6. Electrical system
6.1 CPD10/15/20/25/30J fork
6.1.1summarize
Curtis PMC 1244 MultiMode controllers are separately excited motor speed controllers designed
for use in a variety of material handling vehicles. These programmable controllers are simple to install,
efficient, and cost effective.
Typical applications include low lifts, stackers, fork lifts, reach trucks, personnel carriers,
counterbalance trucks, order pickers, boom trucks, and other industrial vehicles.
The 1244 MultiMode controller offers smooth, silent, cost effective control of motor speed and
torque. A four quadrant, full-bridge field
Winding control stage is combined with a two quadrants, half-bridge armature power stage to provide
solid state motor reversing and regenerative braking power without additional relays or contactors. The
1244 controller can also be specified to be compatible with CAN Bus communication systems.
These controllers are fully programmable by means of the optional handheld 1307 programmer.
Use of the programmer provides diagnostic and test capability as well as configuration flexibility.
Like all Curtis PMC 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 1307 handheld programmer
_ Complete diagnostics through the 1307 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
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