High-frequency switching and ultra-low voltage drops provide high efficiency and silent operation. Simple mounting and wiring with push-on connectors for control signals and plated solid copper buses for power connections. Compatible with either a two-wire potentiometer or a voltage throttle. Throttle fault protection circuitry disables controller if throttle wires become open. High pedal disable feature prevents controller operation if key is turned on while throttle is applied. Plug braking diode internal to controller. Thermal protection and compensation circuit provides constant current limit over operating range and during under/over temperature cutback; no sudden loss of power under any thermal conditions. Undervoltage cutback function protects against low battery voltage, including low voltage caused by external loads. Easily programmable through the Curtis Model 1313-4431 Handhold Programmer or 1314-4402 PC Programming Station. Rugged anodized aluminum extruded housing meets IP65 environmental sealing standards for use in harsh environments. SPECIFICATIONS: 1205M-6B403 CONTROLLERS Nominal input voltage: 60/72 V (1205M-6B403 has two available battery voltage settings. The voltage can be set to either 60 volts or 72 volts.) PWM operating frequency: 15.6 kHz Electrical isolation to heatsink (min.): 500 V KSI input current (no contactors engaged): Less than 70 mA without programmer; Less than 130 mA with programmer Logic input current: Less than 2 mA Status LED output current (max.): 2 mA Throttle type: 2-wire 0 - 5kohm, 2-wire 5kohm - 0, or 0 - 5V Storage ambient temperature range: -40Celsius to 85Celsius (-40Fahrenheit to 185Fahrenheit) Operating ambient temp. range: -40Celsius to 50Celsius (-40Fahrenheit to 122Fahrenheit) Package environmental rating: ISTA