Does anyone know if X20BM11 is usable with X20PS3300 or must it be used with X20BM01?
To my understanding, the difference between BM01 and BM11 is that BM01 only supply to right side of the I/O supply while BM11 supplies to both directions.
In the illustration given in the Redundancy User’s Manual, it seems like when PS33x0 had failed, I/O power would not be able to flow from PS9400 towards the X20 IO Modules because there is no connection on BM01 to pass power from the left side.
From my understanding this is not the idea.
X20PS3300 should only be used with X20BM01 / 05.
The redundancy you are mentioning is regarding X2X Link supply.
X2X Link and IO supply are separated.
So, I guess the above-mentioned concept only works if the Bus Controller does not have any I/Os at all. imagine the use case where you use a Bus Controller with I/O with this supply redundancy, it pretty much fully relies on the PS3300 staying up because failure of PS3300 would anyhow cause the system to stop working (loss of I/O power) despite the X20PS9400 still functioning. Might as well just stick with a single slice of PS9400.
In the above sample, the PS9400 is for the supply of the buscontroller.
The PS3300 is for the supply of the following IOs.
So while the IO cards would still communicate over X2X because X2X link supply is redundant, when the PS3300 would fall down, there is no I/O power, IOs would not work anymore and e.g. a digital outputs of a DO module would not switch anymore.
But you would get feedback of the IO modules missing the IO supply.
