Description
PFVO142 3BSE023732R1 Protective devices
PFVO142 3BSE023732R1 Protective devices
Module Clips Drive controller servo moto
PFVO142 3BSE023732R1 Protective devicesSuitable 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
What are the common types of touch screens? What characteristics do they have?
Touch screens can be divided into five basic categories based on technical principles: vector pressure sensing technology touch screens, resistive technology touch
screens, capacitive technology touch screens, infrared technology touch screens, and surface acoustic wave technology touch screens. According to the working principle
of the touch screen and the medium for transmitting information, the touch screen is divided into four types, which are resistive type, capacitive induction type, infrared type
and surface acoustic wave type. Below we introduce four types of touch screens classified according to their working principles and the media used to
transmit information.
1. Resistive touch screen
The resistive touch screen is a sensor, which is basically a structure of film and glass. The adjacent sides of the film and glass are coated with ITO
coating. ITO has good conductivity and transparency. When a touch operation is performed, the ITO on the lower layer of the film will contact the ITO on the upper layer of the glass,
and the corresponding electrical signal is transmitted through the sensor, sent to the processor through the conversion circuit,
and converted into X and Y values on the screen through calculation, and the point is completed. The selected action is displayed on the screen.
The advantages of the resistive touch screen are that its screen and control system are relatively cheap, have good response sensitivity, are
not afraid of dust and water vapor, and can adapt to various harsh environments. It can be touched with any object and has good stability. The advantages of the resistive touch screen
can be classified as: 1. The resistive touch screen has high accuracy, down to the pixel level, and the maximum applicable resolution can reach 4096×4096. 2. The screen is not affected by
dust, water vapor and oil stains , can be used in lower or higher temperature environments. 3. The resistive touch screen uses pressure sensing
and can be touched with any object, even with gloves, and can be used for handwriting recognition. 4. Resistive touch screens are relatively cheap due to mature technology and low threshold.
The disadvantage is that the outer film of the resistive touch screen is easily scratched, making the touch screen unusable. The multi-layer
structure will cause a large light loss. For handheld devices, it is usually necessary to increase the backlight to make up for the problem of poor light transmittance, but this also
Will increase battery consumption. The disadvantages of resistive touch screens can be classified as: 1. Resistive touch screens can be designed for multi-touch, but when two points
are pressed at the same time, the pressure on the screen becomes unbalanced, resulting in touch errors and many
The implementation of touch control is difficult. 2. Resistive touch screens are more likely to be damaged due to scratches, etc.
2. Capacitive touch screen
Capacitive technology touch screens work by utilizing the human body”s current induction. The capacitive touch screen is a four-layer composite glass screen. The inner surface
and interlayer of the glass screen are each coated with a layer of ITO. The outermost layer
is a thin layer of silica glass protective layer. The interlayer ITO coating serves as the working surface, and leads out from the four corners. Four electrodes, and the inner
ITO layer is a shielding layer to ensure a good working environment. When a finger touches the metal layer, due to the electric field of the human body, a coupling capacitance
is formed between the user and the touch screen surface. For high-frequency current, the capacitance is a direct conductor, so the finger draws
a small current from the contact point. This current flows out from the electrodes on the four
corners of the touch screen, and the current flowing through these four electrodes is proportional to the distance from the finger to the four corners. The controller obtains the
position of the touch point by accurately calculating the ratio of these four currents. . Capacitive touch screens require only touch, not pressure, to generate a signal.
Contact: Mr. Lai
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W24MT25 ACOPIAN AC DC Single output
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1756-L55M12 Processor components
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5SHY4045L0001 3BHB018162R0001 3BHE009681R0101 GVC750BE101
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VMIVME-7750 VMIVME-7750-760000 350-027750-760000 N
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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
