Class1 Throttle Interface CAT 105216 - Manual (Page 2)

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DOC 105216_e:\manuals\throttles\cat\New_CAT_Throt.p65-04252000
Throttle Interface Control Module
System Overview
The
Class1 Vernier Throttle Interface is designed to allow industry standard vernier style controls (such
as the Felsted Electronic Vernier II Control) and other potentiometer controls to be used with electroni-
cally controlled engines. This unit will work with electronically controlled Caterpillar Engines (C10,
C12, 3176, 3406, 3116B and 3126B) using a Pulse Width Modulated (PWM) Signal.
The interface converts a linear voltage input (potentiometer) into a PWM signal to control the engine.
True variable speed control is attained and the unit will maintain a selected engine RPM irrespective of
the engine load within it’s horsepower and torque capabilities. The interface can be used to govern
engine speed for various applications including PTO driven generators and pumps. There is an inter-
nal fast idle function that can be activated with a remote fast idle input (12 VDC)
Included in the package The throttle control is available alone or as a package shipped with the
following components.
Interface module
Vernier control
User manual
Mating Connector and wiring
Operation
Variable Throttle Control When the interface has power provided by the interlock circuit, variable
engine control is available to the operator using the vernier control. If the vernier control is open more
than 50% when power is applied to the interface, the interface will maintain the engine at idle RPM until
the throttle is closed and then re-opened. This feature prevents sudden unexpected increases in
engine speed when the unit is initially activated.
High Idle Control An input is available to bring the engine speed to a pre-determined engine RPM
(High Idle) from a remotely mounted switch or load management device. This speed is set by an
internal potentiometer.
Installation
Control Module The interface module requires minimal space (5” x 6” x1.5”) . The module is
watertight and may be mounted in any location that is not subject to extreme temperature or vibration.
Wiring The interface package comes with cables and leads to make the following connections:
Vernier Control
Power and Ground
Engine Control Signal
High Idle connection
Refer to the diagrams in the manual for specific wiring requirements.
Refer to the engine manufacturer’s Electronic Application & Installation Guides for detailed information
on engine electrical interfacing.
Overview