JOINT GP 0988883 - Caterpillar

The controller actuates the governor actuator and the proportional reducing valve if the speed of the engine must change. Each input and output of the controller is connected to the machine harness through two 54-pin connectors. Input/Output
The data link is a bidirectional component. The data link allows the controller to receive information and the controller can send information. The data link is designed to allow communication between the controller and the monitor. The data link is not a visible component. The data link consists of internal control circuits and the connecting harness wiring. The controller sends information through the data link to the monitor panel. The following list contains some examples: fuel level and engine coolant temperature. The controller also receives requested information from the monitor panel.Input
Each input will describe the status of the machine system. Two types of inputs exist: switch type and sensor type. Switches provide an open or ground to the controller. Sensors provide a signal that changes to the controller.Switch Input (Keyswitch)
The input of the key start switch connects to the controller through connector 1 and contact 23. The key start switch will provide input information to the controller about the status of the key start switch. The input for the key start switch is +battery when the key start switch is placed in the ON position. Switch Input (Operational Type)
Each switch input will provide information about operator requests and machine systems. The condition of the system is sent to the controller through each input. The status of each input will be grounded, open or +battery. Each input of the controller will receive information from the switches that are located in the machine systems (pressure and temperature).Sensor Input (Frequency)
An AC signal is present for the input of the frequency sensor. The AC signal is used to represent the speed of a machine system. For example, the engine speed sensor provides an AC signal to the controller. The controller measures the frequency (Hz) of the AC signals.Sensor Input (Alternator)
The sensor input for the alternator connects to connector contact 2-35. A square wave signal is present at this input. The signal is used to represent the speed of the alternator. The controller measures the frequency (Hz) of the square wave signal. The controller uses this information to make determinations and the controller uses this information to monitor the output of the alternator. When an abnormal condition exists, the controller will alert the operator. Sensor Input (PWM)
The controller receives a signal that is Pulse Width Modulated. This signal will represent the condition of a machine system. For example, the controller can monitor pressure. PWM sensors provide this information. The controller measures the duty cycle of the PWM signal. This signal will represent the information that is measured. When an abnormal condition exists, the controller will alert the operator. Sensor Input (Voltage)
Connector "2" has an input for voltage sensing. A voltage is present. This voltage will represent the condition of a machine system. For example, the level