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Terminal blocks are integral parts of multiple fields, such as electrical engineering, machine building, power engineering and instrumentation. These blocks are also referred to as terminal boards or strips, barrier strips, tag strips or plug strips. They allow single-sided or double-sided connections to be made and broken without trouble. Often, they simply have to be screwed in so that no tools are needed.

Applications

Terminal blocks can be used in all kinds of installations, such as electrical wiring, RF transmission and data control systems. In addition to the purely electrical application field, these components are ideal for both residential and industrial applications. For example, building automation projects require terminals for both low and high power connections, such as relays, the power and control bus, and alarm systems.

Furthermore, these blocks are used extensively in machine building and automation systems. If a robotic arm is to be designed, for example, then it needs to be connected to the automation system. Similarly, if a machine tool requires a connection to the production line, then it would likely use a terminal block. Additionally, these blocks can be used in measurement and control equipment, for instance, in the automotive industry where they can be made to measure the temperature of an engine.

Working Principle

Terminal blocks generally consist of a base element, plug-in part and terminal. To connect two sections of wire together, they are placed into the base element. This can be a screw-connected terminal block, with a hole at the bottom for a screw fitting, or it can be a spring-type block where the wire is simply pushed into place. The plug-in part then connects the terminal to the base element and allows the whole terminal block assembly to be plugged in and out very easily.

The terminal is then attached to the base element. It is usually made from copper and has a hole in the middle for connecting the cable to the terminal block itself. It also has external connections for inserting a screwdriver and unscrewing the connection. When the terminal is connected, this allows a current of electricity to flow and the terminal block then controls and regulates the flow of current.

Conclusion

Terminal blocks are used in a variety of different applications and they play a crucial role in the interconnections of many different systems. Their ability to make strong, secure connections in a wide range of conditions, and their ease of use, make them a key component in many industries. They allow for simplified installation and maintenance of electrical connection and, as such, are likely to remain a bedrock element of production and assembly systems for the foreseeable future.

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