English Views: 155 Author: Site Editor Publish Time: 2022-10-11 Origin: Site
The panel door limit switch is a switch used to automatically detect and sense the opening and closing of the door or the presence or absence of an object. Usually, door limit switches are equipped with levers, knobs and plungers. Once an object comes into contacting with the limit switch for door, the sensor will displace the actuator and establish or disconnect the electrical connection. The most common example is once the refrigerator door is opened, the refrigerator light will glow.
The door micro limit switch can be used to count items or materials to detect the limit, so that the switch is closed or opened when a specific quantity is reached. For example, mechanical limit switches are installed in specific equipment to detect multiple predetermined components added to the product. The limit switch moves the actuator, causing the equipment to move away, thereby transporting the product to the next station. In addition, the door proximity limit switch can also be used as a safety interlock, mainly to prevent machine parts from moving further after reaching a certain point. As a practical example, a garage door opener has a door limit switch that can be closed once it reaches the open or closed position. If there is no door limit switch, the garage door will keep moving down and eventually hit the ground, which will cause damage to the garage door.
The waterproof limit switch improves efficiency and reduces costs by establishing the connection between the physical domain and the electrical domain. Limit switches have been invented decades ago, and their multi-functionality makes them one of the common control system components. At the same time, due to its simplicity and low cost, limit switches have been widely used for decades and have become important products in the manufacturing industry.
1. Detection and Counting Products
In the product detection system, when the product moves to the door limit control switch, the switch sends a signal to the control system. Through the PLC ladder, the system calculates the number of the product pressing the door limit switch, and finally displays the number on the counter for the operator.
2. Protect Personal Safety
The door position limit switch can be used to detect whether the safety protection device of the machine is open or not. If the guard is opened when the machine is not started, in this case, the door limit switch will prevent the guard from starting. In another case, if the guard is opened during operation, the machine will stop moving. In both cases, whether the door limit switch is activated or not is to protect the operator from any potential injury.
3. Protect the Safety of the Machine
The safety limit switch application can also be used to protect the machine from accidental damage. For example, the end of the arm tool, the motor clutch, and the parts that will damage other components if they fail, such as gears and shafts.
