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Terminal blocks are a type of electrical connector consisting of a row of individual connections mounted on a strip of insulating material and housed in an insulated enclosure. The main purpose of a terminal block is to terminate the power and signals from the wiring that makes up the system and to provide a means of attaching external electrical components to the system.Terminal blocks are available in a variety of styles, sizes, and materials. The most common type of terminal block is the “spring” type, which consists of a terminal block housing, a spring clip, and electrical contact points. Other types, such as “barrier” terminal blocks, are also available.Terminal blocks are usually sold in pairs or kits and come with an assortment of accessories. One common accessory is a marker strip, which is a type of labeling strip used to label the terminals on the terminal block. Marker strips are available in various sizes and types and can be labeled with text, numbers, or symbols.The application field for marker strips consists of oil and gas, medical, water and waste water, power, entertainment, industrial automation, process control, telecom and communications, security, aerospace, and others. Marker strips are mostly used in electrical installations and automation control systems. The working principle of a marker strip is quite simple: it identifies a particular connection point in the system, which prevents confusion when working on the system. This is especially important in systems that have a large number of terminals. The marker strip also indicates the type of signal and/or power that is associated with the particular connection. Marker strips are also used in industrial automation control systems to identify signal and control lines. They are also used to identify alarm and fault conditions in the system. Marker strips are designed not only to provide visibility and identification of individual wires, but also to protect the wires from any damage that could be caused by the environment or normal wear and tear. This protection is provided by the insulation of the marker strip and its ability to keep the wires intact.Marker strips are typically printed on, using either silk-screening or thermal transfer printing. They can also be marked directly onto the terminal block using a laser engraving machine. The printing technique used depends on the material that the marker strip is made from and the nature of the environment in which it will be used.

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