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    DC Power Supply in the NSM4000 Appliance

    An NSM4000 appliance ships with a single AC power supply module. However, you can use a DC power supply, shown in Figure 1, to power the appliance.

    Note: While it is possible to provide redundancy in the NSM4000 appliance using a combination of AC and DC power supply modules, we recommend that you do not provide redundancy in this manner. Instead, use two DC power supply modules or two AC power supply modules if you want to provide redundancy.

    Figure 1: DC Power Supply Module

    DC Power Supply

    Table 1 shows details of the DC power supply module for an NSM4000 appliance.

    Table 1: Details of a DC Power Supply Module



    Model number


    Field-Replaceable Unit type

    Cold-swappable, if the appliance has only one power supply module

    Hot-swappable, if the appliance has an additional redundant, functioning power supply module that is plugged into a separate power circuit

    Power supply weight

    2.60 lb (1.18 kg)


    One internal fan per power supply module


    From the front of the chassis to the back

    Power Supply Module (Status) LED

    One Power Supply Module LED present on the power supply faceplate:

    • Green indicates that the power supply module is working properly; the module is powered on and is powering the appliance.
    • Amber indicates that the power supply module is in standby mode; the module is powered on but it is not powering the appliance.
    • Off indicates that the power supply module is not powered on or that the module is not working properly.

    Maximum Output Power

    560 W

    DC Maximum Current

    20 A

    DC Power Module

    –45 V to –60 V

    DC Power Supply Peak inrush

    < 60 A

    Power Module Maximum Efficiency

    80Plus 560 W cDC

    Published: 2014-10-30