German Kraus & Naimer plugs, Kraus & Naimer models, Kraus & Naimer prices

Kraus & Naimer plugs are an industrial data bus that has developed rapidly in recent years. They primarily address digital communication between field devices such as intelligent instruments, controllers, and actuators on the industrial site, as well as information transfer between these field control devices and higher-level control systems. Due to prominent advantages such as simplicity, reliability, and cost-effectiveness, field buses have received significant attention from many standards organizations and computer manufacturers. It is an industrial data bus and serves as the underlying data communication network in the automation field. The emergence of field buses plays a very important role in industrial development and has a significant impact on national economic growth. Field buses are mainly applied in fields such as petroleum, chemical industry, electric power, pharmaceuticals, metallurgy, processing and manufacturing, transportation, national defense, aerospace, agriculture, and buildings.

Kraus & Naimer plug introduction

The field bus is an open interconnected network that can interconnect with networks at the same layer or different layers, and can also enable shared access to network databases. The field bus embodies characteristics such as distribution, openness, interconnectivity, and high reliability, which are precisely the shortcomings of DCS systems. DCS typically transmits signals one-to-one; the analog signals used have low precision and are susceptible to interference. Operators in the control room often find it difficult to adjust parameters and predict faults with analog instruments, leaving them in an 'out-of-control' state. Many instrument manufacturers define their own standards, resulting in poor interchangeability. Instrument functions are relatively singular and difficult to meet modern requirements, and almost all control functions are located in the control station. FCS, in contrast, adopts one-to-many bidirectional signal transmission. The digital signals used offer high precision and strong reliability, keeping equipment under remote monitoring and control by operators at all times. Users can freely select and interconnect devices from different brands and types as needed. Intelligent instruments possess rich functions such as communication, control, and computation, and control functions are distributed among various intelligent instruments. Thus, we can see the tremendous progress of FCS compared to DCS. It is precisely due to the above characteristics of FCS that it offers significant advantages in design, installation, commissioning, and normal production: First, since intelligent devices at the front end can perform relatively complex tasks, separate controllers and computing units are no longer required, saving on hardware investment and footprint; FCS wiring is relatively simple, and a single transmission line can connect multiple devices, greatly reducing installation costs; since field control devices often have self-diagnostic capabilities and can send fault information to the control room, maintenance workload is reduced; meanwhile, users have a high degree of autonomy in system integration and can flexibly choose suitable products from manufacturers; the overall system reliability and accuracy are also significantly improved. All this helps users reduce installation, usage, and maintenance costs, ultimately achieving the goal of increasing profits.

Kraus & Naimer plug material

1) The material of the female or male terminal shall be copper alloy, or plated copper alloy, nickel, or nickel alloy. [Exception: If the structure of the electrical appliance or device permits, the female or male terminal may be plated sheet, or non-plated but corrosion-resistant alloy. 2) If formed female terminals or trimmed male terminals appear in the form of terminal strips, when the terminal strip is continuously fed into the processing tool, the terminals are crimped and separated from the terminal strip, then in this case, the edge where the terminal connects to the terminal strip does not need to be plated. The standard terminals used in temperature and thermal cycling tests shall be tin-plated sheet or corrosion-resistant steel, according to the Rockwell 30T hardness scale, with a hardness of Rockwell hardness 68 ± 5. Exception: If the female terminal is only suitable for connecting to copper alloy male terminals, then C26000 copper alloy standard terminals shall be used for testing. 2.3 According to the Rockwell 30T hardness scale, the hardness of standard terminals made of brass is 62 ± 7.

Kraus & Naimer 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. Analysis indicates that burrs or dirt in the threads of individual mounting holes cause jamming. This is particularly common in the last few mounting holes of a plug/socket already assembled by the user; upon discovering this defect, the crimped wires in other already installed holes must be removed one by one, and the plug/socket replaced. In addition, improper matching of wire diameter and crimp hole size, or errors in the crimping process, can lead to insecure crimped connections. Therefore, manufacturers must perform a pass-through test on all mounting holes of sample plugs (sockets) before shipment. This involves using loading/unloading tools to simulate inserting wires crimped with pins or sockets to check if they lock properly. According to product technical specifications, pull-out force checks are performed on each crimped wire. Without reliable terminal blocks, there is no reliable system engineering. Failure and reliability are two aspects of a contradictory entity that correspond to and interact with each other. Through reliability screening of terminal blocks, various failure modes and mechanisms are identified, yielding extensive lessons learned and eliminating hidden dangers. This provides a scientific basis for improving design, processes, inspection, and usage, and is also an important basis for revising and establishing technical conditions for terminal blocks. The ultimate goal of failure analysis is to find measures to prevent failure and achieve the transformation from failure to reliability.

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