Speed Controller SPD-SD450 Installation and Wiring

Rated Voltage   24 Volts
Rated For Motors   Up To 600 Watts
Maximum Current   35 Amps
Under Voltage Protection   20.5 Volts ±1.0 Volt
Recommended Fuse Size   40 Amps
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 Volt)

Power Connector
Red = Positive
Black = Negative

Mating Connector Item #CNX-2PX2


Required Connection  
Motor Connector
Blue = Positive
Yellow = Negative

Mating Connector Item #CNX-50
Required Connection  
Throttle Connector
Mating Connector Item # CNX-63
Required Connection  
Battery Display Connector

Optional Connection
Mating Connector Item # CNX-62
~Optional Connection
Brake Lever Connector

Optional Connection
Mating Connector Item # CNX-51

~Optional Connection

Charge Protector Connector

Optional Connection
Mating Connector Item # CNX-45

~Optional Connection

~Optional Connections do not need to be plugged into anything for the speed controller to operate.

*The Power Connector should be the last connection made.
*If installing this controller on a custom-built vehicle then a power switch and fuse or circuit breaker needs to be installed between the speed controller and battery pack.