Specification: Item Type: Motor Speed Controller Voltage: DC 12-50V Current: Maximum 20A, recommended no more than 15A Size: 7.6 x 5 x 5cm / 3 x 2 x 2in(including heat sink) Packing List: 1 * Motor PWM Speed Controller Wiring Method: 1)GND: 12-50 VDC power supply negative 2)12-50 V: 12-50 VDC power supply positive 3)M+, M- are connected to two wires of DC motor, no need to distinguish  positive or negative. 4)PWM+: Positive terminal for external PWM signal and for MACH3 control cards,  negative terminal of PWM for PLC 5)PWM-: Negative terminal for external PWM signal and for MACH3 control cards,  negative terminal of PWM for PLC 6) NPN-E: Alarm NPN output transmitter pole. Connected to the GND for MACH3 cards. 7) NPN-C: Alarm NPN output collector pole. Connected to the P10 input terminal for MACH3 cards. 8) OC-ADJ-T: Over-current setting potentiometer. A letter corresponds to 2A, the maximum can be set as 20A.
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