The board with the TB6560 is a motor controller. It works by providing a digital pulse of work and direction. We can use the board to control a step motor like the NEMA 17 

Tb6560 CNC Router 1 Axis Controller Motor Stepper Driver 3A :

• Minimum operating voltage: 10 V

• Maximum operating voltage: 35 V (24V recommended)

• Maximum current: ± 3 A

• Stepper motor · two phases · four phases

• Microstep resolution: full, 1/2, 1/8, and 1/16

• PCB measurements: 75x50 mm

• CNC Router 1 Axis Controller Stepper Motor Drivers TB6560 3A driver board

• Dc operating voltage 10V-35V. Recommended for using a switching power supply DC24V power supply

• 6N137 high-speed optical coupling ensures high speed without losing steps

• Using the TB6560AHQ chip with low voltage shutdown, overheating stop and overcurrent

• Protection circuit to ensure optimal performance

• Nominal maximum output: 3 A, peak 3.5A

• For two phases within 42.57 staggering 3A / four phases / line four / six wire stepper motor, and not suitable for more than 3A stepper motor

• Half-stream automatic function

• Subdivision: full step, half step, step 1/8, 1/16 step, a maximum of 16 subdivisions