Introduction to the features of the full range of Siemens APT metal button FM products

On March 31, 2009, the 12th Northeast International Instrumentation and Industrial Automation Exhibition was successfully opened in Shenyang, the industrial hinterland of Northeast China. In recent years, with the national revitalization of the old industrial base in Northeast China and the gradual deepening of the equipment manufacturing industry, the rapid development of Northeast China has provided ...

The difference between the voltage transformer and the current transformer in terms of effect principle The primary difference is that the operating conditions are very different during normal operation, and the main performance is as follows: 1) The current transformer can be short-circuited twice, but it cannot be opened; The voltage transformer can be opened twice, but it must not be short-circuited 2) ...

1. First of all, there is a general understanding of the knowledge of the limit switch, which is usually composed of a shell, an interconnection system and an operating head. 2. First of all, the limit switch should be set to the desired location, and then connected, in addition, it is necessary to figure out the meaning of different letters, such as NC for the long ...

1. Working process: AC zero-crossing solid state relays have the characteristic of turning on when the voltage crosses zero and turns off when the load current crosses zero. Circuit diagrams, dimensions and drawings of zero-crossing AC solid state relays When the optocoupler OPT is turned off (i.e. there is no input signal at the control end of the OPT ...

On April 22, 2015, the "2015 China Automation Industry Annual Conference and the 10th China Automation Industry Century Event" sponsored by the Chinese Association of Automation was held in Beijing. At the conference, APT won the "2014 Top Ten New Enterprises in China's Automation Field" award, which was awarded by APT last year.

Solid state relays consist of three parts: the input circuit, the isolation (coupling), and the output circuit. Input circuitry According to the different categories of input voltage, the input circuit can be divided into three types: DC input circuit, AC input circuit and AC and DC input circuit. Some input control circuits are also ...

The principle of the current transformer is based on the principle of electromagnetic induction. A current transformer is composed of a closed core and windings. Its primary side winding turns are very small, string in the line of the current that needs to be measured, so it often has all the current of the line flowing through, the number of turns of the secondary side winding is relatively large, and the series ...

1. The resistive load should not exceed 60% of the rated current; 2. Overcurrent and load short circuit may cause permanent failure of the internal thyristor in SSR, so it is necessary to install a fuse or air switch, and a fuse can be used if the capacity is small; 3、 ...

1. The simplest and most effective way is to use a new solid state relay. 2. The other is to determine the voltage of the coil to avoid the voltage provided by the coil being less than the operating voltage. 3. Check whether the polarity is reversed. 4. Reasonable power-on time for the solid state relay coil, if ...

1. The influence of the environment on the reliability of the relay: the average time between failures of the relay is the highest under GB and SF, reaching 820,000h, while in the NU environment, it is only 60,000h. 2. The influence of quality grade on the reliability of relays: when the relay of A1 quality grade is selected, the flat ...

1. What is the maximum voltage that can be used for an ALH transformer? AC low voltage up to 720V 2. Is there a protective grade product for ALH transformers? II-P AND III-P are available in both protective grades 3. What is the maximum primary current of ALH transformer? The maximum primary side current is 8 ...

Tianjin is a typical industrial city. Due to the steady progress of "three districts and one base", the advanced manufacturing industry has developed rapidly in recent years. Siemens APT brought a variety of low-voltage control products to the 14th China (Tianjin) International Industry Fair held from March 15-18. Siemens APT has launched the PB1...

1. Some common faults of high-voltage relay coils 1. The common fault cause of the coil is often disconnected: whether the ultrasonic wave is used to clean the high-voltage relay, or whether the overvoltage is added to the coil will also promote the probability of the coil being disconnected. 2 ...

1. Regular cleaning: The relay needs to be cleaned regularly with dust and dirt to keep its surface clean and smooth. It can be cleaned with a clean cloth or brush, and detergents containing acids and bases should be avoided. 2. Check the wiring: The wiring of the relay needs to be fastened firmly, and the contact ...

1. Visual inspection method: observe the appearance of the relay by the naked eye, check whether it is damaged or deformed, observe whether the contacts are tightly contacted, and whether there are copper slag and other substances attached to the contacts. 2. Parameter detection method: use test instruments to detect the parameters of the relay, such as: ...

1. What are the installation methods of ALS limit switches? Usually the limit switch is divided into front of the board installation or board back installation, all of which are installed by screws. 2. What are the different modes of limit switch action? According to the action mode of the limit switch head, it is divided into ...

1. Electromagnet: The electromagnet of high and low voltage relay is usually composed of two parts: coil and core. When the high and low voltage relay inputs the electrical signal, the electromagnet coil will generate electromagnetic force, drive the iron core, and realize the on/off control of the relay. 2. Contact group: The contact group is a high and low voltage relay control ...

Solid state relay is a non-contact electronic switch with isolation function, no mechanical contact parts in the switching process, so in addition to having the same function as electromagnetic relay, solid state relay also has logic circuit compatibility, vibration resistance and mechanical impact resistance, unlimited installation position, and good anti-...

1. Since the current through the AC electromagnetic relay is a changing alternating current, the magnetic flux in the magnetic circuit also changes with the alternation (sinusoidal law instead of straight line law). The suction force of the armature is varied between 0 and the maximum, so the suction of the AC electromagnetic relay is pulsating, variing.

1. Electrical parameter matching: The rated voltage and current of the high-voltage relay need to match the circuit demand, too small will lead to the failure of the switch, too large will waste the cost. 2. Mechanical parameter adaptation: the external dimensions, pin arrangement and wiring mode of the high-voltage relay need to be adapted to the actual installation ring.