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The common control methods of VFD are panel control, terminal control, and Modbus RTU control. The panel control is the simplest, only need to connect the power cable and motor cable, and set the parameters to control the speed and direction of the motor. The terminal control and Modbus RTU control methods are more complicated. The following will show you how to How to control VFD with push button switch/terminal control/wire control

We covered how to calibrate the load cell and connect it to the load display in our previous blog. In the process of using the sensor, sometimes we need the standard analog signal of the sensor, so we need a transmitter to convert the mV signal of the load cell into standard industrial signals, such as 0-20mA, 4-20mA, 0-10V, etc. ATO load cell transmitter is the protagonist of our introduction, its output signal is 4~20mA.

The working of brushed DC motors relies on the interaction between the stator and rotor electromagnetic fields, which are controlled to periodically generate attractive and repulsive forces between the stator and rotor, thereby causing motion. A brushed DC motor has a large number of coils wound around its armature, and the resulting strong magnetic field interacts with an external magnetic field to generate rotational motion.

Safety light curtain is also photoelectric safety protection device (also known as safety protector, punch protector, infrared safety protection device, etc.), generally speaking, safety light curtain exists in pairs, divided into the transmitting end and the receiving end. It is to avoid personnel close to the moving machinery of a photoelectric equipment, can avoid casualties.

A molded case circuit breaker, also known as an installation circuit breaker, is an electrical protection device used to protect a circuit from overcurrent, which can cause an overload or short circuit. All parts are sealed in plastic housing, auxiliary contacts, undervoltage releases and shunt releases are mostly modular. Due to its very compact structure, molded case circuit breakers are basically impossible to repair. Most of them use manual operation, and large-capacity can choose electric switching. Due to the application of electronic overcurrent release, molded case circuit breakers can also be divided into two types: class A and class B. Class B has good three-stage protection characteristics, but due to price factors, the use of thermal magnetic release Class A products have a higher market share.

Centrifugal pumps are widely used in electric power production, because of their wide range of performance (including flow, pressure head and loss of media properties), small size, simple structure, easy operation, uniform flow, long life, Prominent advantages such as lower acquisition costs and lower operating costs. There are many varieties of centrifugal pumps. Although the structures of various types of pumps are different, the main components are basically the same. The main components of the centrifugal pump include: impeller, pump shaft, pump casing, pump seat, stuffing box (shaft seal device), leakage reducing ring, bearing seat, etc.

Solid state relay has reliable operation, long life, no noise, no spark, no electromagnetic interference, fast switching speed, strong anti-interference ability, and small size, impact resistance, oscillation resistance, explosion-proof, moisture-proof, anti-corrosion, compatible with TTL, DTL, HTL and other logic circuits, with small control signals to directly drive large current load.

Proximity sensors are known as non-contact travel switches which are generally widely used in material sorting control systems and automatic detection. Proximity sensors are divided into inductive proximity sensor, capacitive proximity sensor, magnetic proximity sensor, analog proximity sensor and Hall proximity sensor, which can detect whether there is an object approaching within a range of several millimeters to tens of millimeters. When the distance between the object and the proximity switch reaches a certain range, this proximity sensor can send out the corresponding action signal.

After the sensor is powered on, a green light will be emitted through the lens, and the light-colored plane will gradually approach the light source. When the set distance is reached, the sensor signal output will be triggered. When the dark block is moved to the light source of the sensor, it can be found that the trigger of the sensor is relieved. We can also adjust the sensitivity through a knob.

Fiber optic amplifier can be used as a type of beam or diffuse sensor. The combination of fiber amplifiers and fiber sensing can meet the induction requirements of complex and variable industrial automation systems. Optical fiber can be easily integrated in space limited places to solve the problem of difficult signal collection; Fiber optic sensor can process signals with high precision and convert different information to output to automatic systems.

Hall effect magnetic proximity sensor can achieve the largest detection distance with a small switch volume. It can detect magnetic objects (usually permanent magnets), and then generate a trigger switch signal output. Since the magnetic field can pass through many non-magnetic objects, this triggering process does not necessarily require the target object to be directly close to the sensing surface of the magnetic proximity switch, but the magnetic field is transmitted to a long distance through a magnetic conductor.

