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
Battery Charger Connector

Mating Connector Item # CNX-51


~Optional 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-62
~Optional Connection
**PAS Sensor Connector

Mating Connector Item # CNX-63

~Optional Connection
*The power connector should be the last connection made.
*Power switch and fuse or circuit breaker protection is required to be installed between the speed controller and power source (battery pack).

**PAS sensor connector is for use with electric bicycles that have pedal assist sensors. This is not a required connection and does not need to be connected to a PAS sensor for the controller to operate.
~Optional Connections do not need to be hooked up for the speed controller to operate.