CloudEngine 16816 Power Supply System

Overview

The CloudEngine 16816 supports DC, AC, and high-voltage DC power supply modes. The device can be connected to up to two power sources through power entry modules (PEMs). Each power module (PM) has two power inputs, and they convert the power supplied to the PEM to power the entire device.

• If only one power source is available in the equipment room, connect the PEM's terminal blocks or power sockets A1 to A20 or B1 to B20 to the power source.
• If two power sources are available in the equipment room:
  • In AC or high-voltage DC powered installation scenarios, you are advised to connect power sockets A1 to A20 to one power source, and power sockets B1 to B20 to the other power source. By default, power sockets A1 to A20 are in use, and B1 to B20 are on standby. If A1 to A20 fail to supply power, B1 to B20 take over. To prevent fluctuation of the two power supplies, the system does not switch back to power supply A immediately after power supply A recovers. Instead, it switches back to power supply A 4.5 hours later.
    If the power sources need to work in load balancing mode, connect as follows:

    • Connect power sockets A1 to A10 and B11 to B20 to one power source.
    • Connect power sockets A11 to A20 and B1 to B10 to the other power source.

  • In DC powered installation scenarios, connect terminal blocks A1 to A20 to one power source, and terminal blocks B1 to B20 to the other power source. If the two power sources have different voltages, the one with a higher voltage provides a higher current.
  • In AC and high-voltage DC powered installation scenarios, the 220 V AC power supply is used by default. If the 220 V AC power supply fails, the system automatically switches to the high-voltage DC power supply.
• Requirements for the power supply system of a customer's cabinet: The output power of two power sources must be greater than the maximum input power of the device.

Components

As shown in Figure 4-19, the power supply units of the CloudEngine 16816 are located at the top of the chassis. The power supply units are PMs and power switches at the front of the chassis, and a PEM at the rear of the chassis. Table 4-17 describes the functions of each unit.

Figure 4-19 Power supply units of the CloudEngine 16816

PM and PEM Applications

The CloudEngine 16816 supports multiple power supply scenarios, which vary according to the installed PEM and PMs. Table 4-18 describes the power supply scenarios and PEM/PM applications.

PM and PEM Application Principles

The PEM is integrated into the chassis and does not need to be configured onsite. Do not attempt to remove or install the PEM onsite. PMs can be configured based on the chassis's overall power consumption, providing flexible power supply.

DC PMs and AC & high-voltage DC PMs of the CloudEngine 16816 can work in N+1 redundancy mode, in which N indicates the number of PMs configured based on the chassis's actual power consumption. The maximum power supply capability of one chassis is equal to the sum of the maximum output power of N PMs installed in the chassis. In N+1 redundancy mode, N PMs supply power to the chassis, and one PM works as a backup.

Taking a DC PM with 2200 W output power is used as an example, if PMs are configured according to the N+1 redundancy mechanism (that is, one PM is added on top of the number of required PMs), the value of N x 2200 W must be greater than the chassis's power consumption, as described in Table 4-19.

Taking an AC & high-voltage DC PM with 3000 W output power is used as an example, if PMs are configured according to the N+1 redundancy mechanism (that is, one PM is added on top of the number of required PMs), the value of N x 3000 W must be greater than the chassis's power consumption, as described in Table 4-20.

If PMs are not fully configured, connect power cables only to power sockets of PEMs with corresponding PMs installed, and retain filler panels in PM slots with no PMs installed.

Power Supply Architecture

• DC power supply

  The CloudEngine 16816 must be equipped with two DC PEMs. Each PEM has 20 terminal blocks, every 10 of which are connected to one power source. Each DC PM has two inputs, each of which comes from one power source in the equipment room. The DC PM converts the power and outputs the power to the power backplane, allowing the two power sources to back up each other. Figure 4-20 shows the DC power supply architecture of the CloudEngine 16816.

  Figure 4-20 DC power supply architecture of the CloudEngine 16816
  
• AC & high-voltage DC power supply

  The CloudEngine 16816 must be equipped with two AC & high-voltage DC PEMs. Each PEM has 20 power sockets, every 10 of which are connected to one power source. Each AC & high-voltage DC PM has two power inputs, each of which comes from one power source in the equipment room. The AC & high-voltage DC PM converts and outputs the power to the power backplane, allowing the two power sources to back each other up.

  The CloudEngine 16816 can be directly connected to a power source or indirectly connected one through a power distribution unit (PDU). Directly connecting a device to a power source uses cable connections similar to those in the DC power supply mode, and is not described here. The following describes the power supply architecture in the scenario where a device is indirectly connected to a power source through a PDU.

  CloudEngine 16800 series switcheses provide two types of PDUs:

  • AC PDU: Each AC PDU provides one power input and six power outputs.
  • High-voltage DC PDU: Each high-voltage DC PDU provides two power inputs and eight power outputs. Each input corresponds to four outputs.

  AC, high-voltage DC, and AC & high-voltage DC hybrid power supplies are supported. Figure 4-21, Figure 4-22, and Figure 4-23 show the power supply architectures of the three modes.

  Figure 4-21 AC power supply architecture of the CloudEngine 16816
  
  Figure 4-22 High-voltage DC power supply architecture of the CloudEngine 16816
  
  Figure 4-23 AC & high-voltage DC hybrid power supply architecture of the CloudEngine 16816