output port. When using it, it needs to be connected to the signal receiving end of the driver. There are two wiring methods for the ALM port, as shown below:

When the driver sends an alarm, the internal switch between ALM+ and ALM- is closed and an alarm signal is output to the controller.
2.BRK
BRK is the brake signal output port. When using it, you need to connect the relay and the brake of the motor. The wiring method is as follows:

When the driver outputs the braking signal, the relay is disconnected, the motor is braked and stops running.
Compared with a separately powered motor brake, using the drive's BRK port to control the brake for braking results in faster response.