The terminal block is a kind of accessory product used to realize the electrical connection, which is divided into the category of the connector in the industry. As the degree of industrial automation becomes higher and the requirements for industrial control become stricter and more precise, the amount of wiring terminals is gradually increasing. With the development of the electronics industry, the scope of use of terminal blocks is increasing, and there are more and more types. In addition to PCB terminals, the most widely used terminals include hardware terminals, nut terminals, spring terminals, and so on.

History development:

In 1928, Phoenix Contact invented the world's first modular terminal block. This is the prototype of modern terminals, and it is also the first invention patent that Phoenix Contact applied for and obtained. Since then, Phoenix Contact has been passionate about innovation, committed to the development of various connection technologies, and formed a complete electrical interface technology system, many of which have become industry application standards.

definition:

The terminal block is used to facilitate the connection of wires. It is actually a piece of metal-enclosed in insulating plastic. There are holes at both ends for the wire to be inserted. There are screws for fastening or loosening, such as two wires. Sometimes Need to connect, sometimes need to disconnect, then you can use the terminal to connect them, and can be disconnected at any time, without having to weld or twist them together, it is very convenient and quick. And it is suitable for a large number of wire interconnections. In the electric power industry, there are special terminal blocks and terminal boxes, all of which are connected terminals, single-layer, double-layer, current, voltage, ordinary, breakable, and so on. A certain crimping area is to ensure reliable contact and to ensure that sufficient current can pass.


classification;

Terminal series, pluggable terminal series, transformer terminal, building wiring terminal, fence terminal series, spring terminal series, track terminal series, through-wall terminal series, photoelectric coupling terminal series, 110 terminal, 205 terminal, 250 terminal, 187 terminal, OD2.2 ring terminal, 2.5 ring terminal, 3.2 ring terminal, 4.2 ring terminal, 2 ring terminal, 6.4 ring terminal, 8.4 ring terminal, 11 ring terminal, 13 ring terminal flag series terminal and sheath series, all kinds of ring terminal, tube terminal, terminal block, copper strip iron strip (2-03, 4-03, 4-04, 6-03, 6-04), etc.

Pluggable

It consists of two parts plug-in connection, one part presses the wire tightly, and then plugs into the other part, this part is soldered to the PCB board. The mechanical principle of this connection bottom and this anti-vibration design ensure the long-term airtight connection of the product and the reliability of the finished product. Mounting ears can be added at both ends of the socket. The mounting ears can protect the tabs to a large extent and prevent the tabs from being arranged poorly. At the same time, this socket design can ensure that the socket can be correctly inserted into the mother body. The socket can also have an assembly buckle and lock buckle. The assembly buckle can be more firmly fixed to the PCB board, and the locking buckle can lock the mother body and the socket after the installation is completed. A variety of socket designs can be matched with different matrix insertion methods, such as horizontal, vertical, or inclined to the printed circuit board, etc., and different methods can be selected according to customer requirements. You can choose either metric wire gauge or standard wire gauge, which is the most popular terminal type on the market.

Fence type:

It is able to realize the safe, reliable, and effective connection, especially in the use environment of high current and high voltage, which is widely used.

Spring type:

It is a new type of terminal using spring device, which has been widely used in the world's electrical and electronic engineering industries: lighting, elevator lifting control, instrumentation, power supply, chemistry, and automobile power, etc.

Rail installation:

It adopts reliable threaded connection technology, electronic fuse technology, and the latest electrical connection technology, and is widely used in power electronics, communications, electrical control, and power supply fields.

Orbital:

The use of a crimping and unique thread self-locking design makes the wiring connection reliable and safe. The appearance design of this series of terminal blocks is beautiful and generous, and it can be equipped with a variety of accessories, such as short-circuit strips, identification strips, baffles, etc.

Through-the-wall

The screw connection technology is adopted, the insulating material is PA66 (flame retardant grade: UL94, V-0), and the connector is made of high-quality and highly conductive metal materials.

H-type through-wall terminal blocks can be installed side by side on panels of 1mm to 10mm thickness, and can automatically compensate and adjust the distance of panel thickness to form a terminal block with any number of poles, and can use isolation plates to increase air gap and creepage distance. The wall-through terminal can be firmly installed in the rectangular reserved hole on the panel without any tools, and the installation is extremely convenient.

H-type wall-through terminal blocks are widely used in some occasions that require wall-through solutions: power supplies, filters, electrical control cabinets, and other electronic equipment. The insulation performance is good, the protection level is high, the user only needs to work directly after the external wiring, eliminating many unnecessary wiring steps. The insulating material of the UK series terminal blocks is modified nylon (PA66), which can be connected to electrical connection products with a 4mm2 conductor voltage of 800V and a current of 41A.


WMSTB:

The insulating material of the PCB terminal block is made of modified imported nylon (PA66), which has good electrical and mechanical properties, whether you need hardware and the hardwire connection, hardwire and multi-strand wire, or multi-strand wire and multi-strand wire. Stranded wire connection

Features:

The existing rail-type terminal block and frame-type screw connection technology are used, and a circuit composed of electronic components is added to realize the transmission coupling of the photoelectric process.

The core of automatic control is that the control unit must be reliably isolated from the sensors and actuators to avoid interference. The Sanmenwan WUKG2 optical isolation terminal can perform this function well and ensure that the field signal and the electronic control device require low levels. Voltage matching can also be used as the interface component between process control peripheral equipment and control, signal, and regulator device, and is suitable for different voltage and power ranges.

The optical isolation terminal has the advantages of low signal loss at the control end, high switching frequency, no mechanical contact jitter, no wear switching, high insulation voltage, no fear of vibration, unaffected by position, and long life. Therefore, it is widely used in the field of automatic control.

In summary, this article has explained the terminal blocks for everyone. I believe everyone will have a deeper and deeper understanding of the terminal blocks. I hope this article can be of greater reference value for readers. If you want to learn more about connectors, you can browse other articles on our blog, or continue to follow our updates