Wiring method of time relay
1. Control wiring
You think of it as a DC relay. 3. 7 is used to connect to 12V control voltage; 2. 7 is used to connect to 24V control voltage. 7 of them are used as the negative electrode of direct current, which is connected to the neutral line when used. 2. Connect to a 220V live wire.
2. Work control
Although the control voltage is connected, the timer on the panel determines whether it plays a control role.
3. Functional understanding
It is a switch, single-pole double-throw, with a movable point movable arm, just like the movable arm of a common knife switch. 8 is the active point, 5 is the normally closed point, when the relay does not move, the two of them are connected. When moving, 8 and 6 are connected.
4. Load wiring
The neutral or negative pole of the power supply is connected to the neutral or negative pole of the electrical appliance. The live wire or positive pole of the power supply is connected to 8 pins, the live wire end or positive pole of the electrical appliance is connected to 6 pins, and the 5 pins are idle.
5. Principle
During the period when the timer is invalid, 8 and 5 are connected, which is equivalent to our usual light switch disconnected state. When effective, the relay acts, 8 and 6 are connected, and the electrical appliances are energized to work, which is equivalent to our usual light switch on state.
The role of the time relay
Time relays are widely used in remote control, communication, automatic control and other electronic equipment, and are one of the most important control components. There are mainly types of time relays, such as air damping type, electric type and electronic type. At present, the commonly used time relay is a large-scale integrated time relay. Time relay is not widely used in production equipment, it can accurately grasp the proportion of time, and improve the accuracy and performance of the product a lot.
The time relay has the function of automatic monitoring, and the time relay and other equipment are put together to form a program space route to realize the automatic operation of the equipment. Many smart products use time relays as a device.
Classification and use occasions of time relays
1. Power-on delay type
2. Power-off delay type
3. Automatic flipping transformation (first on and then off after power-on, always circulating)
Occasions of use
1. Power-on delay type, such as the time relay is energized after the A load is energized, and the B load can be connected after the delay. Reset after power loss
2. Power-off delay type, such as A load is energized, and then after power-off, the time relay loses power, and after the delay, B load can be connected. Reset after power loss
3. Automatic flip transformation, such as when the time relay is energized, A load is powered on first B loses power, and B loses power after delay, so that A load and B load can take turns to work.
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