Curtis Controller model 1231C-8601, 96-144VDC, 500 Amps max, 0 to 5 k/ohm input

Peak Current Rating: 500A
2 Min Current Rating: 500A
5 Min Current Rating: 375A
1 Hour Current Rating: 225A
Voltage Drop @ 100A: .30
Under Volt Cutback: 64 Volt

Length: 12.2"
Base Width: 8.6"
Height: 3.2"


For on-road vehicles and other Higher Voltage, High Amp Applications. Infinitely variable throttle control, high pot input lockout, low voltage and high temperature current cutback. The "C" models use frequency shifting to reduce the operating frequency from 15kHz when the PWM output is less than ~15%. Frequency shifting improves the current limit control and also helps protect the controller when the motor is in near-stall conditions.

Features
• High frequency switching and ultra low voltage drop provides very high efficiency and quiet operation. Costs, heatsinking requirements and motor and battery losses are reduced. Low end torque, range and battery life are increased.
• Environmental protection provided by a sealed (factory serviceable), rugged, anodized
aluminum extrusion housing. Simple mounting and wiring with push-on type connectors for control signals. Plated solid copper buses used for all power connections.
• Thermal protection and compensation circuit provides under-temperature cutback, constant current limit over operating range, and linear rollback in over-temperature. No sudden loss of power under any thermal conditions.
• Frequency shifting from 15 kHz to 1.5 kHz at low throttle settings provides improved protection against stalled motors.
• Heavy duty power base in 1231C contains additional active devices to improve power handling capability.
• Potentiometer fault protection circuitry disables the controller if the throttle wires become open.
• High Pedal Disable prevents controller operation if the key switch is turned on while throttle is applied.
• Optional heatsink (p/n 16286) for model 1231C controller improves thermal capability.
• No adjustments are required.
• Simple installation — Uses a two wire throttle potentiometer.
SPECIFICATIONS
• Frequency of Operation: 15/1.5 kHz
• Standby Current: less than 30 mA
• Ambient Operating Temperature Range: -25°C to 50°C
• Controller Temperature Cutback Point: -25°C and +85°C