ADM483: RS-485/RS-422 Transceivers
I have an application that I use adm483 for serial communication beetween two devices.
The problem is that very often the adm483 burn and I dont understand the reason.
Both devices have common source 24V AC, and there is rectifier and switching power supply from DC 24V to 5V.
I watch carefully and I saw that the most of times that the adm483 is burned, is when I switch off the one device (cause I want remove mega8 for program update) as the second device is still powered.
Why adm483 is burned? I cant understand, any advice?