SRX5600 Services Gateway DC Power Configurations

In the DC power configuration, the device contains either two or four DC power supplies located at the rear of the chassis in slots PEM0 through PEM3 (left to right). You can upgrade your DC power system from two to four power supplies.

Four power supplies provide full redundancy. If a DC power supply in a redundant configuration is removed or fails, its redundant power supply takes over without interruption. The DC power supply in PEM2 serves as redundant to the DC power supply in slot PEM0, and the DC power supply in PEM3 serves as redundant to the DC power supply in slot PEM1. If only two DC power supplies are installed, they must be installed in slots PEM0 and PEM1 or in slots PEM2 and PEM3.

Table 20: Power Supply Redundancy and Power Distribution

DC Power Supply SlotRedundant Power Supply Power Supply Provides Power to the Following Components

PEM0

PEM1

Fan tray, IOC or SPC slots 0 and 1, and SCB slots 0 and 1

PEM1

PEM0

Fan tray, IOC or SPC slots 0 and 1, and SCB slots 0 and 1

PEM2

PEM3

Fan tray and IOC or SPC slots 2 through 5

PEM3

PEM2

Fan tray and IOC or SPC slots 2 through 5

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