Features: This Dc motor governor is suitable for small power permanent magnet dc motor adjustment It has the advantages of wide speed range, stable operation, good mechanical performance and strong action. Widely used in packaging and printing, instrumentation, clothing machinery, medical machinery and other industries. This product uses built-in safety tube for over current or short circuit protection, safe to use This motor speed controller is easy to install and operate. Specification: Power supply: AC220V 50/60hz Control mode: CW Output voltage: 0-90vdc / 0-110vdc / 0-180vdc / 0-200vdc / 0-220vdc (optional) Scope of application: suitable for dc motor with rated current of 2.2A Working environment: - 10 ~ + 50 ℃ Relative humidity: ≤90% Outline size: 100 * 60 * 112mm / 3.9 * 2.4 * 4.4in Opening hole size: 82x54mm 90-2x dia. 4.5mm Installation:panel screws Weight: 178 g / 6.3 oz(approx.) Package list: 1 x Motor Speed Controller Instructions: 1. Please adjust the external speed knob to "0" before use to avoid large instantaneous current and damage to the controller. 2. The wiring terminal "AC" at the back represents the AC input voltage AC220V, "M+" and "M-" represent the dc power supply output connected to the dc motor, and "P1" and "P2" are the emergency stop ends. When P1 and P2 are short connected, the motor will stop running. 3. The product USES built-in fuse for over-current or short-circuit protection. If fuse is broken, fuse of the same specification should be replaced. The panel action switch only controls the motor action or stop, and does not interrupt the power supply. Please turn off the power supply if it is not used for a long time. 1、This Dc motor governor is suitable for small power permanent magnet dc motor adjustment 2、It has the advantages of wide speed range, stable operation, good mechanical performance and strong action. 3、Widely used in packaging and printing, instrumentation, clothing machinery, medical machinery and other industries. 4、This product uses built-in safety tube for over current or short circuit protection, safe to use 5、This motor speed controller is easy to install and operate.