Curtis 3501 Manual -

IP65/IP67 front panel protection against dust and water ingress.

Receives 24V/36V/48V positive logic to wake up and power the internal logic boards of the controller.

The 10-segment LED bar graph displays the remaining usable energy stored in your battery pack.

Varies by specific sub-model (ranging from 200A to 400A peak current). curtis 3501 manual

The unit must be replaced, as moisture will eventually corrode the internal printed circuit board (PCB). Clean only with a damp, soft cloth without harsh chemical solvents.

Default factory passcodes are often 1221 or 3501 . For advanced retrieval, the Curtis 1313 handheld programmer or 1314 PC software can be used.

Typically available in 24V, 36V, or 48V configurations. IP65/IP67 front panel protection against dust and water

The unit is engineered for durability in harsh environments. Full technical details can be found in the Digital Instrumentation Model 3501 Datasheet provided by Curtis Instruments.

The Ultimate Guide to the Curtis 3501 Controller: Manual, Troubleshooting, and Setup

Connects to the potentiometer or inductive sensor. Ensure the manual-specified throttle type matches your vehicle configuration (programmed via a Curtis handheld programmer if adjustable). Varies by specific sub-model (ranging from 200A to

Use a heavy-duty resistor (e.g., 100 ohms, 5-10 watts) across the controller's B+ and B- terminals to safely drain stored energy.

The manual clearly states: “Internal components are not field-serviceable. Disassembly voids the IP seal and any warranty.” In practice, the hourly cost of troubleshooting a failing 3501 usually exceeds the cost of a new unit ($80–$150 street price).