1. The AC contactor can replace the DC contactor in an emergency, and the suction time can not exceed 2 hours (due to the poor heat dissipation of the AC coil than the DC, which is determined by their different structures), it is really best to use a resistor in the AC coil for a long time, and DC can not replace the AC contactor;
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 electricity, a large inductive reactance will occur, which is much 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'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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Turck Ethernet IP67 fail-safe I/O modules
Turck's TBPN and TBIP complete fail-safe modules are field-based and function as safety logic controllers, thus helping customers in the modular planning and manufacturing of their machines.
Offline quiz security features to reduce ...
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Choose the accelerometer method – Turck
First, understand the digital output part. When purchasing an acceleration sensor, you must understand the digital output, because this determines the interface between the system and the acceleration sensor, if the number is not enough to correspond, it is inconvenient to use, so you must understand the data at the time of selection.
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Turck's safety inductive sensors
In addition to this new sensor series, Turck's safety technology portfolio also includes safety I/O modules. Thanks to the inclusion of an OSSD output, this safety inductive sensor series provides wear-free detection, safe orientation and range monitoring without the need for a separate device ...
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Turck at CEMAT Logistics
Intelligent production is a hot topic of global concern, and it is also the primary direction of the transformation and upgrading of China's manufacturing industry. One of the important links is how intelligent logistics can serve intelligent production, and the allocation of production materials can be seamlessly connected with intelligent production. CeMAT is held under the theme of "Smart ...
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Turck Vibration Sensor Selection
The first step is to look at the input quantity, how to see the input amount? Performance targets can be judged by the sensor's range or measurement scale, as well as its overload capacity.
The second step is to look at the static characteristics, the static characteristics are the input signal recorded when static, and the parameters that express the static characteristics mainly include linearity, delay...
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Sensor selection criteria – Turck
1. Accuracy
2. Environmental conditions – there are usually limits on temperature/humidity
3. Range – the measurement limit of the sensor
4. Calibration – Essential for most measuring equipment, as readings change over time ...
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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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The pressure sensor is selected with an internal factor in mind – Turck
When selecting a pressure sensor, it is necessary to consider the internal elements of the sensor.
One of the many questions we often encounter in industrial production projects is what type of sensor should we choose, the characteristics of the sensor, the scale and the data requirements? Let's dissect exactly ...
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Turck's PS+ series of pressure sensors
Turck has been selling fluid sensors for more than 20 years, and the PS+ series of pressure sensors is a serious expansion of its existing product range. Designed for fast and straightforward commissioning, the device features sensitive device options, intelligent system integration facilities, and a ...
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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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Turck's roller conveyor belt drives control Ethernet I/O modules
The Ethernet I/O module TBEN-LL-4RMC offers four Interroll EC5000 drum motor drive interfaces, which can control up to 48 motors and is capable of driving special motors up to 48V.
In addition, the module provides 4 digital input channels and 4 general-purpose digital channels ( ...
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The communication of the Lizhun Sensing digital transmitter uses the communication interface - Turck
The communication interface of the digital transmitter of Lizhun sensing is selected, and the special interface is selected. The handling RT module enables HART communication with the transmitter. Digital Combined Pressure/Differential Variable is a multi-functional digital intelligent instrument developed by JIAKE, including capacitive pressure/differential pressure transmitter and direct combined pressure/differential pressure.
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Turck's fluid sensor series wins the Automation Award
Turck's new fluid sensor product has been awarded the Automation Award by elektroAUTOMATION magazine. As the best product of the standard components and sensor set, this award was voted for by on-site users who visited the SPS trade fair in Nuremberg. The combination of a uniform technical concept and functional design, ...
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Sensors and RFID tags in one – Turck
Turck's high-frequency RFID/sensor tags are useful for recording and storing measurements such as temperature and pressure, and are also readable without touch.
At the same time, according to the different needs of different customers, Turck is able to ...
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Turck's zero-point drift problem for pressure sensors
Zero drift is an important indicator that affects the function of the pressure sensor, so when the problem is presented, we should pay attention to it, so what is zero drift? Zero drift refers to when the input signal of the expansion circuit is zero, due to the influence of temperature changes, power supply voltage instability and other factors, so that ...
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What is an SOI high-temperature pressure sensor – Turck
Pressure sensor is a kind of equipment used to detect pressure signals and convert pressure signals into electrical signals according to certain rules, which are widely used in various production, industry and aerospace fields. With the subdivision of application fields, the pressure in high-temperature and harsh environments such as high-temperature oil wells and various engine cavities ...
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Turck's proximity switch principle and precautions
How Turck's proximity switches work
The proximity switch has stable performance, and there is a sensitive adjuster at the tail, which can effectively adjust the distance according to the size. Stability, long detection distance. There are buried and non-embedded. When an object moves towards the proximity switch and approaches to a certain distance, there is a "sense" ...
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Comparison of old and new Turck modules
Old model New model
BL67-16DO-0.1A-P MC 0116 0101
BL 67-1RS232 MC 2501 0000
BL 67-1RS485/422 ...
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