![]() In fact, this component does have a central processing unit where the logic program is stored. The PLC is akin to a computer’s CPU in that it serves as the brain of the entire panel. These blocks can be arranged in a strip along the DIN rail to route the power to the other components. Each block has two terminals that can join wires together. Terminal blocks are also used to route power to the devices inside the control panel. Power supplies can be configured for a variety of incoming power. Most industrial control is standardized on 24 VDC. Power supplies convert AC power to DC power. Normally mounted externally to save space, these are essential for small AC loads, like conveyor motors, heaters, and pumps. Transformers change the voltage of AC power. These surges can come from utility power surges or lightning strikes. This component protects all the other devices inside a control panel from electrical surges. The typical power that enters the panel can be anywhere between 120 to 480 volts.Īfter the power goes through the main disconnect, it will then be routed to a surge arrester. It usually has a handle outside the panel that lets users shut off power. Disconnects can be fused, non-fused, or a circuit breaker. While most of these components are inside the enclosure, there are devices located outside such as the HMI.Įlectricity for all of the devices comes into the control panel through the main disconnect. They can further be classified into two categories: components that route power and components that control and monitor the mechanical processes. These are the components that use electricity. The ducts help in keeping components organized and noise between devices managed. The wiring ducts serve as pathways for wires connecting the electrical devices. DIN metal rails provide a standardized mounting structure for the electrical devices that are to be attached. These panels hold DIN rail mounting and wiring ducts. Together, these ratings let users know whether the enclosure is:īack panels are metal sheets mounted inside the enclosure. Underwriters Laboratories or UL Safety Rating.The enclosure is typically made from steel, but different materials can be used based on the application.Įach enclosure will feature the following information on an attached metal plate: The number of doors indicate the sections of the enclosure and plays a part in determining its size. It comes in varying sizes, materials, and specifications to match the exact needs of the processes the panel is used for and the environment the enclosure is in. The enclosure is the metal box that houses the other components of an electrical control panel. We will look into non-electrical components first because there are only usually two of them and they are straightforward to understand. It is important to look at both to get a complete picture of how the system works. The components of an electrical control panel can be classified into two main categories: electrical and non-electrical. This article will discuss electrical control panels in depth by looking into each component and what they contribute to the system. ![]() Usually one SCADA system is monitoring several pieces of equipment that each have one or more control panels.ĭeveloping a more comprehensive understanding of electrical control panels can benefit anyone working in or managing industrial, especially manufacturing, enterprises. SCADA is a monitoring system on top of a control system. Control panels generally have either PLC’s or industrial computers that can have features like Supervisory control and data acquisition (SCADA). ![]() These machines have an array of applications, from assembly and manufacturing to food production and traffic lights.Įlectrical control panel designs can vary based on the application. This means anyone reading this has encountered a product made with the help of a control panel.Īn electrical control panel is a system of several electrical devices that control and monitor the mechanical functions of industrial machinery. If a product came from an automated assembly line, then an electrical control panel was involved in controlling it. ![]()
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