1.Definition of circular connector.
Circular connector, also known as circular aviation plug, circular aviation plug or circular interconnector, is a cylindrical multi pin electronic connector with a circular plug surface, belonging to Class 5 of the interconnection classification, used for interconnection between devices. Circular connectors contain contacts for transmitting data and power, typically including low-frequency ring connectors, RF coaxial connectors, and audio connectors. The cylindrical structure of circular connectors has natural robustness and higher strength than any other shape. A plug has two parts: a socket and a plug design. One common accessory is a connector product housing, a locking sleeve, a spring, a pin, a contact pin, a wiring terminal, a waterproof gasket, a dust cover, etc. The shell material of circular connectors is generally selected from zinc alloy or PBT engineering plastic materials to ensure the overall robustness of the connector.
2.The application of circular connectors.
The cylindrical structure of circular connectors has natural robustness and a higher strength to weight ratio than any other shape. Easy to seal, easy to insert and remove, simple and sturdy locking and adjusting mechanism. Therefore, in situations where multiple connectors are used to achieve interconnection between components and cables, as well as between cables, circular connectors are the first choice.
Widely used in sensors, actuators, encoders, motors, industrial grating light curtains, factory automation process control, equipment batteries, semiconductors, packaging label printing equipment, fieldbus, industrial instruments and equipment, ship electronics NMEA 2000, rail transit, EMS circuit board components, LED outdoor display screens, outdoor LED lighting, etc.
1.The basic structure of a circular connector.
1. Contact: It is the core component that completes the electrical connection function. Generally, a contact pair is composed of a positive contact piece and a negative contact piece, and electrical connection is completed through the insertion of the negative and positive contact pieces.
2. Attachment: divided into structural attachments and installation attachments. Structural attachments such as locating pins, retaining rings, connecting rings, sealing rings, guide pins, locating keys, cable clamps, sealing gaskets, etc. Install accessories such as spring coils, screws, screws, nuts, etc.
3. Insulator: The insulation mounting plate, also commonly known as the base or insulator, is used to arrange the contacts in the required position and spacing, and ensure the insulation performance between the contacts and between the contacts and the housing.
4. Shell: also known as the outer casing of a connector, it provides mechanical protection for the internal insulation mounting board and pins, and provides alignment for plug and socket insertion, thereby fixing the connector to the device.
3. Factors affecting the lifespan of circular connectors
1. Humidity: When the relative humidity in the environment is relatively high, the metal structural components on the connector will be corroded, resulting in a decrease in insulation performance. Therefore, if circular connectors can be used in areas with continuous rain or water in the enterprise, their service life will be greatly shortened.
2. Temperature: Temperature can also affect the lifespan of connectors. The temperature in different seasons, especially in cold winter and summer, can be very high or low, especially in hot weather. When a circular connector is connected to a power source, the current itself generates heat. In addition, high temperatures can easily cause the temperature of the connector's socket to continuously rise, making it even more prone to causing the connector to burn out.
3. Salt spray: According to research, when the ambient temperature is 35 ℃ and the concentration of salt solution in the environment is 3%, it is easy to cause metal corrosion. Therefore, when circular connectors are used in this environment, their performance will decrease and their lifespan will be shortened.
4.The advantages and disadvantages of circular connectors.
【Advantages 】 Circular connectors are very suitable for applications that require stronger terminals. Their cylindrical shape makes them particularly resistant to mechanical engineering turbulence, impact, and damage. The contact resistance of circular connectors should be low and stable. The contact resistance ranges from a few milliohms to tens of ohms. The insulation resistance measures the insulation performance between the contacts of a circular electrical connector and between the contacts and the housing structure, ranging in size from several hundred megaohms to several thousand megaohms. Dielectric strength or withstand voltage, also known as dielectric withstand voltage, refers to the circular electrical connector characteristics of the resistance between contacts or between contacts and the housing relative to the rated test voltage. Electromagnetic interference leakage attenuation is used to evaluate the shielding effect of circular electronic connectors. The frequency range typically measured is between 100mhz and 10ghz.
[Disadvantages] The circular surface area limits the arrangement of pins and sockets on the surface of the circular connector; Connectors with rectangular faces can install more contacts with larger and more uniform spacing on a smaller surface area.
5.How to choose a circular connector.
Circular connector bayonet types: When selecting circular connectors, it is important to choose appropriate and matching bayonet types, mainly including 1/4 quick bayonet connection, plug-in connection, latch connection, quick plug-in connection, threaded connection, zipper connection, etc;
Circular connector wiring methods: crimping, welding, nut locking, cast cable, etc; Circular aviation plug with right angle and bent angle types; Needle circular aviation insertion and pinhole circular aviation insertion;
Whether it has shielding performance: Circular aviation plugs used in different environments have different shielding requirements. Some connector manufacturers that provide personalized customization services will provide industrial connectors with different shielding effects according to customer needs, such as 360 ° shielded circular connectors.
Hole position and model: When selecting a circular connector, in addition to considering conventional connector standards, it is also necessary to check whether the hole position diagram of the connector meets the standards.
6.Precautions for use
In order to ensure the correct operation of circular connectors, it is necessary to comprehensively master and understand their operating steps. Some circular connectors do not have reverse operation errors. To ensure accurate positioning and correct connection, the model and specifications can also be matched. In order to avoid electrical contact caused by aviation plugs damaging the environment, attention should be paid to the inevitable insertion of the wrong pin into the power socket.
Also, it is important to connect the aviation plug in a timely manner, especially in areas that are difficult to inspect. It is also necessary to make detailed requirements in the corresponding operating procedures and conduct inspections based on the scope. When connecting the end of the aviation plug, the end connection and inspection should be strictly carried out according to the corresponding end connection standards or regulations, and the end connection should be made according to the matching number of connection points.
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