Repeater segment 1, segment 2

Dears all,

I have one problem of segment 1 repeater.

The node after A1'B1' shows low voltage if i use the output segment 1 ( the length from output to next point in profibus network about 15m). Sometime the voltage drop so this point lost in a second

I try to change it to output A2'B2' segment 2, the voltage is higher than segment 1.

So somebody have any ideas about this situation. I dont understand why it is better in segment 2

The picture for your reference

Thanks for all answer

Hello,

I am using the repeater RS485, order code: 6ES7 972 - 0AA02 - 0XA0

The total length for segment 1 is 50m ( only one node)

Thank you

Hello,

Before changing to seg 2, i switch off the resistor termination for segment 1.

Now i change the profibus cable to segment 2 so i switch on the segment 1 and switch off the segment 2 A2'B2'

Thanks 

Dear,

As you can see in the picture, the segment 1 out put will connect to node 6 but the voltage is not high so sometime it lost communication in short time

Now i change it to segment 2 and the voltage is higher than the old one

The termination for segment 1 before changing is OFF, now is ON

The termination for segment 2 before changing is ON, now is OFF

Switch between 2 segment now is through OFF

I dont understand why i put it at segment 2 the voltage is higher than segment 1. I have 3 systems like this and all of them are the same

Thanks,

An