Description

OVERVIEW
Curtis 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.

Typicalapplications 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 effectivecontrol of motor speed and torque. A four quadrant, full-bridge field winding control stage is combined with a two quadrant, 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 programmer or PC programming station. Use of the programmer provides
diagnostic and test capability as well as configuration flexibility.
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 3 ✓ Optional Auxiliary Driver provides a low signal to power an auxiliary
contactor or other similar function

✓ Driver outputs are short circuit protected and provide built-in coil spike
protection

✓ Controller is programmable to provide throttle control of motor speed,
applied motor voltage, or motor torque

✓ Can be configured for CAN Bus compatibility.
Familiarity with your Curtis controller will help you install and operate it
properly. We encourage you to read this manual carefully. If you have questions,
please contact the Curtis office nearest you.

INSTALLATION AND wiring 

Low Current Connections

Three low current connectors are built into the 1244 controller. They are located
in a row on the top of the controller:

The 24-pin connector provides the logic control connections. The mating
connector is a 24-pin Molex Mini-Fit Jr. connector part number 39-01-2245
using type 5556 terminals.

Pin 1 keyswitch input (KSI)

Pin 2 interlock input

Pin 3 Mode Select 1 input

Pin 4 Mode Select 2 input

Pin 5 Fault 1 output

Pin 6 Fault 2 output

Pin 7 emergency reverse input

Pin 8 pedal switch input

Pin 9 coil return input

Pin 10 forward input

Pin 11 reverse input

Pin 12 hour meter enable output

Pin 13 throttle: 3-wire pot high

Pin 14 throttle: pot low

Pin 15 throttle: 3-wire pot wiper or 0–5V

Pin 16 throttle: 2-wire 5kΩ–0 or 0–5kΩ input

Pin 17 main contactor driver output

Pin 18 auxiliary contactor driver output

Pin 19 reverse signal driver output

Pin 20 electromagnetic brake driver output

Pin 21 (not used)

Pin 22 emergency reverse check output

Pin 23 (not used)

Pin 24 (not used)

A 6-pin low power Molex connector is provided for the CAN Bus interface.
However, the CAN Bus option must be specified for this interface to be active.
The mating connector is a Molex Mini-Fit Jr. p/n 39-01-2065 using type 5556
terminals.

Pin 1 +15V supply (limited)

Pin 2 ground return (B-)

Pin 3 CAN H I/O line

Pin 4 L termination

Pin 5 H termination

Pin 6 CAN L I/O line

The +15V supply should only be used with the CAN system or speed sensor
and not to power any other external systems.
The L and H terminations provide a 120Ω termination impedance for
the CAN H I/O and CAN L I/O inputs if necessary. Refer to the Curtis CAN
Protocol Document to determine the proper termination for a given application.
A 4-pin low power connector is provided for the handheld 1313 programmer
or 1314 PC programming station. A complete programmer kit, including the
appropriate connecting cable, can be ordered from Curtis.
If a programmer is already available but has an incompatible cable, the
1244 mating cable can be ordered as a separate part: Curtis p/n 16185.

3：Standard wiring configuration, Curtis 1244 controller

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