Siemens APT limit switch - wiring method of limit switch

1. What are the basic combination colors of combination lights? Red, yellow, green, blue, white, bicolor. 2. What are the different types of combination light panes? F, H, L, V, G any combination 3. Is the lampshade detachable? OK 4. Combination light ...

1. How many light sources are there for the TL-70 police light? There are 3 types, namely LED, incandescent and xenon. 2. What are the colors of the TL-70 police light? There are 5 types, which are red, yellow, green, blue, and white. 3. What are the types of TL-70 police lights? 3 ...

First, the contact is loose and cracks The contact is the electrical contact part of the relay to complete the switching load, and the contact of some products is riveted and pressed, and its main drawbacks are loose contacts, cracked contacts or excessive dimensional position deviation. This will affect the contact reliability of the relay. Shovel appears ...

1. Most of the multiple values can be seen from the nameplate attached to the instrument, which will show the style of the value/value, which can be known by dividing the previous value by dividing the back value when calculating the standard core-piercing turns. If the actual number of turns of the grommet does not conform to the standard, then the multiple should be ...

(1) Rated working voltage: refers to the voltage required by the coil when the relay is working normally. Depending on the type of relay, it can be either AC voltage or DC voltage. (2) DC resistance: refers to the DC resistance of the coil in the relay, which can be measured by a multimeter. ...

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. Structural characteristics of AC relays The coil of the AC relay is shorter, and the wire diameter is thicker, mainly because the coil is passed through the alternating current, the reactance is larger, and the thick wire diameter can reduce the internal resistance and reduce the heat generation.

First, the solid-state relay has no contacts and coils in the structure, which can be opened and closed at a high frequency and will not produce sparks, and has a long service life; Second, the intermediate relay is generally only used for the control loop, and cannot work with load, and will make a "pop" sound when it is sucked in; ...

1. The type and series of relay selection First of all, the type of relay is selected according to the work requirements of the object to be controlled or protected, and then the appropriate series is selected according to the sensitivity or accuracy requirements. When choosing a series, you should also pay attention to the compatibility of the relay with the system. (1) ...

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. Current transformers are classified according to the installation method According to the installation method, the current transformer can be divided into through-type current transformer, pillar type current transformer, bushing type current transformer, and busbar type current transformer. Through-type current transformer: used to pass through the screen or wall...

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.

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 ...

(1) The influence of the internal resistance R2 and leakage impedance X2 of the secondary coil on the error: when R2 increases, the specific difference and angular difference increase; As X2 increases, the specific difference increases, but the angular difference decreases. Therefore, to improve the error, R2 and the appropriate X2 value should be minimized. Due to the secondary coil internal resistance R2 and leakage ...

LED warning light function 1. The luminous method selection items are: solid light, shiny, burst flash, constant/shiny mix. 2. The installation base is: L rod, straight rod, folding, and barrel type. Effect of LED warning light_Effect in different scenes 1. Construction unit On the road ...

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 ...

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 ...

When the solid state relay is open and there is voltage at the load end, there will be a certain leakage current at the output end, and care should be taken to prevent electric shock when using or designing. When the solid-state relay fails to be replaced, the original model or the product with the same technical parameters should be selected as far as possible, so as to match the original application line and ensure that the system ...

There are several types of pushbutton switches: Pushbutton switches can be classified according to the way they are protected and how they are operated. It can be divided into open type and protected type, as well as waterproof type and anti-corrosion type, etc. And explosion-proof, knob-type, key-type, emergency-type, are also its ...

1. The wiring of the current transformer should not present problems, otherwise it will lead to failure to operate normally, and there may be damage to the transformer. In this case, the primary winding needs to be connected in series with the measurement circuit, and the secondary winding needs to be connected in series with all the loads. 2. Estimation ...