CloudEngine Series Switches FAQs-3.2 Power Module

Created Sep 30, 2017 19:11:45Latest reply Sep 30, 2017 19:12:13 989 1 0 0

3.2  Power Module

3.2.1  How Do I Configure Power Modules for the CE Series Switches?

CE12800

Power redundancy modes for the CE12800 series switches

Power modules in a CE12800 series switch can work in N+N backup, N+1 backup, or N+0 mode. To ensure power reliability, it is recommended that you use the N+N backup mode and connect the power modules to two power supply systems. In this way, the switch will not be powered off or restart if one power supply system fails.

ab5bd40435c24606badff3f7c65c8d21 NOTE:

N is the number of power modules configured based on actual power consumption of a chassis. The maximum power capacity of the system is the total maximum output power of N power modules.

  • N+N backup: N power modules supply power for the chassis, and N power modules work as backup to implement power redundancy.
  • N+1 backup: N power modules supply power for the chassis, and one power module works as backup to implement power redundancy.
  • N+0 (no backup): N power modules supply power for the chassis, and no power module works as backup.

The CE12800 series switches do not support the PoE function.

Power module configuration modes for the CE12800 series switches

Configuration of power modules varies depending on the power redundancy mode:

  • In N+N backup mode, power module (PM) slots in the chassis are divided into area A and area B, and power modules in the two areas work as a hot backup for each other, as shown in Slot layout in the CE12804 chassis, Slot layout in the CE12808 chassis, Slot layout in the CE12812 chassis, Slot layout in the CE12816 chassis, Slot layout in the CE12804S chassis, Slot layout in the CE12808S chassis, Slot layout in the CE12804E chassis, Slot layout in the CE12808E chassis, and Slot layout in the CE12804E chassis. To use the N+N backup mode, install N power modules in the PM slots in area A, and the other N power modules in the PM slots in area B. For example, to use the 4+4 backup mode in a CE12812 chassis, install four power modules in any four slots among PM1, PM2, PM5, PM6, PM9, and PM10, and the other four power modules in any four slots among PM3, PM4, PM7, PM8, PM11, and PM12.
  • In N+1 backup or N+0 mode, power module slots are not divided into two areas for backup, and N+1 or N power modules can be installed in any PM slots. However, you are advised to install (N+1)/2 or N/2 power modules in area A and the other power modules in area B. (Here, area division used in the N+N backup mode is mentioned only for convenience of description. Actually, area A and area B do not back up each other.) If N+1 or N is an odd number, the redundant one can be installed in either area A or area B.
    • For example, to use the 6+0 mode in a CE12812 chassis, you are advised to install three power modules in any three slots among PM1, PM2, PM5, PM6, PM9, and PM10, and the other three power modules in any three slots among PM3, PM4, PM7, PM8, PM11, and PM12.
    • To use the 6+1 backup mode in a CE12812 chassis, you are advised to install four power modules in any four slots among PM1, PM2, PM5, PM6, PM9, and PM10, and the other three power modules in any three slots among PM3, PM4, PM7, PM8, PM11, and PM12. Alternatively, install three power modules in any three slots among PM1, PM2, PM5, PM6, PM9, and PM10, and the other four power modules in any four slots among PM3, PM4, PM7, PM8, PM11, and PM12.

CE8800&7800&6800&5800

The CE8800&7800&6800&5800 series switches have two power module slots, in which pluggable power modules can be installed to provide power to the chassis. A chassis can use one or two power modules. Double power modules can provide higher reliability.

The CE8800&7800&6800&5800 series switches support double power modules working in 1+1 backup mode.
  • When both power modules are working normally, each of them provides half of the power required for the chassis.
  • When one power module fails, the other one provides all power required for the chassis.
ab5bd40435c24606badff3f7c65c8d21 NOTE:
  • If only one power module is installed in a switch, the switch generates power module absence alarms for the idle power slots.
  • Failure of a single power module does not affect operations of the switch but will degrade the reliability of the switch.
All power modules are hot swappable. The CE8800&7800&6800&5800 series switches do not support the PoE function.
ab5bd40435c24606badff3f7c65c8d21 NOTE:
Power modules in a chassis must have the same power and same heat dissipation method.

3.2.2  What Types of Power Modules Do CE12800 Series Switches Support?

ab5bd40435c24606badff3f7c65c8d21 NOTE:

Power modules of the CE12800 series switches are hot swappable. After you remove a power module from the chassis, wait at least 30 seconds before installing it back into the chassis.

8131b10ce85e4003869823e4f062d6a9 NOTICE:
  • AC&high-voltage DC power modules that receive AC power inputs can be used together with AC power modules in a chassis.
  • In other cases, AC, DC, and AC&high-voltage DC power modules cannot be used together in a chassis.

