Features: Input Voltage: 220V AC. Output Voltage: 180V DC. Working Principle: This electronic speed controller is designed for direct motor start-up and integrates with miniature gear reducers and speed sensors to form a mechatronic system. Direction Control: Forward or reverse motor rotation is achieved by connecting to M+ or M− terminals. Mechanical Performance: Offers reliable mechanical performance and wide speed adjustment range. Installation: Simple panel-mount installation using screws. Usage Instructions: 1. Before powering on, set the external speed control knob to zero to prevent inrush current and potential damage to the controller. 2. Terminal markings: AC terminals are for input power; M+/M− terminals supply power to the motor; P1 and P2 are emergency stop terminals — shorting P1 and P2 stops motor operation. 3. Built-in fuse provides overcurrent and short-circuit protection. Replace blown fuses only with identical specifications. Panel-mounted switches control motor start/stop only — they do not disconnect main power. Specifications: Item Type: Motor Speed Controller Material: ABS Input: 220V AC Output: 180V DC Dimensions (approx.): 100 × 60 × 114 mm (3.9 × 2.4 × 4.5 in) Panel Cutout Size (approx.): 81 × 53 mm (3.2 × 2.1 in) Mounting Method: Panel screw mounting Power Rating: 250W / 400W / 500W Package Includes: 1 × Motor Speed Controller Note: Slight measurement variations (±1–2 cm) may occur due to manual measurement. Color representation may vary slightly depending on monitor settings.