Air throttles are used to directly control the power output of engines. Air throttles are made in the following models:

Pulse Width Modulation (PWM) Throttles

This a microprocessor based product that converts control air pressure to pulse width modulation (PWM). Switch, 4-20mA, 0-9V/1-9V and RS 232 can also used as input to generate the PWM output signal. PWM is the required signal to throttle the CAT ECM from 0-100%. There is a serial interface provided to facilitate programming and setup. When multiple engines are chained together this throttle can be adjusted to even load distribution. This will also respond to serial commands to throttle the engine.

Analog Throttles

This a microprocessor based product that converts control air pressure to voltage (analog signal). Switch, 4-20mA, 0-9V/1-9V and RS 232 can also used as input to generate the analog output signal, which is the required signal to throttle the CAT ECM from 0-100%. There is a serial interface provided to facilitate programming and setup. This will also respond to serial commands to throttle the engine.