[CA11] c95 to existing ST1 daisy chain

I have a loop of existing ST1 chain entering and exiting my pedestal connecting an ST80 Masterview and ST80 AP keypad... I thought that connecting a c95 was going be a simple plug and play with a conversion cable and something like as ST1 junction plock to spur off for the MFD... (previous MFD not network connected?)

Apparently that's not the case??? I need to depower the ST1 chain, and power a converter E22158??? Do I need to restore the chain at the pedestal somehow?

I don't mind another method be it 0183/2000/etc... I just need the MFD to display tridata, and control an AP waypoint...

Thank You!
HS