Speed Controller SPD-SD400 Installation and Wiring

Rated Voltage   24 Volts
Rated For Motors   Up To 400 Watts
Maximum Current   30 Amps
Conversion Efficiency   95%
Under Voltage Protection   21 Volts
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 21.0 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-2PX2


Required Connection  

Motor Connector
Blue = Positive
Green = Negative

Mating Connector Item # CNX-50


Required Connection  
Throttle Connector

Mating Connector Item # CNX-65
Mating Throttle Item # THR-500


Required Connection
Brake Lever Switch Connector

Mating Connector Item # CNX-51


~Optional Connection
Charger Inhibit Connector

Connects to positive lead of battery charger port and disables motor when the battery pack is being recharged.

Mating Connector Item # CNX-45


~Optional Connection
*The power connector should be the last connection made.
*A power switch and fuse or circuit breaker protection needs to be installed between the speed controller and battery pack.
~Optional Connections do not need to be hooked up for the speed controller to operate.