Do You want use two power supply?
and what IE-3000 modules you use?
also you want AC power or DC?
Just the IE-3000-8TC. One power supply is enough. But onsite there is only 120AV source available.
So what is the best power option.
As per datasheet and installation, we can connect power from a separate DC power source on network cabinet directly to the power connectors on switch and its not necessary to order seperate power supply PWR-IE50W-AC.
Details shown in below link. Pls check below link and confirm if its ok.
We may add 8T expansion modules later.
Yes, you can use existing DC power source.
What DC power available on your cabinet ? (Voltage and available current)