PLC control cabinet is an important device in industrial automation, helping to control and operate machinery accurately and efficiently. With flexible programming capabilities, PLC electrical cabinet plays a key role in modern production systems. So PLC control cabinet What is its structure, how does it work and how does the production process take place? Let's find out together Tan Long Find out more in the article below!
What is PLC control cabinet?
PLC (Programmable Logic Controller) control cabinet is a type of electrical cabinet programmed by software PLC HMI, allowing automatic control of mechanical systems in industry according to the requirements of the production process. Operation and monitoring are performed through operators and operations on the touch screen.
The birth of PLC control cabinet aims to improve labor productivity, increase accuracy and production efficiency. To achieve automation in the production process as well as work related to machinery in the mechanical industry, the use of controllers is indispensable to liberate human labor and optimize working time through the application of modern technology. PLC control cabinet was born to perfectly meet all of the above requirements.
Often used to control conveyors in production lines such as in the ceramic tile, carton, dairy, and many other industrial applications.
PLC control cabinet Usually installed in the control area of industrial buildings and factories. Use PLC to control actuators to increase machine productivity and reduce labor.
Commonly used materials include CT3 steel, stainless steel (inox) such as SUS 201, SUS304. Production technology often includes CNC laser cutting, CNC punching, robotic welding, and protective powder coating.
Assembly equipment is often imported from famous brands such as LS, ABB, SCHNEIDER, FUJI, HYUNDAI, MITSUBISHI, SIEMEN.
All electrical cabinets are manufactured in strict compliance with the ISO 9001-2008 quality management system and Vietnamese & International electrical standards, ensuring compliance with international standards IEC 60439-1:2004.
Components of PLC control cabinet
The structure of PLC control cabinet includes:
- PLC equipment: Considered the brain of PLC control cabinet, PLC processes and controls the entire system.
- HMI (Human-Machine Interface): The part that displays the entire operating program of the system. HMI is the lifeblood of the system and also the most expensive device.
- APTOMAT: Manual switching devices for important controls, helping to protect and control large and small currents.
- Contactor: Periodically close and open the power circuits. Contactors help supply power to devices without the current exceeding the overload limit.
- Thermal relay: The device automatically cuts off the current when the load exceeds the specified level due to thermal expansion of the metal bar.
- Intermediate relay: Works similar to a contactor but only allows a smaller current to flow through, used in control circuits.
- Transformer: Usually 24VDC type, providing power for control circuits or PLC. Can use 220VAC power directly if needed.
- TIMER: Count the operating time of the device, helping to control the operating time according to customer requirements.
- Auxiliary materials: Includes devices such as light bulbs, push buttons, emergency buttons, connectors, wire trays, and other accessories.
Technical specifications of PLC control cabinet
With optimal design, PLC control cabinets receive much attention today. Below is a detailed technical specification table of the PLC control cabinet line:
| Characteristic / Characteristic | Descriptions |
|---|---|
| Rated insulation voltage | 1000V AC |
| Rated working voltage | 690V AC |
| Rated frequency | 50/60 Hz |
| Peak surge withstand voltage | 12 kV |
| Control circuit voltage | 230V AC max. |
| Pulse type | IV |
| Pollution tolerance level | 3 |
| Rated current (ln) | 1250A |
| Rated cutting capacity 1 second | 25kA |
| Maximum cutting capacity | 53kA |
This specification sheet provides an overview of the capabilities and operating limitations of the PLC control cabinet, helping you choose the right device for your needs.
Operating principle of PLC control cabinet
When the devices are activated (in ON or OFF state by external physical control devices), a programmable controller will continuously repeat the user-set program and wait for signals to appear at the input to output signals at the output.
To overcome the limitations of wired controllers (Relay controllers), people have developed PLC to meet the following requirements:
- Easy programming, easy to learn programming language.
- Compact design, easy to maintain and repair.
- Large memory capacity to accommodate complex programs.
- Total reliability in industrial environments.
- Ability to communicate with other smart devices such as computers, networks, expansion modules.
- Competitive personal pricing.
PLC electrical cabinet features
PLC control cabinet is composed of the main ingredient PLC controller. The sets PLC control There are many different types, from famous brands such as LS, ABB, Schneider, Mitsubishi, Siemens,... PLC controller performs the function of receiving and emitting signals, mainly analog signals. Thanks to that, PLC control cabinet Smart operation, supports control modes such as Timer, PID, counting,...
From these controllers, the system designer will take signals through intermediate relays, contactor contacts and thermal relays. These signals are then used to control pumps and motors, meeting the requirements of the electrical system.
