Description
XP-301-10T-10 Industrial control panel
XP-301-10T-10 Industrial control panel
Module Clips Drive controller servo moto
XP-301-10T-10 Industrial control panelSuitable for steel manufacturing, thermal power generation, hydroelectric power generation, nuclear power generation, wind power generation, gas supply, and other glass manufacturing, paper mills, mechanical manufacturing, electronic manufacturing, automotive manufacturing, aviation manufacturing, chemical manufacturing, coal mining and selection, oil and natural gas mining and selection, metal mining and selection, and non-metallic mining and selection
Design challenge three
Touch buttons, touch sliders and touch pads all use copper foil as touch sensors, but touch screens basically use ITO (Indium Tin Oxides) material as the touch sensing layer. The resistivity of copper foil is extremely small, so its resistance is almost negligible. ITO is transparent and conductive, but ITO has a relatively high resistivity. Usually the resistivity of ITO is expressed as square resistance on touch screens, that is, the resistance of a unit square. Generally, the sheet resistance of ITO ranges from 45 to 350 ohms, depending on the coating process of the touch screen manufacturer. Due to the existence of ITO resistors, there will be a resistance of 3K~30K ohms at the near end and far end of each sensing strip on the touch screen. This resistance combined with the RC delay generated by the self-capacitance on each sensing strip makes the induction The near and far ends of the bar will have different response times or charge and discharge times for the emitted signals, which will lead to different sizes of finger touch signals at the near and far ends. In severe cases, this difference can reach more than 50%. How to eliminate or reduce this difference is the third challenge in multi-point capacitive touch screen design. Although choosing an ITO coating with lower sheet resistance is the most direct way to reduce this difference, usually the thickness of ITO coating with lower sheet resistance will be thicker, resulting in a decrease in transparency and an increase in cost. This is unacceptable to many end customers.
Design challenge four
Signal-to-noise ratio (SNR) is one of the most important indicators in multi-point capacitive touch screen design. For a touch screen, it is not enough to have a large enough finger signal. In fact, the touch screen is not in an ivory tower, and there are many noise sources around it. For example, the LCD immediately below it is a noise source. Different LCDs and even different display screens have different noise sizes and spectra. Especially for some AC Vcomm type LCDs, it can produce current noise up to 15nA/mm2 and voltage noise above 1V on the surface of the LCD. Although the solution of placing an ITO shielding layer under the touch screen has been adopted by some designers, the increase in the shielding layer leads to an increase in the thickness and cost of the touch screen, which also affects visibility to a certain extent. Not all end customers may accept this. The radio frequency signal of the mobile phone itself and the electromagnetic waves from the outside will also interfere with it. When a terminal with a touch screen is powered by external mains power, a large amount of common mode noise may be generated from the power grid and power adapter. There are also troublesome charger noise, noise generated by the touch screen and the system itself, such as AD conversion noise, switching noise, power supply noise and 8 kV ESD noise used in ESD testing. In such a noisy environment, how to make the touch screen system have good noise immunity to noise from various noise sources and obtain a high enough signal-to-noise ratio is the fourth challenge in multi-point capacitive touch screen design.
Contact: Mr. Lai
Wechat:17750010683
Whats app：+86 17750010683
Skype：+86 17750010683
QQ: 3221366881
3221366881@qq.com
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1.Has been engaged in industrial control industry for a long time, with a large number of inventories.
2.Industry leading, price advantage, quality assurance
3.Diversified models and products, and all kinds of rare and discontinued products
4.15 days free replacement for quality problems
ABB — AC 800M controller, Bailey, PM866 controller, IGCT silicon controlled 5SHY 3BHB01 3BHE00 3HNA00 DSQC series
BENTLY — 3500 system/proximitor, front and rear card, sensor, probe, cable 3500/20 3500/61 3500/05-01-02-00-001 3500/40M 176449-01 3500/22M 138607-01
Emerson — modbus card, power panel, controller, power supply, base, power module, switch 1C31,5X00, CE400, A6500-UM, SE3008,1B300,1X00,
EPRO — PR6423 PR6424 PR6425 PR6426 PR9376 PR9268 Data acquisition module, probe, speed sensor, vibration sensor
FOXBORO — FCP270 FCP280 FCM10EF FBM207 P0914TD CP40B FBI10E FBM02 FBM202 FBM207B P0400HE Thermal resistance input/output module, power module, communication module, cable, controller, switch
GE —- IS200/215/220/230/420 DS200/215 IC693/695/697/698 VMICPCI VMIVME 369-HI-R-M-0-0-E 469 module, air switch, I/O module, display, CPU module, power module, converter, CPU board, Ethernet module, integrated protection device, power module, gas turbine card
HIMA — F3 AIO 8/4 01 F3231 F8627X Z7116 F8621A 984862160 F3236 F6217 F7553 DI module, processor module, AI card, pulse encoder
Honeywell — Secure digital output card, program module, analog input card, CPU module, FIM card
MOOG — D136-001-007 Servo valve, controller, module
NI — SCXI-1100 PCI – PXIE – PCIE – SBRIO – CFP-AO-210 USB-6525 Information Acquisition Card, PXI Module, Card
Westinghouse — RTD thermal resistance input module, AI/AO/DI/DO module, power module, control module, base module
Woodward — 9907-164 5466-258 8200-1300 9907-149 9907-838 EASYGEN-3500-5/P2 8440-2145 Regulator, module, controller, governor
YOKOGAWA – Servo module, control cabinet node unit
Main products:
PLC, DCS, CPU module, communication module, input/output module (AI/AO/DI/DO), power module, silicon controlled module, terminal module, PXI module, servo drive, servo motor, industrial display screen, industrial keyboard, controller, encoder, regulator, sensor, I/O board, counting board, optical fiber interface board, acquisition card, gas turbine card, FIM card and other automatic spare parts
