Curtis 1244 User Manual page 8

1 — OVERVIEW
2
Like all Curtis motor controllers, the 1244 offers superior operator control of
the vehicle's motor drive speed. Features include:
✓ Full-bridge field and half-bridge armature power MOSFET design,
providing
• infinitely variable forward, reverse, drive, and brake control
• silent high frequency operation
• high efficiency
✓ Regenerative braking, providing longer operation on a single battery charge
and reducing motor brush wear and motor heating
✓ Programmability through the 1313 handheld programmer and 1314 PC
Programming Station
✓ Complete diagnostics through the programmer and the internal Status LED
✓ Two fault outputs provide diagnostics to remotely mounted displays
✓ Continuous armature current control, reducing arcing and brush wear
✓ Automatic braking when throttle is reduced from either direction; this
provides a compression braking feel and enhances safety by automatically
initiating braking in an operator hands off condition
✓ Deceleration Rate, Load Compensation, and Restraint features prevent
downhill runaway conditions; speed is controlled to within approximately
20% of level surface value
✓ MultiMode™ allows four user-selectable vehicle operating personalities
✓ Programmable to match individual separately excited motor characteristics
✓ Meets or exceeds EEC fault detect requirements
✓ Vehicle top speed is controlled and limited in each mode
✓ Linear temperature and undervoltage cutback on motor currents; no sudden
loss of power under any thermal conditions
✓ High pedal disable (HPD) and static return to off (SRO) interlocks prevent
vehicle runaway at startup
✓ Creep speed adjustable from 0% to 25% in each mode
✓ Continuous diagnostics during operation, with microprocessor power-on
self-test
✓ Internal and external watchdog circuits ensure proper software operation
✓ Programmable coil drivers provide adjustable contactor pull-in and holding
voltages
✓ Hour-meter enable output is active whenever the controller is providing
motor current
✓ Optional Electromagnetic Brake Driver provides automatic control of an
electromagnetic brake or other similar function
✓ Optional Reverse Signal Driver provides a low signal any time the vehicle
is driving or braking in reverse
Curtis 1244 Manual,
Rev. E