CCM9N PWM DC Motor Speed Controller 10V-50V 30A PWM DC Controller

Features: 

CCM9N DC Motor Speed Controller provides variable speed capability for DC motor. 
Adjustable speed range is 5%-100%. 
Three PWM frequency can be choose: 240Hz, 2.2kHz, 22kHz; 
Suitable for the DC motor (or DC load) within 30A, Peak current 40A(max). 
The use of ambient environment temperature is -20?(-4?) to 40?(104?) 
Potentiometer with switch function. 

Operating instruction: 

Before you attempting to wire the controller, make sure power is off.
WARNING: DO NOT REVERSE POSTIVE AND NEGATIVE POWER LOADS.THIS WILL DAMAGE THE CONTROLLER.
TO CHANGE MOTOR DIRECTION, INTERCHANGE THE POSITIVE AND NEGATIVE WIRES OF MOTOR.
1. Connect wires refer to the “wiring diagram” (NO.7 picture). 
(It is recommended to add an appropriately rated fuse inline with the positive supply.) 
2. Select the appropriate frequency you need. 
3. Turn on the power. The LED lights, the power is OK. 
4. Adjust the potentiometer.