Speed Controller SPD-48500B Installation and Wiring

Rated Voltage   48 Volts
Rated For Motors   Up To 500 Watts
Maximum Current   20 Amps
Rated For Chargers   Up To 3 Amps
Conversion Efficiency   95%
Under Voltage Protection   42 Volts
Recommended Fuse Size   25 Amps
Dimensions (including mounting tabs)   4" Long x 2-5/8" Wide x 1-1/2" High
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 42 Volts ± 0.5 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
Blue = Positive
Yellow = Negative
Mating Connector
Item # CNX-50
Required Connection
Throttle Connector
Red = + 5 Volts Output
Black = Negative
Blue = 1-4 Volts Input
Mating Connector
Item # CNX-52		  
Required Connection

Key or Power Switch Connector
Blue & Red Disconnected = Power Off
Blue & Red Connected = Power On
Mating Connector
Item # CNX-51
Required Connection
Battery Charger Connector
Red = Positive
Black = Negative
Mating Connector
Item # CNX-51		  
~Optional Connection
Brake Lever Switch Connector
Black & Yellow Connected = Motor Off
Black & Yellow Connected = Brake Light On
Mating Connector
Item # CNX-51
~Optional Connection 
Brake Light Connector
Goes To 36 Volt Brake Light
Red = Positive
Black = Negative
Mating Connector
Item # CNX-51
~Optional Connection
Power Light Connector
Goes To 36 Volt Power On Indicator Light
Red = Positive
Black = Negative
Mating Connector
Item # CNX-51
~Optional Connection
*The power connector should be the last connection made.
*Fuse or circuit breaker protection is required between speed controller and battery pack.
~Optional Connections do not need to be hooked up for the speed controller to operate.