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Curtis 1228 Manual, Rev. F
1 — OVERVIEW
✓ Available for single-ended or wigwag 5kΩ potentiometer throttles and
5V throttles (both standard full stroke and restricted range)
✓ MultiMode™ input selects between two different operating modes,
thus allowing optimization of vehicle characteristics for different driv
-
ing conditions (for example, indoor/outdoor)
✓ Speed limit input provides linear variable speed limiting when an exter-
nal speed limit pot is used
✓ Current limiting in both driving and regenerative braking modes
✓ Load compensation stabilizes speed on ramps and over obstacles
✓ Speed scaler eliminates variations in maximum speed that would other-
wise result from variations in battery charge levels
✓ High pedal disable (HPD) function with lockout monitors status of
the throttle during turn-on and prevents operation until the throttle
has been returned to neutral
✓ Key-off deceleration function provides a controlled deceleration if the
keyswitch is turned off while driving
✓ “E Stop” provides a faster deceleration for emergency stops
✓ Seat lift function simplifies the wiring required to implement seat lift
in DME scooter applications
✓ Comprehensive fault detection monitors main contactor, output stage,
throttle demand vs. output, etc., and disables the drive functions if any
conditions are outside specified limits
✓ ISO 7176 compliant throttle fault detection circuitry inhibits driving if
throttle pot signal goes out of range for any reason
✓ Missing/shorted brake detection forces neutral in the event of an open
or shorted brake circuit
✓ Anti-rollback/anti-roll-forward function sets brake delay according to
speed and direction for improved braking response and minimized roll
-
back on hills, etc.
✓ Reverse beeper option can be used to drive a low current dc horn when
vehicle is in reverse
✓ “Push” input electrically releases brake for key-on pushing (requires
that the vehicle be stopped first)
✓ “Push-Too-Fast” feature guards against unpowered vehicle runaway by
powering up and regulating motor voltage to limit vehicle speed
✓ Inhibit input disables the controller and puts the vehicle in a safe state
during charging, etc.
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