Manage power connections efficiently with the Juniper Networks 645 Watt DC Power Supply, designed for use with the Juniper Networks SRX650 Services Gateway. The SRX650 Services Gateway uses either one AC or one DC power supply unit (PSU). A second PSU is optional (sold separately) and can be used to meet power requirements exceeding the wattage provided by a single PSU in a nonredundant configuration, by using two power supplies in a system using more power than a single PSU provides. A second AC or DC power supply can be used with its matching type of power supply to provide redundancy and load-sharing to the services gateway and its components. If one power supply fails or is removed, the remaining power supply 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. Do not mix AC and DC power supplies within the same services gateway. Damage to the device might occur. All power supplies are hot-swappable and support single or dual redundant power supply versions. Each power supply is cooled by the system’s fans. The SRX650 is a mid-range dynamic services gateway that consolidates network infrastructure and security applications for regional offices, large branch offices, and small to medium enterprises. The services gateway provides cost-effective, scalable integration of routing, security, and other mid-range applications for these sites. This power supply is compatible with SRX600 and SRX500 series devices.