129740-002 Protective devices


129740-002 Protective devices
Brand: ABB
Name: Module
Current: 5A
Voltage: 24V
Mode of use: Hot plug implementation
standard: Import
origin: United States

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129740-002 Protective devices
129740-002 Protective devices
Module Clips Drive controller servo moto

129740-002 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

4.2 Working principle of surface acoustic wave touch screen

Take the X-axis transmitting transducer in the lower right corner as an example: the transmitting transducer converts the
electrical signal sent by the controller through the touch screen cable into sound wave energy and transmits it to the
left surface, and then uses a set of precision reflection stripes under the glass plate The sound wave energy is reflected into
an upward uniform surface and transmitted. The sound wave energy passes through the surface of the screen, and then is
gathered into a line to the right by the upper reflection stripes and transmitted to the X-axis receiving transducer. The receiving transducer
will return the surface acoustic wave. The energy becomes an electrical signal.
When the transmitting transducer emits a narrow pulse, the sound wave energy reaches the receiving transducer through different paths.
The one on the far right arrives earliest, and the one on the far left arrives last. The early and late arrivals are superimposed into one For a
wider waveform signal, it is not difficult to see that the received signal collects all the sound wave energy that has returned after different long
and short paths in the X-axis direction. The distance they have traveled on the Y-axis is the same, but on the The nearest one has traveled twice
the maximum distance on the X-axis. Therefore, the time axis of this waveform signal reflects the position of each original waveform before superposition, which is the X-axis
coordinate. When there is no touch, the waveform of the received signal is exactly the same as the reference waveform. When a finger or
other object that can absorb or block sound wave energy touches the screen, the sound wave energy traveling upward along the X-axis through
the finger is partially absorbed, which is reflected in the received waveform, that is, there is an attenuation gap in the waveform at a
certain moment. The received waveform corresponds to the signal attenuation of a gap in the part blocked by the finger. Calculating the position
of the gap means that the touch coordinate controller analyzes the attenuation of the received signal and determines the X coordinate based on the
position of the gap. Then the same process for the Y axis determines the Y coordinate of the touch point. In addition to the X and Y coordinates
that general touch screens can respond to, surface acoustic wave touch screens also respond to the third axis Z-axis coordinates, which means
they can sense the value of the user”s touch pressure. The principle is calculated from the attenuation of the received
signal attenuation. Once the three axes are determined, the controller transmits them to the host.

4.3 Characteristics of surface acoustic wave touch screen

The clarity is higher and the light transmittance is good. Highly durable and good in scratch resistance (compared to surface film on resistors,
capacitors, etc.). Very responsive. Not affected by environmental factors such as temperature and humidity, high resolution and long life (50 million
times with good maintenance); high light transmittance (92%), able to maintain clear and translucent image quality; no drift, only required
during installation One-time correction; it has a third axis (i.e. pressure axis) response and is currently used more in public places. Surface acoustic wave screens
require regular maintenance, because dust, oil and even beverage liquids contaminating the surface of the screen will block the wave guide
groove on the surface of the touch screen, preventing the waves from being emitted normally, or causing the waveform to change and the
controller to be unable to recognize it normally, thus affecting the performance of the screen. For normal use of the touch screen, users must
pay strict attention to environmental hygiene. The surface of the screen must be wiped frequently to keep it smooth, and a complete wipe must be performed regularly. ”

Contact: Mr. Lai
Whats app:+86 17750010683
Skype:+86 17750010683
QQ: 3221366881



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Company advantage service:
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
All kinds of module card driver controller servo motor servo motor embedded card wires and cables Power module control module is applicable to steel, hydropower, nuclear power, power generation, glass factory, tire factory, rubber, thermal power, paper making, shipping, navigation, etc

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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