Speed Controller SPD-481000R Installation and Wiring

Rated Voltage   48 Volts
Rated For Motors   Up To 1000 Watts
Maximum Current   40 Amps
Rated For Chargers   Up To 3 Amps
Under Voltage Protection   42 Volts ± 1.0 Volt
Recommended Fuse or Circuit Breaker Size   50 Amps
 Dimensions (including mounting tabs)   4" Long x 2-5/8" Wide x 1-1/2" High
Labeled Connectors: The two identical connectors with black and red wires going to them are labeled for easy 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 lifespan of the battery pack. (The cutoff value is approximately 42 Volts ± 1.0 Volt)
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 & Red Connected = Medium

Black & Yellow 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.