Cantilever control box PLC control cabinet electrical component layout

Thereby preventing the spread of drug-resistant bacteria. The KEALA cantilever control box seems to be an indispensable component in people's lives, and its scope of application is becoming wider and wider, because with it all things seem to be simplified. Now we have entered the era of intelligence. The era of intelligence requires cantilever control boxes. In this era of intelligence, we are not limited to the need for cantilever control boxes. We need many products to be intelligent. The general cantilever control box is made of a combination of high-strength aluminum profiles and special components. It can be said to be a frame system with both strength and stability, and its panel is composed of high-strength density boards. This cantilever control box is easy to disassemble and flexible to use. At the same time, the board can be made into any straight line, square angle and arc shape. The advantage of the oversized cantilever control box is the modular design concept of the unit. Therefore, it has many standard equipment installation units. From a small screw to the panel of the cantilever control box are the embodiment of the modular design of this series of cantilever control box.
It is composed of high-quality anodized aluminum profiles and aluminum die-cast corner parts. Simple design and stable structure. The anodized aluminum profile is easier to wipe, keeping the box bright and new. It is widely used in the installation of various man-machine interfaces and accessories on CNC machine tools, assembly lines and special equipment. With the cantilever or support system, it can fully meet the actual operation requirements, and the body size is completely customized according to the needs.
Whether it is a sheet metal cantilever control box or any other type of cantilever control box, it has its own processing process. The processing methods of cantilever control boxes of different materials are also different. What is the processing process of the sheet metal cantilever control box? Generally speaking, the processing technology of the sheet metal cantilever control box has to go through the operations of batching, melting, casting, surface pretreatment, anodizing and sealing, so how are these processes made? 1. Ingredients: Produce specific alloy grades according to customer needs, and calculate the amount of addition of various alloy components, and rationally match various raw materials. 2. Smelting: The prepared raw materials are added to the melting furnace for melting according to the process requirements, and are melted by means of degassing and slag refining. 3. Casting: The melted aluminum liquid passes through the deep well casting system under certain casting process conditions , Cool casting into round cast rods of various specifications. 4. Surface pretreatment: use chemical or physical methods to clean the surface of the profile to produce a pure matrix. , Hot selling, the reasons are as follows: 1. The products of sheet metal electric control boxes and electric control cabinets in traditional industries are relatively thin, of poor quality, painted, and easy to fall. There are many markets, short service life and unattractive appearance. 2. The product design of domestic traditional sheet metal processing is unreasonable, and the user process is not user-friendly, and the functions are not complete; the product design is reasonable, combining humanity and practicality; 3. The quality of traditional products is not enough, iron products plus quality The general surface treatment is easy to cause rust and erosion. The blind pursuit of low cost leads to material and thickness cuts and cuts, which is easy to deform after a long time; the cantilever adopts aluminum material, which has the advantages of light material, corrosion resistance, good color and stable structure; 4 The traditional design is not beautiful enough, and the cantilever modular design replaces the traditional welding and polishing with aluminum profiles and aluminum die-casting corner parts. The anodized aluminum profiles are easier to wipe and keep the cantilever bright and new;
Machine tool cantilever operation box manufacturers customize cantilever box manufacturers to share in the increasingly popular cabinets now, many people will buy cabinets because of different needs. The corrosion of the cabinet has become a problem that people have to pay attention to at this time. Some people may feel that as long as they buy a stainless steel cabinet, they can do it once and for all, without considering the corrosion of the cabinet. actually not. Even if the stainless steel cabinet is made of stainless steel, it has outstanding performance in corrosion protection, but it does not mean that it will not really corrode. The anti-rust ability of stainless steel mainly comes from the chromium-rich oxide film on the surface layer. Although this layer of protective film is very thin, it has a solid and dense structure, which can effectively prevent the penetration of oxygen ions and avoid internal metal corrosion. However, when an electrochemical reaction or a chemical reaction occurs on the surface, uniform corrosion is likely to occur, destroying the weak parts in the surface passivation film, and then forming a pitting corrosion reaction, resulting in small holes on the surface of the stainless steel, causing further corrosion inside and destroying the body structure . Therefore, proper anti-corrosion measures for stainless steel cabinets are very important. And there are very significant advantages in price and delivery time; at the same time our products are more comprehensive, we combine the actual use needs of domestic and foreign customers, design more products for customers to choose to use; machine tool industry, plastic machine industry, machinery industry The higher requirements for cantilever quality and appearance, as well as the increased demand for cantilever in the photovoltaic and solar industries, have made our products a leapfrog breakthrough in the new year.
Cantilever control box control cabinet electrical component layout

The PLC control cabinet refers to the programmable control cabinet, and the control cabinet refers to the complete set of control cabinet, which can realize the control of the motor and switch. The PLC control cabinet has protection functions such as overload, short circuit and phase loss protection.

