The user who has used the car GPS locator, especially the connected GPS locator, must be familiar with the function of "remote power cut off".However, this function is often followed by a text that reads: it should be used together with the relay.What is a relay?What does it do?Must it be installed?Today, xiao bo will share with you about the car relay knowledge, hope to bring help to you!

一、The function of automobile relay

Simply put, the automobile relay is equivalent to a switch, play a role in changing the control circuit, it is the key to control the circuit on, off.

The function of automobile relay is the same as that of general relay, which is mainly to control the intermediate link of the next circuit.With the help of the magnetic force of the magnetic field, the armature attracts and conducts the circuit, thus promoting the disconnection of contact normally closed contact.It mainly serves as:

1. Switching function;

2. Overload power off protection function;

3. Protection function of power failure.

二、 Composition of automobile relay

It mainly consists of magnetic circuit system, contact system and recovery mechanism.The details are as follows:

1. Magnetic circuit system is composed of core, yoke, armature, coil and other parts.

2. The contact system is composed of static reed, moving reed, contact base and other parts.

3. The restoring mechanism is composed of: restoring reed or tension spring.

三、 Classification of automobile relays

1. By purpose:

Two kinds of relay can be divided into functional type and control type.For example, flash relay and wiper relay are functional relays, while ordinary relays with simple circuit switching and switching are control relays.

2. According to the contact state:

It can be divided into three types: normally open type, normally closed type and mixed type.3. According to the control mode:

Can be divided into current type and voltage type relay.

(1) current-type control relay is a relay that operates according to a certain current value;It and other components of the practical circuit, such as: the car's flash relay, the greater the current, the higher the flash frequency.

(2) voltage type relay is a relay operating at a certain voltage value. When the voltage of the controlled circuit is greater or less than a certain threshold value, the relay will automatically open or disconnect the controlled circuit.For example: light relay, horn line relay and so on.Voltage relay is mainly used to control the circuit of large current consumption. The coil control voltage of this relay generally needs to be greater than 7V to work, and less than 5V to stop working.

4. By connection:

Separable terminal type and plug type.

5. According to the protection method:

Divisible resistance protection type and diode protection type.

四、 Relay wiring instructions:

1. Firstly, find the positive pole line of the oil pump and cut off the positive pole line;

2. Connect the positive pole lines of the oil pump with the two green lines of the relay;

3. The white line of the relay is connected with the electric end of the positive pole line of the oil pump with shear;

4. The yellow line of the relay is connected with the yellow line of the locator.

五、warm tips:

1. The white line of relay is the power supply line of relay, and it is not recommended to connect directly with the power supply line of automobile battery;

2. The yellow line of the relay has no voltage. When the oil is cut off, the locator will give a negative signal to the relay.Check whether the relay is good or bad, you can directly put the relay yellow wire iron, see whether the relay has action.

(if the above conditions are not met, the locator should be changed to another position, and the status should be inquired again, and the position should be adjusted until the GPS signal value is ideal.Weak GPS signal value will lead to the locator positioning slow, inaccurate, or even not positioning.