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Terminal blocks - accessories, also known as wiring terminal strips, are the essential components in a wide range of electronic wiring systems. They are broadly used in automation, instrumentation, communications, computer, medical device and consumer product applications.

The name "terminal block" is derived from the "terminal," which means the connection point for the wiring link, and the "block," which refers to the collection of terminals linked together in a single mountable form. Terminal blocks can also be used to connect different voltage lines in applications where the connection cannot be made directly, so that an external power transformer can be incorporated.

Terminal blocks are available in a number of types and styles, designed to meet the needs of different wiring and assembly applications. Depending on their design and construction, they can be used to support and connect a range of wire diameters, cables, conductors, and other wiring devices. Common types include: terminal blocks with screw-type connectors, spring-type terminal blocks, clip-type terminal blocks, and pluggable terminal blocks.

Terminal blocks provide a convenient and efficient means to connect wires and cables. They offer quick installation, high density wiring, and can accommodate a variety of circuit protection and insulation requirements. They are also robust and resistant to dust, dirt, and other pollutants, and can provide years of reliable performance.

The most basic design of a terminal block consists of a set of two electrically isolated electrical conductors, or "terminals." The terminals are embedded inside a box-like casing, typically an insulating material such as plastic. To connect the terminals, fasteners such as screws or plugs are used, and these can either be soldered or connected together using a tool such as a crimping tool. Mounting provisions for the block are usually provided, either on the front or the back of the block. The mounting provisions allow the terminal block to be securely attached to another piece of material, such as a panel or an enclosure.

To ensure proper functionality, the terminals must be securely connected to the appropriate wires or cables. The types of terminal blocks available on the market vary depending on the type of connection being used, as well as the intended application. For example, some terminal blocks are designed to support low-voltage systems, while others are designed for high-voltage systems.

Different types of terminals are also available. Popular terminal types include screw terminals, soldered terminals, spring clamp terminals, and cross-connected terminals. Additionally, some terminal blocks include features such as jumpers, or pre-made connecting sections, to enable wiring connections between terminals on the same block.

Terminal blocks also often include additional features that enable easier wiring and installation. These features may include LEDs, status indicators, fuses, and circuit protection. Depending on the type of circuit protection used, the terminal blocks may also include other components such as varistors and thermal circuit breakers.

Terminal blocks can be used for various types of wiring applications including power, control, and data transfer. For power applications, they are used to connect power sources to receptacles, terminals, and other components of the electrical system. On the other hand, control applications involve controlling signals between electrical devices, and data transfer applications involve data transmission between microchips, sensors, and other devices.

Terminal blocks are often used for multiple outputs in a single wiring system. This is best accomplished by daisy chaining multiple terminal blocks together, so that multiple components may be wired in parallel to the same power source. This allows for the same device to be used on multiple outputs without the need for additional wiring.

Overall, terminal blocks are a versatile and reliable way to support several connection tasks in an electrical wiring system. They allow for quick and efficient installation, and their robust build ensures years of reliable performance. Additionally, these blocks can be easily customized to meet the needs of a wide range of applications.

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