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Terminal Blocks - Barrier Blocks

Terminal blocks, also known as barrier blocks, are an electrical interface often used to connect field wiring at the junction of an electronic system.

Application Field

Terminal blocks are generally independent and interconnected blocks, which can connect various field signal lines into the cabinet-level control system. Their characteristic is fast, simple and reliable plug connection.

Terminal blocks are widely used in measurement, communication, control, instrumentation, power and automation systems and other industrial sectors for quick wiring of equipment. For example, in a remote monitoring system of photovoltaic equipment, it can improve the safety of personnel by using a terminal block for connection instead of direct wiring.

Working Principle

Terminal blocks typically consist of a plastic base or bottom section with a metal, spring-loaded connector, or spring clamp. During normal operation, the wires are inserted into the terminal block, and the clamp is closed to keep the wires firmly in place. The spring-loaded clamps provide automatic compensation for variations in wire thickness, ensuring that the contact between the wire and the terminal block is consistently secure and uninterrupted.

The terminal blocks come in different shapes and sizes, depending on the application. The most common terminal blocks use a screw closure, which helps ensure that the wires do not come loose due to external vibration or shock. The screw can either be manually inserted and tightened, or it can be tightened via a power/pressure knob.

Conclusion

Terminal blocks, also known as barrier blocks, are an important electrical interface often used to quickly connect field wiring to an electronic system. This provides safety for personnel and helps to guarantee secure and reliable connection in any application.