Echo relay panel and 8 zone foundry minipanel general assistance!

1. Does the 4 button scene control, vacancy sensors and echo touch display need external power supplies or does the erp and minipanel support those directly with dmx? Only have few of each devices. 

2. Can the touch display and other input devices be put on the same DMX daisy chain and is a wire from final field device required back to panel (loop)? 

3. It appears the design has the minipanel and relay panel as separate systems however if they are interconnected together is a single pair between panels all that is required or will a loop be necessary? 

4. I will just be pulling the lo volt cabling and doing line voltage power so I am trying to clarify all that is needed and gain better understanding of the system and cabling/termination requirements.

I look forward to your responses and appreciate the help!!