Speed Controller SPD-24500R Installation and Wiring

Rated Voltage   24 Volts
Rated For Motors   Up To 500 Watts
Maximum Current   30 Amps
Rated For Chargers   Up To 3 Amps
Conversion Efficiency   95%
Under Voltage Protection   20.5 Volts
Recommended Fuse Size   40 Amps
 Dimensions (including mounting tabs)   4" Long x 2-5/8" Wide x 1-1/2" High
Labeled Connectors: The three identical connectors with black and red wires going to them are labeled on their bottom sides for easy identifications. The rest of the connectors have unique wire colors so they do not need to be labeled for identification.

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)
Motor Cut-Off During Braking: When the brakes are engaged the brake switch signals the controller to turn off the motor.
*Power Connector
Red = Positive
Black = Negative

Mating Connector Item # CNX-50


Required Connection  

Motor Connector

Yellow= Positive
Blue = Negative

Mating Connector Item # CNX-50
Required Connection  
Throttle Connector
Red = + 5 Volts Output
Black = Negative
Green = + 1-4 Volts Input

Mating Connector Item # CNX-52
Required Connection  
Key or Power Switch
Blue & Blue Disconnected = Power Off
Blue & Blue Connected = Power On
Mating Connector Item # CNX-51
Required Connection  
Speed Selection Switch

All Wires Disconnected = High

Black & Yellow Connected = Medium

Black & Red Connected = Low
Mating Connector Item # CNX-52

~Optional Connection
Reverse Switch Connector
Black & Yellow Connected = Motor Reverse
Mating Connector Item # CNX-51
~Optional Connection
Charger Port Connector
Black = Negative
Red = Positive


Mating Connector Item # CNX-51
~Optional Connection
Brake Switch Connector
Green & Black Connected = Motor Off and Brake Light On
Mating Connector Item # CNX-51
~Optional Connection
Brake Light Connector
Red = + 24V Positive
Green = Negative


Mating Connector Item # CNX-51
~Optional Connection
Power Indicator Connector
Black = Negative
Red = + 24V Positive


Mating Connector Item # CNX-51
~Optional Connection
*The power connector should be the last connection made.
*Fuse or circuit breaker protection should be installed between speed controller and battery pack.
~Optional Connections do not need to be hooked up for the speed controller to operate.