Function of PLC electrical cabinet
Thanks to the intelligence of the mentioned controllers, the manufacturer has designed and produced PLC control cabinet with the main functions optimized as follows:
- Product on/off switch (ON/OFF): Used to turn on/off pumps, engines, motors...
- Counter control: Used to control the number of counts.
- Timer: Control the opening and closing of doors according to time, running in sequential order according to the server's needs.
- Inverter control (PID): High-demand control, frequency converters serve industries related to water treatment, such as wastewater treatment. In addition, there are industries including motor control, motors, etc.
In addition to the above automatic control functions, PLC control cabinet also connected to the monitoring system and SCADA remote control to monitor and control pumps and motors. This feature is important when applied in hazardous areas such as hazardous chemical industries or in mines…
Structure of PLC control cabinet
All the PLC control cabinet All have a main component which is RAM program memory inside. The microprocessor has a communication port to connect to PLC control cabinet. In addition, there are input and output modules.
If the programming device is portable, the memory RAM usually the type CMOS with battery backup. Once the program has been tested and approved, it is transferred directly into memory. PLC. Here the data is ready to use. The PLC large are often programmed into a computer to support the writing, reading, and testing of programs. The programmer is connected to the PLC through interfaces such as RS232, RS422, RS485, ...
Advantages of PLC control cabinets
PLC (Programmable Logic Controller) electrical cabinet has many advantages, including:
- Flexible programming: PLC allows flexible programming and easy changes to the control program. Users can change control logic, adjust parameters and implement new functions quickly without changing hardware.
- Integration and expansion: PLC electrical cabinet The ability to integrate multiple input/output modules and communicate with other devices such as computers, networks, sensors, instrumentation and other control systems. This allows the control system to be expanded and customized according to specific application needs.
- High reliability: PLC control cabinet designed to operate reliably and reliably in harsh industrial environments. They are able to withstand the temperature, humidity, vibration and electromagnetic interference conditions found in industrial environments.
- High performance: PLC capable of handling control tasks quickly and accurately, allowing efficient operation and increased production capacity. Fast response time between input and output signals helps ensure precise and synchronized control during production.
- Data management and monitoring: PLC electrical cabinet capable of managing data and monitoring system operations. They can store information about the status of devices, record operational histories, and perform information monitoring and reporting functions.
- Easy maintenance and repair: With modular structure and easy component replacement, maintenance and repair PLC electrical cabinet becomes simpler than traditional control systems. This reduces downtime and saves maintenance costs.
In industry, usually, PLC control cabinet Often used and installed in common control areas of buildings and industrial factories to serve the purpose of controlling production systems such as: controlling conveyor belts in production lines, processing, packaging, etc.
Besides, PLC control cabinet Smart can connect to computer system, software for remote control. Flexible display, system error reporting if any, helps operation easier and more scientific.
Standard PLC control cabinet design and installation process
Design and installation process PLC control cabinet The standard consists of 6 steps, specifically as follows:
- Step 1: Research and survey customer needs and goals when installing PLC control cabinet.
- Step 2: Provide the best and most suitable solutions according to customer needs
- Step 3: Detailed quotation of items and contract signing
- Step 4: Design drawings specifically for customers based on needs and installation location, manufacture electrical cabinets and program appropriate PLCs.
- Step 5: Test run and adjust until stable operation.
- Step 6: Handover PLC electrical cabinet for customers, along with detailed instructions on how to use and things to keep in mind when operating the machine for customers.
Consulting, installing and designing PLC control cabinets
To install PLC control cabinet quality and stable operation, customers should contact reputable units in the market today for detailed advice. Starting from determining the needs and goals of customers, experts will choose the appropriate PLC and design the circuit in PLC control cabinet by following safety regulations and standards.
After programming the PLC according to the application requirements, it is necessary to thoroughly and continuously test to ensure the operation and safety of the equipment. After handover and installation, the supplier will have a periodic maintenance plan to ensure the system operates stably and avoid unexpected problems.
PLC control cabinet belong to Tan Long ensures stability and high performance in every automatic control application, from simple to complex industrial systems.
Tan Long - A reputable, quality supplier, designer and installer of control cabinets
Tan Long is a unit specializing in providing technical solutions, designing and installing complete industrial refrigeration systems, cold storage, cold storage for businesses and related equipment. Come to Tan Long, you will get:
- Our team of technicians consults, designs, and installs contact freezers according to the scale and purpose of the business.
- Support full installation, on schedule.
- Full service, one-time quote.
- Transparent and clear contract
Tan Long Proud to be one of the leading units providing technical solutions, design, construction and installation of freezing equipment systems in Ho Chi Minh City. If you need to design and install a refreezing conveyor, please contact us immediately. Tan Long via hotline (+84) 933357058 for specific advice and support.
