Section 1. Introduction to the Curtis PMC Controls Introduction to the Curtis PMC Controls
The Curtis PMC 1242 and 1244 controllers are separately excited motor speed controllers designed for use in a variety of material handling vehicles. CLARK uses the 1242 in the PWD model and the 1244 in the HWD model. Both controllers offer smooth, silent, cost effective control of motor speed and torque. A four quadrant, full bridge field winding control stage is combined with a single quad rant armature power stage to provide solid state motor reversing and either passive regenerative or plug braking power without additional relays or contactors. These controllers are fully programmable by means of the optional handheld 1307 programmer Clark part number 924648. Use of the programmer provides diagnostic and test capability as well as configuration flexibility. Both controllers offer superior operator control of the vehicle's motor drive speed.
Features include:
Full-bridge field and quarter-bridge armature power MOSFET design, Providing; Infinitely variable forward, reverse, drive, and brake control Silent high frequency operation High efficiency
Programmability through the 1307 handheld programmer Complete diagnostics through the 1307 programmer and the internal Status LED Continuous armature current control, reducing arcing and brush wear Automatic braking when throttle is returned to neutral from either direction; this "neutral braking'' provides a compression braking feel and enhances safety by auto matically initiating braking in an operator hands off condition Allows up to four user-selectable vehicle operating personalities Meets or exceeds EEC fault detect requirements Vehicle top speed is controlled and limited in each mode Linear temperature and under voltage cutback on motor drive 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 Copyrighted Material Intended for CLARK dealers only Do not sell or distribute
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