• Programmable Series Motor Controllers
• Models 1204M / 1205M / 1221M

• 36-48Volt
• 275 A

Curtis Models 1204M/1205M/1221M provide fully programmable control of DC series motors performing on-vehicle

traction or pump duties. These microprocessor-based MOSFET controllers add flexibility and versatility to the time-

proven Curtis series motor controller family.

Primarily designed for battery-powered vehicle applications using either electric or hydrostatic traction. These

include industrial trucks, personnel carriers, mobile elevating work platforms, and golf and utility vehicles.

FEATURES

Controllable Power

Pulse Width Modulation (PWM) control with

programmable speed, acceleration rate, and current limit.

Short duration boost capability (5 sec, 110% of

2 min current rating). Allows clearing of obstacles,

climbing ramps.

High efficiency, silent operation. Costs, heat-sinking

requirements, motor and battery losses reduced.

Low-end torque, range, and battery life maximized.

Programmable and Flexible

Fully programmable via the Curtis Model 1313 Handheld

Programmer or the Curtis 1314 PC Programming Station.

Supports multiple throttle types and high pedal

disable (HPD) options.

LED output for easy system troubleshooting via

flash codes.

Fully programmable analog throttle input for precise

speed control with a variety of signal sources.

Programmable under voltage cutback caters for different

battery types.

Programmable, variable, or fixed plug braking modes.

Plug braking diode internal to controller.

Models available without A2 busbar for applications such

as pump control that do not require plug braking.

1204M 1221M

Robust Safety and Reliability

Redundant hardware and software watchdog timers.

MOSFET short-circuit protection functions.

Programmable High Pedal Disable function prevents

controller operation if throttle is applied before key is

turned on.

Contactor fault detection: controller shuts down safely

if the main contactor opens.

Contactor protection functions minimize high current

arcing to prevent contact pitting and thus prevent

contactor weld failures.

PWM frequency shifts from 15.6kHz to 1kHz in high

temperature of controller, providing audible warning of

thermal cutback.

Under voltage cutback and shutdown functions protect

against low battery voltage, including low voltage caused

by external loads.

Electrical isolation to heat sink: 500VAC(48V);

1000VAC (›48V).

Compliance

EMC: Designed to the requirements of EN12895.

Package environmental rating: IP54.

Certified to UL 583.

Regulatory compliance of the complete vehicle system

with the controller installed is the responsibility of the

vehicle OEM.