ELECTRIC POWER STEERING CONTROLLER MODEL 1222 FEATURES Advanced Motor Control • Absolute Position (pedestrian stacker) or Relative Position (reach truck) control modes. • Supports >360° multi-turn steering mode. • Indirect Field Orientation (IFO) vector control algorithm provides maximum possible torque while ensuring maximum efficiency and accurate current control. • 16 kHz PWM switching frequency ensures silent operation across the 0–200 Hz stator frequency range. • Advanced PWM techniques produce low motor harmonics, low torque ripple, and minimized heating losses, resulting in high efficiency. • 70A RMS 2 minute current output. • 24–48V nominal supply voltage. Versatile Steering Input and Feedback Options • Steering command input via CAN, dual redundant quadrature encoder, Sin/Cosine sensor, Sawtooth and Analog inputs. • Steered angle feedback via dual redundant homing switch, quadrature encoder, Sin/Cosine, Sawtooth or Analog voltage inputs. DESCRIPTION The Curtis Model 1222 is an AC induction motor controller for ‘steer by wire’ electric power steering systems. In these systems, the steering motor functions as an actuator to change the angle of the vehicle’s steered wheel(s) and so change the direction of travel. The Model 1222 performs as the steering system controller, interpreting the steering command input and wheel position feedback, then driving the steering motor to move the steered wheel to the desired position. • Configurable homing methods, center offset, auto-center and end-stop protection functions. • Programmable force feedback driver for command input devices featuring variable friction tactile feedback (TFD). Maximum Safety • Dual redundant configuration of all safety relevant parts. • Two microprocessors, each with its own separate EEPROM memory. APPLICATION Designed for 300–1500W AC induction gearmotors. Intended applications are materials handling vehicles such as reach trucks, order pickers, stackers, ‘man up’ warehouse trucks and other similar industrial vehicles. • Fully programmable input/output ratio mapping functions. • Separate input paths to each micro for all input and feedback signals. • 5A high-side fault output driver consists of 2 switches connected in series, each switch controlled by one micro with independent supervision. • Meets the requirements of the latest international functional safety standards. www.curtisinstruments.com 1

MODEL 1222 FEATURES continued Robust Reliability Unmatched Flexibility • Insulated Metal Substrate (IMS) powerbase ensures superior heat transfer. • CANopen system communications. • Intelligent thermal cutback, and overvoltage/undervoltage protection functions maintain steering while reducing traction speed until severe over/under limits are reached. • 35-pin AMPseal logic connector. • Software includes a library of over 20 pre-defined AC steering motor types from various manufacturers. • Rugged sealed housing and AMPseal connector for use in harsh environments. • Programmable motor temperature...

MODEL 1222 TYPICAL WIRING DIAGRAM J1-24 Home Input 2 † CAN High J1-23 J1-23 J1-12 Home Input 4 † CAN Low J1-35 J1-35 J1-1 Keyswitch Interlock Input 3 N.O. J1-10 N.C. HOMING SWITCH FORCE FEEDBACK COIL J1-13 Coil Return Force Feedback Driver J1-21 +5V J1-8 Command Analog 1 J1-19 J1-9 Contactor Driver † An external 120Ω resistor may J1-13 J1-2 be required at the 1222 end of the CAN bus. B+ STEER CONTACTOR EMERGENCY STOP Ground BATTERY (24–48V) STEER COMMAND POTS * * +5V Command Encoder 1A Command Encoder 1B Command Encoder 2A Command Encoder 2B Ground BMotor Temp Sensor +5V Steer Motor Encoder 3A...

CONNECTOR WIRING ■Status LEDs WA RRANTY Two year limited warranty from time of delivery. is a trademark of Curtis Instruments, Inc. Specifications subject to change without notice