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Terminal Blocks - Wire to Board

Terminal blocks (or terminal boards or strips) are a type of electrical connection technology where two or more wires can be connected to a single connection point. Terminal blocks are used for terminating and connecting electrical conductors in a wide variety of applications, from the home or light industrial installation to complex industrial process control equipment.

The wiring applications for terminal blocks often require wire-to-board power and signal connections. Here, power and signals transmit to and from the board, providing a secure and reliable termination point.

One application field of terminal blocks is in factory automation and industrial control. The reliable power and signal connection techniques provided by terminal blocks are used in control boxes, junction boxes, enclosures, and switch panels. They provide a secure connection in the form of screw type, spring cage, and pluggable connections.

Within factory automation, terminal blocks are used on a wide range of industrial equipment, including robots, CNC systems, control stations, and motors.

The working principle of terminal blocks is typically based on the insertion of bare wires into the terminal block, facilitating connection between two or more conductors. The terminal blocks may be configured to accept rigid or stranded conductors with different cross sections. Electrical contact is made inside the terminal block as the contact pressure of the screw connection secures the electrical contact.

The simplest method of connecting to a terminal block is to twist two cables together and insert them into a two-pin terminal block. This type of direct connection is used for electrical junction boxes, industrial automation systems, and distribution systems. For more complex connections, such as between embedded control units and motors, there are special high-density terminal blocks with multiple pins. These can connect up to 50 conductors safely and securely.

Terminal blocks are designed with a variety of features to suit different applications. Insulation displacement connection (IDC) blocks are designed for easy connection of multiple wires with no need for stripping. The IDC technology reduces connection time and labor costs without compromising the quality of the connection. PCB terminal blocks are designed for quick and easy mounting onto printed circuit boards, whilst spring-clamp terminal blocks provide a cost-effective alternative to traditional screw-type terminals. Pluggable terminal blocks provide the flexibility to easily change wires and connectors in the field.

Terminal blocks provide a secure and reliable electrical connection for a wide variety of applications and industries. The wide range of connection techniques and sizing makes them suitable for high-density power and signal transmission, providing cost-effective solutions for industrial automation and control.

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