1. The AC contactor can be used as a substitute for the DC contactor in an emergency, and the suction time can not exceed 2 hours (because the heat dissipation of the AC coil is worse than that of DC, which is determined by their different structures), and it is really necessary to use it for a long time.
2. The number of turns of the coil of the AC contactor is small, and the number of turns of the coil of the DC contactor is large, and the volume of the coil can distinguish the case of excessive current in the main circuit (Ie>250A), and the contactor adopts a series double-winding coil;
3. The reactance of the coil of the DC contactor is large and the current is small. If it is said that it will not be damaged when it is connected to the alternating current, it will be released at the right time. However, the reactance of the coil of the AC relay is small, and the current is large, and if the DC is connected, the coil will be damaged;
4. The number of turns of the coil of the AC contactor is small, and the resistance is small, when the coil is connected to the communication current, a large inductive reactance will occur, which is far greater than the resistance of the coil, and the excitation current of the coil mainly depends on the size of the inductive reactance. If direct current is fed in, the coil becomes a purely resistive load, and the current flowing through the coil will be very large, causing the coil to heat up or even burn out. Therefore, the communication contactor cannot be used as a DC contactor.
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Advantages of photoelectric sensors – Turck sensors
(1) Long detection intervals
If the detection interval of more than 10 m is maintained in the through-beam type, other inspection methods (magnetic, ultrasonic, etc.) can be completed.
(2) There are few constraints on the detected object
Because with ...
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Turck teachable capacitive sensors are introduced
Turck's BCT series sensors feature teachable pushbuttons and LEDs at the rear of the body for maximum user convenience.
Turck is presenting a new generation of capacitive sensors from the BCT series, which are primarily used for level detection. Use...
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The difference between load cells and load cells – Turck
1. Materials
Load cells require stringent parameters such as creep of the output signal, temperature drift and zero point stability, so the metal properties of the sensor elastomers such as deformation, internal stress relief, as well as zero point stability and temperature compensation on the strain gauge are more demanding. And the load cell ...
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Turck's key points for selecting proximity switches
1. For different viewing bodies and different viewing distances of different raw materials, different types of Turck proximity switches should be selected to make them have a high performance-to-price ratio in the system, for which the following criteria should be followed in the selection:
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Distinguish between the true and false output signals of the sensor – Turck
Sensors are used in almost every profession in modern times, and these occupations can record according to the signals sent by the sensors, so how do they distinguish the authenticity of the output signals of the sensors?
1. Distinguish from the void voltage
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Load cell maintenance method – Turck
1. The load cell in a high-temperature environment will cause problems such as melting of coating materials, solder joint openings and changes in the stress structure of elastomers. Load cells operating in high-temperature environments usually use high-temperature sensors; In addition, they must be insulated, water-cooled, or air-cooled, etc.
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Anti-jamming technology in sensor detection – Turck
1. Shielding skills
Containers are made from metal materials. Wrapping circuits that require maintenance between them can effectively prevent the disturbance of electric or magnetic fields, and this method is called shielding. Shielding can be divided into electrostatic shielding, electromagnetic shielding and low-frequency magnetic shielding.
2. Electrostatic shielding
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Sensor technology contributes to the rapid development of the robotics industry – Turck
Since the beginning of the 60s, China has made great progress in sensor research and development, planning, production, reliability improvement, etc., and has initially formed a system of sensor research, development, production, production and application.
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Introduction to the characteristics of Turck's current transformers
The current transformer plays an important role in the electrical, so the requirements for some characteristics of the current transformer are also relatively high, in order to get used to the sensitivity and speed of electrical action.
First, according to the equivalent circuit diagram of the current transformer ...
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Submersible level transmitter installation steps
1. Devices in static water (deep wells, pools, liquid irrigation, etc.)
1. When measuring the stop fluid level in the open container, put the liquid level transmitter vertically into the bottom of the container, and fix the cable connecting the transmitter and the junction box at the opening of the container.
2. When the medium is viscous ...
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Three-wire connection for proximity switches – Turck
There is a difference between the two-wire system and the three-wire system of the proximity switch, and the three-wire system proximity switch is divided into NPN type and PNP type, and their wiring is different.
The wiring of the two-wire proximity switch is relatively simple, and the proximity switch is connected in series with the load.
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The main thing about Turck's inductive sensors
1. Attenuation of detection distance. The slip warp is made of iron, which is suitable for inductive sensor detection; The scale of the measured part of the slippery warp is slightly smaller than the scale of the standard test object, so there will be a certain attenuation.
2. On-site anti-disturbance ...
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The basic building block of a load cell is Turck
Sensitive components
Load cell: A component that directly senses the measured (mass) and outputs other quantities that are definitely related to the measured amount. For example, the elastomer of the resistance strain gauge load cell is to transform the mass of the measured object into deformation; The elastomer of the capacitive load cell will be tested ...
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Turck's method for commissioning pressure sensors
An example of Turck's debugging method for turck pressure sensors is as follows: Select a 0.08-2MPa planned controller, request the pressure to be reduced to 0.8MPa (down switching value) to announce the contact signal, and the operation process is as follows:
Screw the product into the hydraulic pressure ...
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Considerations for the selection of inductive sensors
1. Program selection
Before selecting a plan, the given technical indicators should be clarified, such as the scale of the value, the error of the value, the resolution, the repeatability error, the time drift, the temperature drift, the application environment, etc.
2. The selection of core data ...
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Prone to malfunctions of pressure sensors – Turck
The first is pressure, and the transmitter can't afford to lose it. In this case, look at the pressure connector to see if it is leaking or clogged, if you admit that it is not, look at the wiring and see if the power supply is normal, simple pressure to determine if the output has changed, or if there is an output at the zero point of the sensor ...
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Temperature and humidity sensor purchase - Turck
Temperature and humidity are closely related to people's lives, which has led to the creation of a sensor that integrates temperature and humidity. A temperature and humidity sensor is a device or device that converts the amount of temperature and humidity into an electrical signal that can be easily measured and processed. When buying a temperature and humidity sensor, you need to pay attention to ...
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The load cell measures the magnitude of the external gravity
(1) The shape of the elastomer element should be as regular as possible, generally rectangular and circular. During the measurement process, conventional elastomers can be identified by sensors more easily and accurately.
(2) The surface process should be precise and the density should be very uniform. Elastomers as part of the main force ...
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The robust OPC UA RFID modules have a high degree of protection
The OPC UA communication standard is channel-agnostic, making TBEN-L OPC UA easy to integrate ERP, MES or cloud architectures as well as RFID architectures in controllers. In addition, authorization and integrated security protocols protect the system from unauthorized access and manipulation.
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Advantages of Turck's decentralised automation technology
Modularity will win over the field of mechanical engineering, but it is fully in line with expectations and reasonable. Other occupations may have successfully transitioned from craft production to continuous production. In the case of continuous production, the power can be increased through large-scale production. The monotonous process will be automated, so that the employee ...
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