How to Calculate D7038 & DS9484 NAC Output

[#1]

Question - How can the NAC's of the D7038 panel have an output @ 2.5 amps when the panel only has 6 amps of total NAC power?

Answer - You have a total of 6 amps output maximum,  you can drive any one NAC is 2.5 amps.

If you drive NAC 1 at 2.5 amps, you only have 3.5 amps left to operate devices on the remaining 3 NAC circuits.