esd grounding

electric energy. They determine the number of devices in the Power Distribution Device and indicate how to connect generators, transformers, and lines, and how to connect to the system to complete the transmission and distribution task. 9. Current Transformer: The instrument converter is an instrument that converts large current into small current. 10. Transformer: a static electrical device used to change the AC voltage of a certain value to another type or multiple types of AC voltage with th

attenuation of signals in cable transmission. It is a key parameter that determines the available bandwidth. External Noise Noise enters the channel through external electromagnetic fields near the channel. Non-Direct electrostatic discharge (ESD) or fast current transient (EFT) is one of the external noise sources. In the cabling system of the company, products with excellent balancing performance solve this noise problem. Balancing is the degree to

potential reference point, but it is not necessarily a terrestrial potential. If the grounding system is connected to the Earth by a low resistance path, it is called the Earth. If the grounding system is not connected with the Earth, but is insulated from the Earth, it is called a DC suspension. Usually after the appropriate treatment and grounding, that is, th

line!The most fundamental problem is that the current going through this line is going to two different circuits.Suppose there are two currents, a digital stream, and a model stream starting from the ground at the same time. There are 2 devices, several devices, and modules.If the two circuits are not separated, the loss voltage is V when the model flow is back to the front of the grounding end of the several parts.V = (digital stream + die stream) x

Http://wiki.ubuntu.org.cn/problem solving solution: software_mixing A much better way of getting ESD to work with non-ESD-aware apps is to make ALSA use its software mixer.Enable ALSA to use its own software mixer to work together with applications that are not recognized by ESD. $ Sudo/etc/init. d/ALSA-utils stop $ sudo gedit/var/lib/ALSA/asound. State(Add the f

point-to-point connection channel, it is very difficult to achieve, because the information plug-in, jumper, and so on are difficult to achieve full shielding, coupled with the corrosion of the shielding layer, oxidation damage and other factors, therefore, no channel can truly block the whole process. At the same time, the shielding layer of the shielded cable has poor shielding effect on the low-frequency magnetic field and cannot resist the low-frequency interference caused by equipment such

floor should not have a telephone switch room. However, some units are restricted by the conditions and do not set up switch rooms in accordance with the above principles. For example, the Programmable switch room of Guangdong Ying hotel is located in the basement room on the building. According to the relevant provisions of IEC1312-1 lightning electromagnetic pulse protection, the building area in the lightning protection area is divided into LPZOB area, the electromagnetic field in the area d

Programmable switch room of Guangdong Ying hotel is located in the basement room on the building. According to the relevant provisions of IEC1312-1 lightning electromagnetic pulse protection, the building area in the lightning protection area is divided into LPZOB area, the electromagnetic field in the area does not decay, the switch is greatly affected by the electromagnetic field. Determine the grounding system of the switch The

called the logic location. In order to make the computer work normally, the DC ground is the zero potential reference point, but not necessarily the ground potential. If the ground system is connected to the Earth through a low-resistance path, it is called a ground connection. If the grounding system is not connected to the Earth, but insulated from the Earth, it is called dc suspension. Generally, after proper treatment,

need to be connected to the final resistance. The final resistance is generally 100 Ω in the RS-422 network, and 120 Ω in the RS-485 network. It is equivalent to the resistance of the characteristic impedance of the cable, because the Characteristic Impedance of most twisted pair cables is about 100 ~ 120 Ω. This matching method is simple and effective, but there is a drawback that the matching resistance consumes a lot of power and is not suitable for systems with strict power consumption rest

capacitor C to cut off the DC component can save most of the power. However, the value of capacitor C is a challenge, and the compromise between power consumption and matching quality is required. There is also a matching method using diodes, 10. Although this solution does not achieve true "matching", it uses the clamp action of the diode to quickly weaken the reflected signal and improve the signal quality. The energy saving effect is remarkable. Figure 9 10 6.

There are many things worth learning about the Integrated Wiring Specification. Here we will mainly introduce the Integrated Wiring Specification, including the Integrated Wiring Specification and the questions about the grounding, and hope to help you, I believe that you can learn more. In the control system, multiple inverters are controlled using the analog quantity of PLC. the characteristics of the inverter itself produce strong interference sign

: Isolation cutter, circuit breaker, Transformer, trolley, circuit breaker. Trunk1 bus to direction Source: L SOURCE2: Isolating knife gate. 3.5 Definition: Trunk (BUS) Trunk a wire that is used to enter lines of each branch and output voltages to other branches. The switch isolation and break breaker switches are connected between trunk and trunk, including 1 circuit breakers, 2 isolation cutters, and 2 grounding cutters. Figure 3.5-1 Trunk Bus 1) T

the iec1312-1 "Lightning Electromagnetic pulse Protection", the section of the building is divided into the Lpzob area in the Lightning protection area, in which the electromagnetic field does not decay, and the switch is greatly influenced by the electromagnetic field. Determine the grounding system of the switch The earthing of the program-controlled switchboard includes: The DC power supply grounding,

the overall shielding of the dual-twisted cable should be noted that shielding only in the entire cable has shielding devices, and both ends of the correct grounding in the case to play a role. Therefore, the requirements of the entire system are shielding devices, including cables, sockets, crystal head and wiring racks, and the building needs to have a good ground system. From the electromagnetic compatibility point of view, s/ftp cable because of

, M corresponds to 38U, and m corresponds to 42U, 2 m corresponds to 47U. Ii. Concept of Grounding If the ground is grounded by signals or the chassis is connected to the earth, the signal grounding function of the device is to provide the level reference plane of some or all circuits of the device, the Ideal Grounding plane is a physical entity with zero potenti

Portable consumer electronics is a kind of product, which is closely related to daily work, life and study, and its coverage is very extensive, and its function is more and more abundant. In many portable consumer electronics products are undoubtedly the highest penetration of mobile phones, notebook computers in the global shipments have been more than two years ago desktop computers, digital cameras / digital cameras,mp3/mp4 As a more exclusive function of daily life of digital products, the

breaker. Trunk1 bus to direction Source: L SOURCE2: Isolating the knife gate. 3.5 Definition: Trunk (busbar) The trunk is used to enter wires for each branch line and output voltage to other branches. Between trunk and trunk by switch isolation and break circuit breaker switches connected, mainly including 1 circuit breakers, 2 isolation Knife Gate, 2 grounding gate combination. Figure 3.5-1 Trunk Busbar 1) Trunk and branch mapping relationship: Whe

should reach above 35mm, the whole adjustment should be made after the wire groove is connected, please check the leveling instrument, strictly forbid the ground line trough exceeding high. The connector, the junction box, the line Groove Interface application seals the seal to be good, prevents the mortar to penetrate the corrosion groove inner wall. In the process of connecting the groove, the outlet, the junction box should be added waterproof protection cover, when the concrete strength of

dedicated tool to install other parts of the module in place.5. According to the configuration of the manufacturer, the shielding layer of the module can be reliably connected to the copper foil, and the whole shielding part of the module can be reliably installed in place.6. to avoid the impact of bending torque caused by cable laying on the connection between cables and modules, the bending and torsion stress release device should be installed after the module is installed, fix the shielded c