grounding wristband

because 485 communication using differential mode communication principle, twisted pair of anti-interference is the best. It is extremely wrong not to use twisted-pair wires.485 bus must be hand-held hand-type bus structure, resolutely eliminate star-type connection and fork connection.Equipment power supply of AC and chassis must be real grounding, and good grounding.There are many places on the surface of the triangle plug, in fact, there is no

convenient for use. ② Single-phase power outlet with protective grounding should be selected for power sockets in the work zone, and the protection grounding should be strictly separated from the zero line. (2) Inter-Telecom A telecommunications room, also known as a junction or wiring room, refers to a network device HUB or switch (SW) used to install the FD and the computer system floor for the Integrate

silicone three-part, and some buttons between the key cap assembly and the bracket with a light-shielding paper to prevent light transmission between the keys. Stent material according to the key thickness, can be used PC or ABS injection molding, thickness in 0.8-2.0mm; You can also use PC sheet directly blanking, thickness of 0.5, 0.6 or 0.7mm; When the key thickness is not enough, the bracket material with 0.15mm thick stainless steel sheet, but considering the ESD (electrostatic test) When

convection, make rational use of cold air, and discharge the warm air correctly, which can greatly save the energy consumption caused by data center cooling. Countermeasure: CoolBoot overhead floor opening Plugging Device Cool Boot is designed to block the outlet holes on the overhead floor. Avoid the cold air under the overhead floor from passing through the outlet hole. Ensure that the cold air is more absorbed and used by network equipment, and the integrity of the cold and hot channels in

to a building, improper use of protective layer materials in the cabling system will pose a great risk to the safety of the building. Structured Cabling uses a variety of plastic materials, and the combustion value is very high. When the temperature is too high, it is easy to cause fire. In order to reduce the damage and harm to people in case of fire, the cables with high fire prevention standards should be selected as much as possible during the implementation of wiring. For polyvinyl chlorid

zone shall comply with the following provisions. ① At least one v ac power outlet should be configured in each work zone, and its installation position should be convenient for use. ② Single-phase power outlet with protective grounding should be selected for power sockets in the work zone, and the protection grounding should be strictly separated from the zero line. Integrated Wiring telecommunications roo

the cause, pcblayout both in the entire PCB board wiring is done well, but due to the power, grounding the consideration of the interference caused by, will make the performance of the product decline, Sometimes it even affects the success rate of the product. Therefore, the wiring of electricity, grounding wire to be taken seriously, the electricity, ground noise caused by the interference to a minimum to

Board design process is a complex and simple process, want to master it well, but also need the vast number of electronic engineering designers to experience, in order to get the true meaning.1 handling of power and groundEven in the entire PCB board wiring completed is very good, but due to the power, grounding the consideration of the interference caused by bad, will make the performance of the product decline, and sometimes even affect the success

same network segment, and the route must be on a different network segment. 6. Broadcast interference The above two terminals connected by bridging equipment connect each other with a set of application software for sending information by radio. When they are running at the same time, both sides of the server will issue an alert: the incomplete package received. This alarm disappears after a set of application software is transferred to another network segment. This is because the broadcast o

, wire metal parts are not exposed to other accessories and chassis, there will be replaced immediately. or the direct selection of nylon nets wrapped wire, which can also play a better insulating effect. In the daily life we should pay attention to the computer wiring harness and power cord of the correct binding solution, to develop a love clean habit, not a lot of wire, cigarette butts everywhere. 　　Written at the end: 1, for the general problem is not serious leakage, friends can

of two pairs of twisted-pair, arranged in 1, 2, 3, 6 position, if the use is not two pairs of lines, but the original pair used by the line used separately, will form a string around, resulting in a larger crosstalk (NEXT). Has a great impact on network performance. 10M network Environment This situation is not obvious, 100M network environment if the flow of large or long distance, the network will not be able to unicom. strictly enforce grounding

sharp decline in service life, and the old equipment quite simple suffered a breakthrough, seriously affecting the stability of the network capacity. The Lightning protection method of network equipment is to do well the grounding device of equipment and to install an effective lightning protective system. The 1th step is to do the security of network equipment grounding, but also to use wireless AP as a

water pipelines, the machine room above or next door can not exist water pipes L The best room without windows, at the same time the computer room without large interference source (air-conditioning host, transformers, launch towers, high-voltage transmission lines, etc.) L The location of the machine room is far away from the Yang Ash area and the surroundings cannot damp L no vibration source around the machine room (railway, large freight road, mine, etc.) 4. load-bearing L CALCULATE the ba

not two pairs of lines, but the original pair used by the line used separately, will form a string around, resulting in a larger crosstalk (NEXT). Has a great impact on network performance. 10M network Environment This situation is not obvious, 100M network environment if the flow of large or long distance, the network will not be able to unicom. 　　 　　 strictly implement grounding requirements Because in the LAN, the transmission is some weak s

PCB Cabling 6 Major principles1 power, ground processing not only in the entire PCB board in the wiring is done well, but due to the power, grounding the consideration of the interference caused by, will make the performance of the product decline, and sometimes even affect the success rate of the product. Therefore, the wiring of electricity, grounding wire to be taken seriously, the electricity, ground no

Notebook function testing, maintenance (level) Tools include: anti-static tools, testing hardware tools, maintenance and disassembly tools, testing software tools, cleaning tools. 1. Anti-static tools: 1 anti-static Ground: Electrostatic release path; 2 Electrostatic Gloves: Reduce the generation and accumulation of static electricity; 3 Anti-Static Ring: Engineers accumulate electrostatic release tools, and anti-static ground connection, constitute the release path; 4 anti-static table clo

." Throughout the layout, they simply show the different trends in their design, do not need them to say too much, and you can feel their thinking in designing products and putting them into the product. Of course, this chestnut is just to help you realize how to establish a good problem statement. Let others know what you have done at the first sight. (The back of the portfolio will be more grounding gas, but can not help to see this very good port

Computer use has always been normal, once on the chassis to remove the parts of the dust removal, reinstall after the boot, the monitor is not displayed. Reinstall the parts again, without resolving the failure. The speaker has a 1 long 2 short alarm, indicating that there is a problem with the monitor or video card, using the replacement hair to check, both are not a problem. Put the video card and monitor back to the faulty computer, found that the video card is not fixed on the chassi

1, the first notebook of external power unplug, the use of battery power supply, if the leakage of the situation disappears, it is the problem of the socket wire; First unplug the external power supply, using battery power. If not disappear suggest to take to repair, if leakage condition disappears, then indicate is the problem of socket ground wire; 2, confirm that the socket has no grounding, you can use a simple method is a pen or multimeter to te

board. 2, welding MINI USB Interface on the circuit board welding a total of six solder joints, four USB data connection, two floor fixed. The main reason is that the mini floor of the fixed point of welding is not tight, loose after the mini connector is directly pushed into the resulting. Welding Needless to say, as long as the original position of welding on the line, the two sides of the grounding point is easy to weld, but four data line cont