Speed Controller SPD-24250B Installation and Wiring

Rated Voltage  24 Volts
Rated For Motors  Up To 250 Watts
Maximum Current  20 Amps
Conversion Efficiency  95%
Under Voltage Protection  20.5 Volts
Recommended Fuse Size  20-25 Amps
Dimensions  3-7/8" L x 2-1/4" W x 15/16" H
Under Voltage Battery Protection: When the battery pack falls below a specific Voltage the controller turns the motor off preventing over discharging of the battery pack which extends the battery packs lifespan. (The cutoff value is approximately 20.5 Volts ± 1.0 Volts)

*Power Connector
Red = Positive
Black = Negative


Required Connection

Motor Connector
Blue = Positive
White = Negative
Required Connection
Throttle Connector

Mating Connector Item # CNX-52
Required Connection
Power Switch or Key Switch Connector

Mating Connector Item # CNX-51
Required Connection
Brake Lever Connector

Mating Connector Item # CNX-51
~Optional Connection
Speed Reducing Connector
Connecting black wires together reduces motor speed by 50%.

Mating Connector Item # CNX-551
~Optional Connection
*The power connector should be the last connection made.
*Fuse or circuit breaker protection is required between speed controller and battery pack.
~Optional Connections do not need to be hooked up for the speed controller to operate.