NETBOTZ 750 have data loss from multiple POD 150

[German_Camey]

Hello, I have a problem. I have installed 8 POR 150 in cascade to a NETBOTZ 750, the first 5 POD 150 have communication and send the data collected by the sensors (The A-Links are between 100 meters or 328 ft), however, After that distance, the following 150 PODs present different problems such as:

1- POD 6# disconnected (all sensors appear disconnected and are not disconnected )

2- POD 8# appears connected but many of the sensors do not appear connected

I thought it was a wiring problem but I certified each cable used 2 times to be sure but that was not the problem.

I used 3 APC power supplies for the POD150s at diferent distances but I can't solve the problem

please a need help