German DOLD plug DOLD model DOLD price

DOLD plugs are accessory products used to achieve electrical connections and are classified industrially as connectors. As the level of industrial automation increases and industrial control requirements become stricter and more precise, the usage of terminal blocks has gradually risen. With the development of the electronics industry, the scope of use for terminal blocks has expanded, and their varieties have increased. Besides PCB board terminals, the most widely used types include hardware terminals, nut terminals, spring terminals, and more. Terminal blocks are applied to facilitate wire connections; they are essentially metal strips enclosed in insulating plastic, with holes at both ends for inserting wires and screws for tightening or loosening. For example, two wires may sometimes need to be connected and other times disconnected; terminals can be used to connect them and allow for disconnection at any time without the need for welding or twisting together, which is very convenient and fast. They are also suitable for interconnecting large numbers of wires. In the power industry, there are dedicated terminal strips and terminal boxes filled with terminal blocks, including single-layer, double-layer, current, voltage, standard, and disconnectable types. A certain crimping area is required to ensure reliable contact and sufficient current carrying capacity.

DOLD plug applications

Mainly applied in industries such as lighting, communications, and security. Plug-in terminals have the widest range of application industries, such as variable frequency drives, explosion-proof equipment, CNC panels, access control controllers, sensors, PLC, instruments and meters, power supplies, servo drives. The common requirements for plug-in terminals in these application industries are: smooth insertion and extraction force, low contact resistance, and the ability to meet certain life and fatigue standards, resulting in higher requirements for hardware spring materials. This requires product designers to have considerable experience in structure and material selection. Barrier terminals are mainly applied in: power supplies, relays (especially double-layer terminals), inverters, the elevator industry (less common), and air conditioning. The requirements for this series of terminals include high torque requirements for screws during wire crimping, the distance when the screw is retracted to its highest position must be greater than the maximum wire crimping range, long-position terminals must not warp or deform, and screws must have high corrosion resistance.

DOLD plug features

Utilizing existing rail-mounted terminal block frame screw connection technology and adding circuits composed of electronic components achieves transmission coupling of the optoelectronic process. The core of automatic control is that the control unit must be reliably isolated from various sensors and actuators to avoid interference. Sanmenwan WUKG2 opto-isolated terminals can effectively perform this function, ensuring that field signals match the low voltage required by electronic control devices. They can also serve as interface elements between peripheral equipment for process control and control, signal, and regulator devices, and are suitable for different voltage and power ranges. Opto-isolated terminals have advantages such as low signal loss at the control end, high switching frequency, no mechanical contact bounce, wear-free switching, high insulation voltage, resistance to vibration, independence from position, and long service life, thus they are widely used in the field of automatic control.

DOLD plug applications

Each type of bus has its own application areas. For example, FF and PROFIBUS-PA are suitable for process control in industries such as petroleum, chemical, pharmaceutical, and metallurgy; LonWorks, PROFIBUS-FMS, and DevieceNet are suitable for buildings, transportation, agriculture, and other fields; DeviceNet and PROFIBUS-DP are suitable for the manufacturing industry. However, these divisions are not absolute, as each fieldbus strives to expand its application areas and penetrate each other's markets. Most fieldbuses are backed by one or several large multinational corporations and have established corresponding international organizations to expand their influence and gain more market share. For example, PROFIBUS is mainly supported by Siemens company and has established the PROFIBUS International User Organization. WorldFIP is mainly backed by Alstom company and has established the WorldFIP International User Organization.

Weidou Intelligent Technology specializes in selling German DOLD connectors, DOLD connectors, DOLD interface modules, DOLD terminal blocks, DOLD bus interfaces, DOLD bus modules, DOLD communication modules, DOLD fieldbus, DOLD plug interfaces, DOLD communication interfaces, DOLD adapters, DOLD output modules, DOLD distributor converters, DOLD plug bus, DOLD expansion modules, DOLD original German imports. Welcome customers to inquire and order.