Chinese Electronic Load 500W module Sousim 500W

[BennoG]

For those who have communication problems. On my version the DC/DC converter for the isolated RS485 communication stopped working on my version (after power up it works for 5 seconds and then the DC/DC converter drops to 0V)

Pin 5 and 8 on U4 should have 5V dc. At the moment investigating how the DC/DC converter works.

Benno