Intelligent brushless dc motor controller

Key Features

• Curtis Model: 1253-4804
• Norminal Battery Voltage (Volts): 48V
• Amature Current Limit (amps): 600
• Programmable Undervoltage Cutback (Volts): 32-42
• Overvoltage Cutoff (Volts): 60
• PWM operating frequency: 15.6 kHz
• Electrical isolation to heatsink (min.): 500 VAC
• KSI input voltage: 28–60V DC
• KSI input current (no contactors engaged):
  • 60 mA without programmer
  • 130 mA with programmer
• Logic input current: < 1 mA
• Status LED output current (max.): < 2 mA
• Heatsink overtemperature cutback: linear cutback starts at 80°C; complete cutoff at 120°C
• Heatsink undertemperature cutback: 50% current below -25°C
• Operating ambient temperature range: -40°C to 50°C
• Storage ambient temperature range: -40°C to 85°C
• Package environmental rating: IP54
• Throttle Type: 0-5KΩ (default setting), 5K-0Ω, 0-5V or single-ended 3-wire potentiometer (1kΩ to 10kΩ range)
• Dimensions: L196xW146xH77 mm
• Net Weight: 2.6 kg

Features include:

• Smooth and Quiet Control
  • Programmable acceleration rates provide smooth application of pump motor torque.
  • 15.6 kHz PWM frequency for near-silent operation.
• Programmable Flexibility
• Easily programmable through a Curtis programming device.
• Four Speed Select inputs (SS1.SS4) with individually programmable top speeds.
• Programmable throttle input for precise speed control with a variety of signal sources.
• Programmable turn-off delay allows SS4 to be used for power steering.
• Adjustable minimum speed setting to ensure pump lubrication and to maintain steering system pressure.
• Robust Safety and Reliability
• Interlock feature disables the controller when operator is not present.
• Programmable startup lockout prevents inadvertent operation.
• Seamless integration with Curtis gauges (models 803, 841, 906, and enGage. IV) for lift lockout function.
• Lift lockout disables the controller at low battery state of charge.
• Redundant watchdog timer circuits ensure proper software operation.
• External Status LED output for easy troubleshooting.
• Short-circuit protection on main contactor driver.
• Precharge control prevents pitting of contactor tips at startup.
• Thermal cutback provides protection to the controller.
• Rugged housing meets IP54 environmental ratings.