DI Redundancy.
If there are two ISO1228 for DI Inputs which located different box and the source of DI are same (single source)
The equipment are normally good working.
Suddenly, one equipment power is off (ISO1228 AVCC 24V) then How can I estimate the other equipment(the 24V Power source is same) DI status?
P.S
I would like to know about DI inputs impedance at power off of ISO1228 AVCC 24V.
Best regards.
Hwang.