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SRX3600 Services Gateway DC Power Supply Overview
In a DC power configuration, the services gateway contains two to four DC power supplies, located at the rear of the chassis in slots PEM0 through PEM3. Each power supply provides power to all components in the services gateway. When three or four power supplies are present, they share power almost equally within a fully populated system. The three or four DC power supplies provide power redundancy. If one power supply fails or is removed, the remaining power supplies redistributes the electrical load without interruption. The services gateway reassesses the power required to support its configuration and issues errors if the available power is insufficient.
Two types of DC power supply are available. The standard DC power supply has a maximum power output of 850 W. The enhanced DC power supply has a maximum power output of 1200 W, and also has additional filters required to meet NEBS and ETSI requirements. The two types of DC power supply are identical in all other respects.
 | Note: Mixing standard and enhanced DC power supplies within the same chassis is not supported. All installed DC power supplies must be either of standard or enhanced types. |
Figure 16: DC Power Supply
