Srx5600 Chassis - Juniper SRX5600 Hardware Manual

provide full power redundancy. If one power supply fails or is removed, the remaining power supplies
instantly assume the entire electrical load without interruption. Three power supplies provide the
maximum configuration with full power for as long as the device is operational.
In the high-line (220 V) AC power configuration, the device contains two or four AC power supplies
located horizontally at the rear of the chassis in slots PEM0 through PEM3 (left to right). Each AC power
supply provides power to all components in the device. When two or more power supplies are present,
they share power almost equally within a fully populated system. Four AC power supplies provide full
power redundancy. If one power supply fails or is removed, the remaining power supplies instantly
assume the entire electrical load without interruption. Two power supplies provide the maximum
configuration with full power for as long as the device is operational.
In the DC configuration, two power supplies are required to supply power to a fully configured device.
One power supply supports approximately half of the components in the device, and the other power
supply supports the remaining components. The addition of two power supplies provides full power
redundancy. If one power supply fails or is removed, the remaining power supplies instantly assume the
entire electrical load without interruption. Two power supplies provide the maximum configuration with
full power for as long as the device is operational.
Cooling system—The cooling system has redundant components, which are controlled by the host
subsystem. If one of the fans fails, the host subsystem increases the speed of the remaining fans to
provide sufficient cooling for the services gateway indefinitely.

SRX5600 Chassis

IN THIS SECTION
SRX5600 Services Gateway Chassis | 29
SRX5600 Services Gateway Physical Specifications | 31
SRX5600 Services Gateway Midplane Description | 32
SRX5600 Services Gateway Cable Manager Description | 33
SRX5600 Services Gateway Craft Interface Overview | 34
SRX5600 Services Gateway Craft Interface Alarm LEDs and Alarm Cutoff/Lamp Test Button | 35
SRX5600 Services Gateway Craft Interface Host Subsystem LEDs | 36
SRX5600 Services Gateway Craft Interface Power Supply LEDs | 37
SRX5600 Services Gateway Craft Interface Card OK/Fail LEDs | 37
SRX5600 Services Gateway Craft Interface Fan LEDs | 37
28