Nowadays, more and more engineers understand that industrial Ethernet switches are different from civilian Ethernet switches, and in most respects, they understand the differences, but detailed and systematic materials have not been seen. The following only summarizes the differences between some industrial Ethernet switches and civilian Ethernet switches that have been summarized so far, for reference only.
1. Industrial Ethernet switches Compared with residential Ethernet switches, industrial Ethernet switch products can meet the needs of industrial sites in terms of design and selection of components.
2. Industrial Ethernet switches include mechanical environment adaptability (such as vibration resistance, impact resistance), climatic environment adaptability (operating temperature requirements are -20 ~ +85 ° C, at least -10 ~ +70 ° C, and corrosion resistance, Dustproof, waterproof, electromagnetic environment adaptability or electromagnetic compatibility EMC shall comply with EN 50081-2, EN 50082-2, EN 50082-3, EN 50082-4, FCC, GB/T17626, IEC61000 and other standards.
3. Industrial Ethernet switch products should adapt to the harsh environment of industrial control sites. The network equipment used in the industrial field must pass the IEC61000-4-5, GB/T17626.5 and other standards for surge testing, and the power frequency magnetic field immunity test is passed through IEC61000-4-8, GB/T17626.8 and other standards. IEC61000-4-9, GB/T17626.9 and other standards for pulse magnetic field immunity test, voltage change immunity test according to standard IEC61000-4-11, GB/T17626.11.
4. Industrial Ethernet switches are mostly wide voltage design, working voltages of 18VDC ~ 36 VDC, 220VA, 220VDC, 110VDC and so on.
5. The industrial Ethernet switch power supply is generally designed for redundant dual power supply, and the civilian Ethernet switch is a single power supply.
6. Industrial Ethernet switch installation methods DIN rail, rack, etc. Civil Ethernet switch installation method desktop, rack.
7. Industrial Ethernet switch operating temperature is wide (working temperature is -20 ~ +85 ° C, at least -10 ~ +70 ° C), civil Ethernet switch operating temperature range is narrow.
8. Industrial Ethernet switch cooling mode Fanless case heat dissipation, civil Ethernet switch fan cooling.
9. Electromagnetic compatibility EN50081-2 (EMC, industrial) EN50081-2 (EMC, office) EN50082-2 (EMC, industrial) EN50082-2 (EMC, office). Industrial Ethernet switches meet EN50082-2 (EMC, Industrial).
10. Industrial Ethernet switch shell material alloy shell, high strength plastic shell, low strength.
11. Industrial Ethernet switches are dust-proof and fully enclosed, and have good dustproofness.
12. Industrial Ethernet switch link failure recovery time <300ms. Civil Ethernet switch for more than 30 seconds.
From the above indicators, it is difficult for civil switches to meet the needs of industrial environment. Therefore, in more and more industrial automation fields, many users have ensured industrial safety and chose to use industrial Ethernet switches.
The plug of the aerospace Cable Assembly is divided into male and female. The specific identification method is as follows:
1. One side of the plug (the protruding Connector) is a male head, and one side of the jack (the concave connector) is a female head.
2. Distinguish from the appearance and shape, the pointed part of the head is generally a male terminal, and the head with a round hole is generally a female terminal.
3. It can be distinguished by size: generally the larger head is the female head, and the smaller head is the male head.
How to wire the aerospace cable assembly plug?
1. In general, there will be a semi-circular splint at the back of the conventional aviation plug to fix the lead, and there will also be two small turnbuckles on it. You can use a tool to remove the nut and then separate the deck.
2. After removing the aviation plug splint, find a thin nail as a tool and put it into the jack to fix it, and rotate the aviation plug in the opposite direction on one side, so that the core and wire of the aviation plug can be naturally pulled out from the front.
What are the test contents for aerospace cable assembly?
When conducting aviation wiring harness testing, we mainly conduct the following wiring harness tests:
1. On-off test
2. Withstand voltage test
3. Insulation resistance test
4. Two-wire/four-wire resistance test
5. Instantaneous interruption test
Radiation-resistant film-wrapped insulated wire for aerospace: suitable for aerospace vehicles. The wire is irradiable and can be used in an environment where radiation such as current market rays exists.
Tinned copper core PFEP insulated wire and cable: It is mainly used in aircrafts, aircrafts or installation wires used in harsh environments such as high temperature and strong corrosion. It has good high temperature and corrosion resistance characteristics.
Aeronautical radiation-resistant low-temperature flexible wire: It is wrapped with special composite film for insulation, woven with synthetic fibers, and treated with special paint. The wire can still maintain good flexibility and electrical insulation performance after being tested at -196 ℃ dynamic bending, high and low temperature impact, and irradiation.
We cooperate with all leading cable and connector manufacturers, and have a wide range of professional equipment, allowing us to provide quality wiring harness and cable assembly, quick delivery time and favorable prices!
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