GUARDRAIL AS 4517401 - Caterpillar

Alternator
The frequency output terminal of the alternator is connected to connector contact 2-35 of the controller. The controller will monitor the signal on this circuit. This signal informs the controller about the relative speed that the alternator is rotating. The frequency output terminal of the alternator is the "R" terminal. Data Link
The data link is an input and an output of the controller. The data link connects to the controller at connector contact 1-33 and 1-43. The data link is designed to carry communications between the controller and the monitor. The data link is not a visible component. The data link consists of internal control circuits and a harness wiring. The data link is bidirectional. The controller can receive information and the controller can send information through the data link. The controller sends information about the fuel level, engine coolant temperature and many other signals to the monitor panel.Action Lamp
The FLASHING of the action lamp is designed to inform the operator about a condition that exists that requires a change in the operation of the machine. The controller will instruct the monitor panel to FLASH the action lamp when the controller determines that a warning category of 2 or 3 is present. Action Alarm
The action alarm connects to connector contact 2-23 of the controller. The SOUNDING of the action alarm will alert the operator when a high emergency condition is present. For example, the engine oil pressure decreases below a set value.Travel Alarm
The travel alarm connects to connector contact 2-13 of the controller. The SOUNDING of the travel alarm will alert the area that the machine is moving.Note: On M325C MH, the travel alarm is connected to J2-44 on the power train controller. The SOUNDING of the travel alarm will alert the area that the machine is moving and that the cabin is moving down.Input for Air Heater Indicator
If the machine is equipped with an air heater, the air heater will be activated by the key start switch. The air heater will only activate if the temperature of the engine coolant is low. The controller will send a signal to the monitor. The monitor will show an indication that the air heater is active.