| Pin | Function | Wire Color (Typical) | Notes | | --- | --- | --- | --- | | 1 | Battery Voltage (Keyswitch) | Red | Turns controller on (+24/36V) | | 2 | Throttle Wiper (Input) | White | 0-5V or 5k ohm pot | | 3 | Throttle Low | Black/Grey | Ground reference for throttle | | 4 | Throttle High (5V Out) | Orange | Supplies 5V to pot throttle | | 5 | Main Contactor Coil (+) | Blue | Engages main solenoid | | 6 | Reverse Beeper | Yellow | Activates when reverse selected | | 7 | Brake Relay | Brown | Engages parking brake release | | 8 | Reverse Speed Switch | Green | Halves max speed | | 9/10 | Inhibit / OBC | Purple | For chargers or external interlocks |
Capable of high peak currents (often up to 400–600 Amps) for demanding torque requirements.
Supports 5kΩ 3-wire potentiometers, 0–5V throttles, and electronic throttles. 2. Pinout Configuration and Wiring Diagrams
The Curtis 1520 is a heavy-duty, programmable motor speed controller designed for electric vehicles. It manages power delivery to DC series motors efficiently and safely. This guide serves as a comprehensive manual for installation, wiring, programming, and troubleshooting the Curtis 1520 controller. 1. Specifications and Key Features curtis 1520 controller manual
Disconnect batteries and clean the controller casing with a dry cloth to prevent electrical tracking.
| Blink Code | Fault Name | Likely Cause | |------------|---------------------------|-------------------------------------------| | 1-2 | Battery Under-voltage | Low pack voltage or bad connection | | 2-3 | Throttle Fault | Broken wire or out-of-range (0-5V) signal | | 3-4 | Main Contactor Welded | Contactor stuck closed | | 4-1 | Motor Temperature Sensor | Thermistor open or shorted | | 5-3 | Encoder Signal Loss | Broken encoder wiring or bad motor sensor | | 6-2 | Over-temperature (Controller)| Heat sink or fan failure |
Curtis Instruments protects its intellectual property. You generally cannot Google "Curtis 1520 manual PDF" and find an official, free download. Here are the legitimate channels: | Pin | Function | Wire Color (Typical)
Compatible with multiple types, including 5kΩ 3-wire potentiometers, 0-5V signals, and MCOR (Motor Control Output Regulator).
Supports 5kΩ 3-wire, 0–5V, and ITS (Inductive Throttle Sensor) inputs.
Cycle the keyswitch off and on to save parameters before road testing. Diagnostics and Fault Codes Pinout Configuration and Wiring Diagrams The Curtis 1520
If your vehicle isn't moving, check these common failure points:
Torque the high-current M6 terminal bolts to 11 N·m (98 in-lbs) to avoid loose connections. 4. Programming and Tuning Parameters
Configure for ITS, 0-5kΩ, or 5kΩ-3-wire, depending on the golf cart type. 4. Troubleshooting and Diagnostic Codes Curtis 1520