Three Types of Switches

Ignition Switch

The ignition switch is actually the system switch of the machine. Generally speaking, a key is required to open the ignition switch. The ignition switch is the main circuit of the coil that can be freely opened or closed.

In today's society, the concept of the traditional ignition switch is still a problem worthy of attention for the driver. If the key routine start includes functions such as tuning memory, the one-key start button must be activated when it receives the presence of the smart key, and the sensing distance is generally about 50 cm.

Under normal circumstances, there are also what we usually call keys with serrated fire grooves in smart keys. Its function is to prevent the mechanical start method to start when the one-key start function fails. The ignition switch is started by inserting the key and holding it for about 1 to 2 seconds in each gear momentarily. This is to hear the sound of electrical equipment is powered on and then enter the next gear.

PTO Switch

PTO means auxiliary power output, which is a kind of power output, also known as power take-off. The machine has high requirements for the speed and precision of the PTO engine, which is actually controlled by the ECU. The ECU determines the vehicle speed by extracting the signals of the PTO switch and the PTO potentiometer, thereby controlling the vehicle speed. It is a device that outputs the power of the engine to equipment other than the vehicle drive system. It is one of the ways to be able to get power from a power source.

The principle is that after the machine is started, a certain target speed is set through PTO, and the engine will stabilize at this speed under the action of the control system so that the speed of the vehicle can be maintained at a certain speed, even if the accelerator is stepped on, the speed will not change, you can Increase the flexibility of the machine and meet the requirements of different machines for PTO functions. To achieve such an effect, PTO switch john deere can satisfy you.

Pressure Switch

A pressure switch is a simple pressure control device. When the measured pressure reaches a certain set fluid pressure, the pressure switch will issue an alarm or control signal.

The working principle of the pressure switch is that when the measured pressure exceeds the rated value, the free end of the elastic element is displaced, the switching element is pushed directly or after comparison, and the on-off state of the switching element is changed to achieve the purpose of controlling the measured pressure. Generally, an "electric contact pressure gauge" is used, which is an ordinary tube spring pressure gauge, plus two sets of electrical contacts. The electrical contacts of relatively high and low pressure can be connected to control the pressure between the upper and lower limits. This kind of electrical contact has a small capacity and can only be used on the control coil of the switch contactor.