PLC control cabinet can complete equipment automation and process automation control, achieve perfect network function, stable performance, scalability, strong anti-interference and other characteristics, is the core and soul of modern industry. PLC control cabinets and inverter cabinets can be designed according to user needs to meet user requirements, and can be matched with human-machine interface touch screen to achieve the purpose of easy operation. The device can also communicate with the DCS bus host computer modbus, profibus and other communication protocol data transmission; industrial control computer, Ethernet and other control and monitoring.

01 PLC control cabinet structure

air switch
A total air switch, this is the power control of the entire cabinet. I believe that every cabinet must have something.

PLC
This should be selected according to project needs. For example, if the project is small, it can be directly an integrated PLC, but if the project is relatively large, it may require modules and cards, and it may also require redundancy (that is, the two sets are used interchangeably).

power supply
A 24VDC switching power supply, most PLCs are equipped with a 24VDC power supply, according to whether you really need to decide whether you want this switching power supply.

Relay
Generally, PLC can directly send instructions to the control loop, but it may also be relayed by the relay first. For example, if the output of your PLC is powered by 24VDC, but the picture drawn in your control loop requires that the node supplied by the PLC is 220VAC, then you must add a relay to the PLC output, that is, the command is issued When the relay is activated, the node of the control loop is then connected to the normally open or normally closed point of the relay. Whether to use the relay is also selected according to the situation.

Terminals
This must be essential for every cabinet and can be configured according to the number of signals. If it is just a simple PLC control cabinet, these things are basically needed. If there are other things in your control cabinet, it depends on the situation. For example, you may need to supply power to some on-site instruments or small control boxes, and you may have to increase the number of air circuit breakers. Or if you want to connect the PLC to the host computer, you may need to add a switch or something. It depends.

02 Layout of electrical components of PLC control cabinet

In the process of industrial control design and maintenance, it is inevitable to deal with wiring and circuit layout. However, a mature industrial control design scheme is inseparable from reasonable and standardized circuit layout and wiring.

When we open a control cabinet with wiring specifications and clear signs, what is displayed in front of us is like a clear and realistic wiring diagram. Through this "wiring diagram" we can easily find details such as equipment failures and line signal conditions.

The following is a wiring layout and related details of a wiring cabinet that I want to share with you.

figure 1
Figure 1 is a distributed IO module wiring control cabinet. This IO wiring cabinet has been used for nearly 10 years. Although it has undergone many repairs, it still maintains its original status quo. This is mainly due to its specifications and clearly marked wiring. Now divided into several partial diagrams to share with you the advantages of the wiring of several parts that are considered bright spots. In this way, it plays a role of throwing bricks and introducing jade.

figure 2
Figure 2 is the module layout of the control cabinet (Figure 1). The slot code is marked on the trunk cover. Very eye-catching, easy to find the rack number where the corresponding module is located during maintenance.

image 3
Figure 3 is the module side connection of one input module in the cabinet and the wiring diagram from the field to the module side. It is connected through a terminal block: the left side leads to the module; the right side is the signal line from the field device to the module. The white marks below are the rack number of the corresponding module (EU2 rack B), the module slot number (slot number is 6), and the module type (digital input).

Figure 4
Figure 4 is the control signal power supply of each field device in the cabinet. That is, each device has a separate control power supply. This power supply is connected to the main circuit in series through a 2A fast-acting fuse. Once the control signal of a field device is short-circuited or overloaded, the fast-acting fuse will blow out, and the circuit will be broken by the fast-acting fuse. The LED light on the seat lights up.

The advantage of this circuit layout is that the control signal source of each device is relatively independent. Once one of the faults occurs, the other devices are not affected, and the fault search range is very small and very obvious, which facilitates maintenance and shortens the maintenance time.

Installation Environment:
1. Ambient temperature range:-5 ℃ ~ + 40 ℃;
2. Air humidity range: 5% ~ 90% RH, no condensation;
3. Altitude: below 1500 meters;
4. The inclination of the installation surface and the horizontal plane does not exceed 5°;
5. No significant shaking and shock vibration at the installation place;
6. There is no large amount of oil mist, dust or fiber dust at the installation place;
7. The use category is AC-3;
8. Pollution level is 3;