PC400 Komatsu engine and hydraulic pump controller function explanation

When the controller determines that it is necessary to change the engine speed and the output of the hydraulic pump, the controller will drive the governor actuator and the proportional pressure reducing valve. Each input and output of the controller passes through two 40 pins (pins). The connector is connected to the machine harness.

1 input / output

The automatic data transmitter is a two-way component. The automatic data transmitter allows the controller to receive and transmit information. The automatic data transmitter allows the excavator controller and monitor to communicate. The automatic data transmitter is not a visual component. The automatic data transmitter includes Internal control circuit and connection harness wiring. The controller sends information via the data auto-transmitter, such as fuel level, engine coolant temperature and power mode selectable on the monitor panel.

The controller can also receive the required information from the monitor panel, such as power mode and fine-tuning control mode.

2 input

Each input provides information about the machine system. There are two types of inputs: switch inputs and sensor inputs. Excavator spare parts Switches and harnesses provide disconnect and ground status for the controller. Sensors and harnesses provide varying signals to the controller.

3 switch input (key switch)

The key activation switch input is connected to the controller via the contact 4 of the connector 1. The key activation switch provides the controller with input information regarding the state of the key activation switch. When the key activation switch is in the ON position, this input is the battery. positive electrode.

PC400 Komatsu engine and hydraulic pump controller function explanation

4 switch input (operation type)

5 sensor input (frequency)

The frequency sensor input (connector contacts 2-24) will send an AC signal. The AC signal can indicate the speed of the machine system. The engine speed sensor provides the AC signal to the controller. The controller measures the frequency of the AC signal (Hz). The controller will Make a decision based on the speed of the export.

6 sensor input (alternator)

The sensor input of the alternator is connected to the connection contact 2-34. There is a square wave signal in this input. The signal indicates the speed of the alternator.

The controller measures the frequency of the square wave signal (Hz). The controller uses this information to make decisions and monitor the output of the alternator. When an abnormal condition occurs, the controller alerts the operator.

7 sensor input (PWM)

Each of the following contacts is input to the controller: 2-9, 2-13, 2-21, and 2-30. The PWM signal is sent by these contacts and the signal indicates the condition of the machine system. For example, the monitor The temperature can be monitored, the PWM sensor can provide this information, the controller measures the intermittent load of the PWM signal, this signal represents the information being measured. The controller uses this information to make a decision. When an abnormal condition occurs, the controller will remind the operation. By.

8 sensor input (voltage)

9 output https://jnjmzm.wixsite.com/sdjygcjx