The rotary encoder is a device used to measure the speed and cooperate with PWM technology to realize rapid speed regulation. The photoelectric rotary encoder can convert the angular displacement, angular velocity and other mechanical quantities of the output shaft into corresponding electrical pulses through photoelectric conversion. output (REP). Divided into single output and dual output. The technical parameters mainly include the number of pulses per revolution (dozens to thousands), and the power supply voltage. Single output means that the output of the rotary encoder is a set of pulses, while the rotary encoder with double output outputs two sets of pulses with phase A/ B difference of 90 degrees. Through these two sets of pulses, not only the speed can be measured, but also the rotation can be judged direction.

A contactor is an electrical appliance that uses a current flowing through a coil to generate a magnetic field to close the contacts to complete the control of the load. As a kind of contactor, the AC contactor also controls the load, but there is an additional precondition on the original basis. The AC current flows through the coil. AC contactors have been widely used at present, high performance lighting contactors and 1 pole - 4 pole definite purpose contactors are popular AC contactors.

Centrifugal pump refers to a pump that transports liquid by the centrifugal force generated by the rotation of the impeller. Centrifugal pumps are widely used and are almost indispensable equipment in process systems. The small size, simple operation and long service life of the centrifugal pump are the outstanding advantages of the centrifugal pump. If the pipeline delivery system is regarded as the vascular circulation system of the human body, then the centrifugal pump is equivalent to the heart that transports blood.

Proximity sensor is a new type of integrated switch, which is an ideal electronic switch sensor. It has a lot of advantages, including small size, fast frequency response, wide voltage range, strong anti-interference ability, high repositioning accuracy, high operating frequency, reliable operation, long life, low power consumption, corrosion resistance, vibration resistance and adaptability to harsh working environments. What’s more, there will be no friction during the use of the proximity sensor, and will not increase the torque of each sensed element.

The inverter converts DC power (battery, storage battery) into AC power (usually 220V 50Hz sine or square wave). In general, an inverter is an electronic device that converts low voltage (12, 24, 48 volts, etc.) DC power into 220V AC (or other voltages) power. It consists of an inverter bridge, control logic and filter circuit. In daily life, 220 volt alternating current is usually rectified into direct current for use, and the inverter is the opposite. We are in an era of "mobile", mobile office, mobile communication, mobile leisure and mobile entertainment. In the mobile living state, not only the low-voltage direct current supplied by the battery or the battery is required, but also the alternating current which is indispensable in the daily environment. The inverter is to meet our needs.

DC reversing contactor is a switching appliance suitable for remote manipulation (closing, opening or switching) of high-power electrical appliances. The contactor is used in electric vehicles, and the coil consumes a large amount of power, which is generally used for intermittent duty. DC contactors are mainly used for making and breaking DC circuits at a long distance and frequently starting, stopping, reversing and reversing braking DC motors, and also for frequently connecting and disconnecting lifting electromagnets, solenoid valves, clutches electromagnetic coils, etc.

When the brushed DC motor is working, the coil and the commutator rotate, but the magnetic steel and the carbon brush do not rotate. The alternating change of the current direction of the coil is accomplished by the commutator and the carbon brush that rotate with the motor. Compared with brushless motors, brushed motors have fewer wires, just one positive and one negative wire. If the BDC motor needs to be reversed, just switch the position of the two wires and it will be done.

A DC-DC converter is a power supply or electromechanical device which can convert a direct current (DC) power source from one level to another. Its power can range from very small (small power source) to very large (high voltage power conversion). Some DC-DC converters have the same reference point for the output voltage and input voltage, while some DC-DC converters have the output voltage isolated from the input voltage.

A circular connector is a type of electromechanical component used to make or break an electric circuit. These multi-pin connectors are basically cylinder-shaped and feature a circular mating surface designed for connection. What does its inner structure looks like? How do we disassemble it for wiring? What benefits could it bring to us? Where are they applied? This blog will lead you to the answers.