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DC Power Supply in a QFX5100 Device

The power supplies in QFX5100 devices (see Figure 1) are hot-removable and hot-insertable field-replaceable units (FRUs) that you can install in 1 U DC product SKUs of QFX5100 devices without powering off the device or disrupting the switching function.

The DC power supply in 1 U product SKUs of QFX5100 is 650 W with dual feeds for power resiliency. The DC power supply in the 2 U product SKU, QFX5100-96S, is 850 W with dual feeds for power resiliency. Both power supplies have a similar design. See Figure 1 for an example of the 1 U design and Figure 2 for an example of the 2 U power supply.

Figure 1: DC Power Supply in QFX5100 DevicesDC Power Supply in QFX5100 Devices
  1
Terminal block
  3
Ejector lever
  2
ESD grounding point
  4
Handle

To supply sufficient power for 1 U models, terminate the DC input wiring on a facility DC source that is capable of supplying a minimum of 7 A at –48 VDC.

Figure 2: DC Power Supply for QFX5100-96S DevicesDC Power Supply for QFX5100-96S Devices
  1
Terminal block
  3
Ejector lever
  2
ESD grounding point
  4
Handle
Note:

The DC power supply in the switch has four terminals labeled V-, V-, V+, and V+ (see Figure 3) for connecting DC power source cables labeled positive (+) and negative (–).

Figure 3: DC Power Supply Faceplate in QFX5100 DevicesDC Power Supply Faceplate in QFX5100 Devices
  1
Shunt negative input terminals (-48V)
  5
ESD grounding point
  2
Shunt positive input terminals (+RTN)
  6
Fault LED
  3
Terminal block
  7
Output LED
  4
Ejector lever
  8
Input LED

To avoid electrical injury, carefully follow instructions in Install and Remove QFX5100 Power Supplies.