Scope of application: less than 750W DC permanent magnet, excitation motor motor universal input voltage: AC 110V-220V 50/60Hz output power: peak 750W when AC 220V input; peak 300W when AC 110V input excitation voltage: when AC220V input, excitation terminal L+ L- is DC 205VDC When the AC 110V is input, the excitation terminal L+ L- is DC 95VDC. armature voltage: When AC220V input, the armature end M+M- is arbitrarily adjustable from 0-220VDC When AC110V is input, the armature terminal M+M- is arbitrarily adjustable for DC 0-110VDC. potentiometer matching value: 4.7Kohm 2W the terminal is marked as K: character K two terminals, is the start and stop switch, no need to try direct wire connection the wiring is used: 1, permanent magnet DC motor motor (motor lead wire is 2 lines): Controller, M+M- is connected to the motor; at this time, L+L- is empty, remember not to connect any other line. 2, excitation DC motor motor (motor lead wire is 4 wires): Controller, M+M- is connected to the motor armature; L+ L- is connected to the motor excitation. Note that the two are not reversed. Colour:green Material:plastic Size:100 x 75mm Package Contents: 2 x drive module(Some accessories:random colors, don't accept the specified color)