Determine Power Requirements of the PA-7500 Series Firewalls
Use this reference to learn how to configure your PA-7500 Series Firewall to best
meet its power requirements.
The AC and DC power supplies support two ranges of voltages: low line (90V, 110/120V,
132V) and high line (180V, 200/240V, 305V). Depending on the input voltage, the power
supply will support 1800W (for low line) and 3600W (for high line). The input voltage
range determines the number of power supplies needed for the chassis. A chassis with low
line input voltage requires a minimum of eight power supplies while a chassis with high
line input voltage requires a minimum of four power supplies.
The minimum number of power supplies (four for high line and eight for low line) are
not enough to establish full power redundancy in a fully loaded chassis.
To provide full redundancy using high line power supplies, you must install eight
power supplies. A fully redundant power configuration means that half of the
installed power supplies can fail and the appliance and all installed line cards
still function.
