Blue Ox Review of wiring diagrams [24 July 2007]
Curtis 1253 Manual, Rev. F
1
Blue Ox Rev. A, draft #1 [3 August 2007]
1 — OVERVIEW
OVERVIEW
e Curtis 1253 provides a cost-eective solution for control of high power
DC series-wound hydraulic pump motors. Its system integration features are
designed primarily for Class I and Class II material handling vehicles. Typical
applications include the pump systems of material handling trucks (counter-
balance trucks, reach trucks), aerial lift platforms (scissor lifts, articulating/
telescoping booms), and other industrial vehicles.
e 1253 accepts inputs from up to four Speed Select switches and also
from an analog throttle. Its internal microprocessor-based logic controller pro-
vides maximum exibility at minimum cost. Its performance characteristics can
be tailored through an array of programmable parameters.
e 1253 controller is fully programmable through a Curtis handheld
programmer or PC Programming Station. e programming device provides
diagnostic and test capability in addition to conguration exibility.
1
Fig. 1 Curtis 1253
hydraulic pump motor
controller.
Like all Curtis motor controllers, the 1253 oers superior operator control of
motor speed and torque.
Smooth and Quiet Control
✓ Programmable acceleration rates provide smooth application
of pump motor torque
✓ 15.6 kHz PWM frequency for near-silent operation.
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