German EXXOtest plug EXXOtest model EXXOtest price

EXXOtest plug terminal blocks, as a type of connector, are important components in the electrical industry, playing an irreplaceable and significant role. Since engineering technicians start troubleshooting by checking interfaces, i.e., terminals, the design of terminal blocks is particularly important. Terminal blocks can be classified into: European-style terminal block series, pluggable terminal block series, transformer terminal blocks, building wiring terminals, barrier-type terminal blocks, spring-type terminal blocks, DIN rail terminal blocks, wall-through terminal blocks, and optocoupler terminals. The plastic insulation materials and conductive parts of terminal blocks directly affect their quality, determining the insulation performance and conductivity of the terminals respectively.

EXXOtest plug applications

Mainly applied in lighting, communications, security, and other industries. Pluggable terminals have the widest range of applications, such as in variable frequency drives, explosion-proof equipment, CNC panels, access control controllers, sensors, PLC, instruments, power supplies, servo drives. The common requirements for pluggable terminals in these industries are: smooth insertion and extraction force, low contact resistance, and sufficient service life and fatigue resistance, which imposes high requirements on the metal spring clip materials. This requires product designers to have certain experience in structure and material selection. Barrier-type terminals are mainly applied in: power supplies, relays (especially double-deck terminals), variable frequency drives, elevator industry (less common), and air conditioners. The requirements for this series of terminals include high torque requirements for screws during wire crimping, the distance when the screw is retracted to the highest position must be greater than the maximum wire clamping range, long-position terminals must not warp or deform, and screws must have high corrosion resistance.

EXXOtest plug features

Field control devices feature communication capabilities, facilitating the construction of the plant's lower-level control network. The openness and consistency of communication standards ensure system openness and interoperability between devices. Standardization of function blocks and structures enables interchangeability among devices with identical functions. Decentralizing control functions to the field level provides a highly distributed control system architecture. Fieldbus technology integrates automation devices and systems into information networks, expanding their application scope; multiple control devices can be connected on a single twisted-pair cable, reducing installation costs; lowering maintenance expenses; enhancing system reliability; and providing users with greater flexibility in system integration.

EXXOtest plug troubleshooting

During electrical assembly, it is often found that individual core crimped wires are not fully inserted, or cannot be locked after insertion, resulting in unreliable contact. The analysis shows that burrs or dirt in the threaded holes of individual installation ports cause jamming. Especially when using factories that have already electrically assembled the last few installation holes of a plug socket, discovering this defect requires removing all previously crimped wires from other holes one by one and replacing the plug socket. Additionally, improper matching of wire diameter and crimping hole size, or errors in the crimping process, can lead to loose crimping ends. Therefore, manufacturers must perform through-testing on all installation holes of sample plugs (sockets) before shipment, using loading and unloading tools to simulate inserting crimped pins or sockets to check if they can be locked. According to product technical specifications, pull-out force tests are conducted on each crimped wire. Without reliable terminal blocks, there can be no reliable system engineering. Failure and reliability are two aspects of a contradictory entity that are both opposite and interconnected. By identifying various failure modes and mechanisms through terminal block reliability screening, extensive lessons learned and hazard elimination can be derived, providing scientific basis for improving design, processes, inspection, and usage, and serving as an important basis for revising and establishing terminal block technical conditions. The ultimate goal of failure analysis is to find measures to prevent failures and achieve the transformation from failure to reliability.

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