Determine PA-7000 Series Firewall Power Configuration Requirements

The number of active power supplies required to operate a PA-7000 Series firewall depends on the power input that you connect to the power supplies (120VAC, 240VAC, or -48VDC), the number of Network Processing Cards (NPCs), and your power redundancy requirement.
To determine the number of active power supplies required to operate the chassis, refer to PA-7000 Series Power Supply Chart and locate your model and power input type and then locate the column that coincides with the number of installed NPCs. To provide full redundancy, install double the minimum number of power supplies specified in the table. A fully redundant power configuration means that half of the installed power supplies can fail and the chassis and installed NPCs will still function.
If you connect 120VAC power and you install five or six NPCs in a PA-7050 firewall or ten NPCs in a PA-7080 firewall, you can configure only partial redundancy. Full redundancy is not possible because the chassis do not hold twice the minimum number of active 120VAC power supplies required to power the chassis and the NPCs.
PA-7000 Series Power Supply Chart
Model and Power Input
NPCs Installed and Active Power Supplies Required
1 NPC
2 NPCs
3 NPCs
4 NPCs
5 NPCs
6 NPCs
7 NPCs
8 NPCs
9 NPCs
10 NPCs
PA-7050 Firewall 120VAC
2
2
2
2
3
3
-
-
-
-
PA-7050 Firewall240VAC or -48VDC
1
1
1
1
2
2
-
-
-
-
PA-7080 Firewall120VAC
2
2
3
3
3
4
4
4
4
5
PA-7080 Firewall 240VAC or -48VDC
1
1
2
2
2
2
2
2
2
3
For example, if you have a PA-7080 firewall with ten NPCs and configure it to use 240VAC or ‑48VDC, you must power on a minimum of three power supplies to power the chassis and all NPCs. For full redundancy, you must install and power on two power supplies in addition to the four that come with your chassis for a total of six active power supplies.
If one or more power supplies fail and there is not enough power to operate all installed NPCs, the firewall powers down NPCs starting from the highest NPC slot number to the lowest NPC slot number until the hardware power requirements no longer exceed the power that is still available to the chassis.
The power calculations used to provide the values in Example Chassis Power Output from a PA-7080 Firewall are based on the total output of each active power supply (1,200 watts with 120VAC input or 2,500 watts with either 240VAC or -48VDC input) minus the rated power consumption of all hardware components. You can find power information for hardware components in PA-7000 Series Firewall Component Electrical Specifications. To view power statistics on an active firewall, see View PA-7000 Series Firewall Power Statistics.
After you determine the power requirements for your firewall, see Connect Power to a PA-7000 Series Firewall and select the topic for your model and power type.

Recommended For You