How we can transmit & received data on 2 wire communication over 24 volt DC bus line

 

It's certainly possible to do but in order to come up with a functional method we really need to know more about what you are trying to accomplish.

Could you describe the problem you are trying to solve so we can help with the solution?

 

Do you mean while supplying a 24vdc load?

 

How we can transmit & received data on 2 wire communication over 24 volt DC bus line

like a telephone ?

 

Perhaps you should look up X10.

https://en.wikipedia.org/wiki/X10_(industry_standard)

 

Perhaps you should look up X10.

https://en.wikipedia.org/wiki/X10_(industry_standard)

Thanks for details.this details is help for home automation .we have problems with fire alarm products with 2 wire communication over 24 volt bus line for maximum distance of 1.5 km having one master & 250 slave
Thanks

 

What is the function of the 24V bus line? What does it power?
Is this an existing installation that is faulty or is this a quest for a new design?

 

What is the function of the 24V bus line? What does it power?
Is this an existing installation that is faulty or is this a quest for a new design?

24 volt DC supply is for supply of micro controller used for communication in slave PCB & for relay drive.
This is new system we are trying to develop
Thanks

 

24 volt DC supply is for supply of micro controller used for communication in slave PCB & for relay drive.
This is new system we are trying to develop
Thanks

Ok. You will not be able to send data on the 24V bus line easily.
For 1.5km use wireless.

 

Ok. You will not be able to send data on the 24V bus line easily.
For 1.5km use wireless.

You mean to say it is not possible.but this system is already available .we made hardware as per requirement but found data loss at time of communication for 1 meter range

 

I did not say it is not possible. I said it is not easy.
If you insist on wanting to do this then try increasing the source impedance of the power supply. Then you can modulate the 24V line with a 1-2V signal.

 

I am skeptical about whether this can be done. If I'm understanding this correctly, you're talking about a long distance (1.5km) and a large number of units (250) over a single line that also distributes power. It just seems like too much. You say "data loss at time of communication for 1 meter range " and you hope to achieve over a kilometer?