How to connect output and input without electromagnetic marking?

Normally, it is marked, it may be that your model is very old, so if this situation is not shown above, you can look for it later.

If the output and input are not clearly marked, this is more troublesome, because he can't figure out when the output is or when it is output.

The solution of the solenoid valve is still relatively simple, that is, there are only two input and output, you must not connect the wrong one, and it is dangerous to connect the wrong one.

There are no markings on the battery for inputs and outputs. You can distinguish based on basic basic common sense as well as your professional knowledge.

The coil of the excitation winding is relatively thin and the resistance value is larger, while the coil of the armature winding is thick and the resistance value is small.

If it can be disassembled, the appearance can be judged by the thickness and fineness of the coil.

If it cannot be taken apart, it can be distinguished by measuring the resistance value of the coil with a digital multimeter.

Look at the copper wire inside, the normal line is small is 220 input, and the thick line is output. Take a rough look at it like this, the red line is the input, the white line is the output, if you are not at ease, confirm it and then connect the power.

If there is no logo, he should have a manual, you can take a look, the manual.

If there is no logo on the electromagnetic, you can look at the logo of its audio cable when you input it after the end**.

Obviously, if it is a step-down, let the red line be the input end, the white line is the output end, if it is a career, then the white end is the input end, the red section will be the output end, the general step-down transformer is to make the input end thicker, the input line is due to the greater electrical pressure, so the wire diameter is thicker, and the red line is obviously thicker.

Use a multimeter to measure the resistance.

The group with the highest resistance is the input coil.

The other ones with less resistance are the output coils.

First of all, you have to make sure that this is a 220V power frequency step-down transformer, and then you can confirm the resistance of a high winding primary by measuring the resistance, if it is just an unknown transformer, it is not easy to say anything, if for the sake of research, you can still estimate the transformer power through the shape, estimate the power supply voltage and output voltage through the inductance and DC resistance of the winding, and then test and confirm the parameters.

Measure the resistance value, the large resistance value is connected to the high voltage, and the small resistance value is the low voltage winding.

On the premise that there is no multimeter, use a three-volt battery and a small three-volt bulb to thread the coils of the transformer into the battery circuit respectively. It is the secondary pole of the transformer that can make the small bulb glow, and the primary pole of the transformer that can make the small bulb glow dim or not emitted.

It should be red in and white out.

The output header is connected to the out, and the input header is connected to the in.

The output end is connected to the out, and the input end is connected to the in.

The power input on the cat is AC and the output is DC. Generally, the inside of the output DC head is the positive pole, and the outside is the negative pole.

Chargers produced by regular manufacturers will have parameter nameplates, not only marking the model, input and output voltage and current, but also various safety certifications and information such as the name and address of the manufacturer. Unless the parameters of the charger without parameters have been confirmed, the use may damage the electrical appliance, and if the voltage is greater than the input voltage of the electrical appliance, it will even cause serious consequences such as battery **, **, etc.

It must not be produced by a regular factory!

What electronic products come with, what electronic products can be used.

Your question is too general, and the answer on the 1st floor is too irresponsible, the input and output have their own signal regulations, and their own electrical interfaces cannot be connected casually. Many interfaces have their own definitions, and they are not matched or cannot be connected. However, some instruments use common interfaces, and you can't guarantee that all equipment manufacturers are in strict accordance with the standards to define the interface signal arrangement order.

You also have so many instruments, also expensive stuff. If it's a messy plug like a power supply, won't it break?

Supplementary answer: the lightning protector is generally connected in series, which device to protect, the output end is connected to which device, do not connect it in reverse, you want to protect the camera and connect the output end of the camera with the lightning protector, I think the lightning protector you bought should have a detailed manual, read it carefully The input end of the lightning protection device generally has a lightning protection device, if the lightning strikes, guide it through the lightning protection device to protect the output end, so don't connect it in reverse, otherwise there will be no protection, what input and output don't think too much, That depends on the direction of the signal, artificially prescribed

All equipment should be connected to the host, there is an input and output port on the host, fortunately, the signal connection will not damage the device, but it is not working, check it, change it, some machines, the input and output interfaces are different, and they can't be connected at all.

The same type of HDMI interface, the output and input definition and appearance are no different, mainly depending on the function of the chip on the motherboard behind the interface, output or input function.

The main thing is the denominator.

Mouth and public mouth, the public mouth generally appears on the connection line, and the graphics card, monitor, motherboard, and cast are suspicious of Li Yingyi.

and other equipment generally comes with the mother's family mouth is late.