Curtis PMC 1209B/1221B/1221C/1231C Manual
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OVERVIEW
OVERVIEW
Curtis PMC Model 1209B/1221B and 1221C/1231C electronic motor speed
controllers are designed to provide smooth, silent, cost-effective control of motor
speed and torque on a wide variety of electric vehicles. The 1209B/1221B
controllers are designed primarily for material handling applications, and the
1221C/1231C controllers for on-road vehicles.
Like all Curtis PMC 1200 series controllers, the 1209B/1221B/1221C/1231C
models offer superior operator control of the vehicle’s motor drive speed. Key
features of these controllers include:
✓ Infinitely variable drive and brake control
✓ Power MOSFET design provides high efficiency (for reduced motor and
battery losses) and silent operation
✓ High pedal disable (HPD) function monitors throttle status during turn-on
and prevents operation until throttle has been returned to neutral [optional
feature]
✓ Thermal protection and compensation circuit provides both
under-
temperature and overtemperature cutback, as well as steady current limit
throughout the entire operating range
More Features
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Fig. 1 Curtis PMC
1209B full-feature
electronic motor
controller.
Models 1221B, 1221C,
and 1231C have
similar external
connections.
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