Features The input voltage of the control signal of the driver controller is generally 3.3V-24V, which has 32 kinds of subdivision precision to choose from, making it meet the needs The input signal of the stepper motor drive module driven by the H-bridge bipolar constant current is isolated by high-speed optocoupler. Built-in temperature protection and overcurrent protection, the cnc drive module has good protection performance to achieve the purpose of extending the service life. This tb6600 driver controller module has good performance, low noise, easy to carry and store Customer Service. If there are any questions before or after purchasing, please do not hesitate to contact us Specification: Item Type: Driver Controller  Power Supply Voltage: DC 9-42V power supply (12-24V recommended) Current: The output peak current can get 4.0A (suitable for 57, 42 stepper motors of 1.8NM and below) Cooling Method: Natural cooling or forced air cooling. Use Occasion: (1) Do not place it near to other heat-generating equipment, avoid dust, oil, corrosive gas. (2) Combustible gas and conductive dust are prohibited. MOisture: 40-90%RH Vibration: 10-55Hz/0.15mm Storage Temperature: -20-65℃ Package List:1 x Driver Controller  Note:Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering. Package List 1 x Driver Controller