Whether the servo 24v pulse signal power supply is pLc or an external switching power supply

It is best to use the power supply of the PLC, the premise is that the PLC has a 24V power output (such as Mitsubishi), the analog ground and digital ground of the servo must be connected with the 0V of the PLC, and at the same time, the shielded wire and the grounding wire should also be connected together.

If an external power supply is used, the common line of the PLC should be connected with the common line of the servo (generally 0V) and the common line of the switching power supply, so that the voltage difference between the three parties can be consistent and reduce interference.

As long as the PLC has an output of 24V, it is resolutely not possible to use the switching power supply to lead the electricity, otherwise if the other parallel 24V of the switching power supply has a problem, it will affect the pulse signal of the servo motor, resulting in the motor running around and other situations to damage the motor.

What PLC are you using

Curious about your PLC, if there is an internal 24V power supply, how do you connect the external power supply??

And the PLC output point can have 24V points, I'm more curious, and the knowledge in the school is really small. . .

The main thing is that I am afraid that the power is not enough to drive external devices.

Generally, the external power supply is directly used, and the internal power supply is really not enough.

It is better to have a separate power supply for the pulse output.

If you are afraid of overcurrent of the power supply, add a switching power supply.

Each model is not exactly the same, but it is not recommended to use its own power supply, it is recommended to use an external power supply, because it is expensive in itself, and the external one is cheap, and it can achieve the same effect as itself, and it is easy to replace.

The power output of the PLC itself is very small, so it is generally not used! Unless you can use a small sensor! Generally, an external switching power supply is used!

Are you talking about a modular power supply? Schneider PLC is divided into small PLC such as (TWIDO) and medium such as (M340), small PLC has an external 24V power supply, and for medium PLC it is powered by a rack, I hope it can help you.

Each model is not exactly the same, it is best to go to the official website to see the parameters of that model, very complete.

If a servo motor is used, the encoder of the servo drive can output pulses to the PLC, absolute or incremental encoder, but the PLC must be equipped with the corresponding receiving module.

Yes, it's not the same connection, I don't have a manual, you can check it yourself, there are several pulse wiring methods, you can also use PLC's 24V series resistance, many stepper controllers are connected like this. The internal or external wiring of the power supply is just different!

The power supply of the servo drive can be output to the drive by an external switching power supply, PLC output pulse frequency and control direction.

24V is OK, but generally a 2K resistor is added.

The pulse is generally a 5V square wave, and 24V is generally a power supply control relay to the output port.

You have to check the manual of the servo amplifier, each servo amplifier has an input impulse voltage range, if it is exceeded, it is easy to damage the servo amplifier.

Depending on the parameters of the server, some are 12 volts and need to add a current limiting resistor.

Oh. Two independent bodies ... It's not a matter of two things.

Because it is easy to interfere, it is not common ground if it is isolated.

Anti-jamming, the servo input itself is opto-isolated, what is the point of using a power supply to isolate?

This is not necessarily, if the background harmonics of the grid are very strong, it may cause the servo to lose pulses, and vice versa, it will not.

Doing so avoids zero drift. The previous interference may be caused by zero drift, and the normal factory grounding system should include a part of the work protection ground and lightning protection grounding, and the other is that the control system is separately grounded copper plate. Make sure that the 0V of the 24V signal does not drift, if the 0V signal drifts, then your analog signal will be affected and drift, resulting in abnormal operation, such as the given inverter and the 4-20mA output such as the regulating valve may be affected.

If severe, the quantity may also be affected and malfunction. So you're doing the right thing.

Is the ground where the signal is triggered the switching power supply?

As long as the switching power supply capacity permits, the 24V switching power supply can be used both for the PLC and as a switching power supply at the same time.

Yes, but it should be noted that the power of the 24V switching power supply is not to meet the requirements of PLC and other equipment, and the total power of the equipment that needs to be powered by the 24V switching power supply cannot be greater than the maximum power of the 24V switching power supply.