Table 3-6 lists the CE12804/CE12808/CE12812/CE12816/CE12804S/CE12808S switch product and version support for various power modules.

Table 3-6  CE12804/CE12808/CE12812/CE12816/CE12804S/CE12808S switch product and version support for power modules

Power Module Name

CE12804 Chassis

CE12808 Chassis

CE12812 Chassis

CE12816 Chassis

CE12804S Chassis

CE12808S Chassis

PAC-2700WA

NOTE:

This module will not be recommended since January 2017.

A maximum of 4 power modules supported in an AC chassis or an AC&high-voltage DC chassis, not supported in a DC chassis

NOTE:

This power module is supported in V100R001C00 and later versions.

A maximum of 8 power modules supported in an AC chassis or an AC&high-voltage DC chassis, not supported in a DC chassis

NOTE:

This power module is supported in V100R001C00 and later versions.

A maximum of 12 power modules supported in an AC chassis or an AC&high-voltage DC chassis, not supported in a DC chassis

NOTE:

This power module is supported in V100R001C00 and later versions.

A maximum of 20 power modules supported in an AC chassis or an AC&high-voltage DC chassis, not supported in a DC chassis

NOTE:

This power module is supported in V100R003C00 and later versions.

Not supported

Not supported

PDC-2200WA

A maximum of 4 power modules supported in a DC chassis, not supported in an AC or AC&high-voltage DC chassis

NOTE:

This power module is supported in V100R002C00 and later versions.

A maximum of 8 power modules supported in a DC chassis, not supported in an AC or AC&high-voltage DC chassis

NOTE:

This power module is supported in V100R002C00 and later versions.

A maximum of 12 power modules supported in a DC chassis, not supported in an AC or AC&high-voltage DC chassis

NOTE:

This power module is supported in V100R002C00 and later versions.

A maximum of 20 power modules supported in a DC chassis, not supported in an AC or AC&high-voltage DC chassis

NOTE:

This power module is supported in V100R003C00 and later versions.

A maximum of 4 power modules supported in a DC chassis, not supported in an AC&high-voltage DC chassis

NOTE:

This power module is supported in V100R005C00 and later versions.

A maximum of 8 power modules supported in a DC chassis, not supported in an AC&high-voltage DC chassis

NOTE:

This power module is supported in V100R005C00 and later versions.

PHD-3000WA

A maximum of 4 power modules supported in an AC chassis or an AC&high-voltage DC chassis, not supported in a DC chassis

NOTE:

This power module is supported in V100R005C00 and later versions.

A maximum of 8 power modules supported in an AC chassis or an AC&high-voltage DC chassis, not supported in a DC chassis

NOTE:

This power module is supported in V100R005C00 and later versions.

A maximum of 12 power modules supported in an AC chassis or an AC&high-voltage DC chassis, not supported in a DC chassis

NOTE:

This power module is supported in V100R005C00 and later versions.

A maximum of 20 power modules supported in an AC chassis or an AC&high-voltage DC chassis, not supported in a DC chassis

NOTE:

This power module is supported in V100R005C00 and later versions.

A maximum of 4 power modules supported in an AC&high-voltage DC chassis, not supported in a DC chassis

NOTE:

This power module is supported in V100R005C00 and later versions.

A maximum of 8 power modules supported in an AC&high-voltage DC chassis, not supported in a DC chassis

NOTE:

This power module is supported in V100R005C00 and later versions.

Table 3-7 lists the CE12804E/CE12808E/CE12816E switch product and version support for various power modules.
Table 3-7   CE12800E series switch product and version support for power modules

Power Module Name

CE12804E Chassis

CE12808E Chassis

CE12816E Chassis

PAC3000S54

A maximum of 4 power modules supported in the chassis

NOTE:

This module is supported in V200R002C50 and later versions.

A maximum of 8 power modules supported in the chassis

NOTE:

This module is supported in V200R002C50 and later versions.

A maximum of 10 power modules supported in the chassis

NOTE:

This module is supported in V200R002C50 and later versions.

PDC2200S54-CB

A maximum of 4 power modules supported in the chassis

NOTE:

This module is supported in V200R002C50 and later versions.

A maximum of 8 power modules supported in the chassis

NOTE:

This module is supported in V200R002C50 and later versions.

A maximum of 10 power modules supported in the chassis

NOTE:

This module is supported in V200R002C50 and later versions.

3.2.3  What Are Specifications of AC Power Cables for the CE Series Switches?

CE12800

The AC power cables applicable to the CE12800 series switches depend on the type of power sockets used in your equipment room. Two types of AC power cables are available to suit different power sockets: PDU power cable and country-specific power cable.

  • PDU power cables are delivered with a power distribution unit (PDU) with C20 straight sockets. A PDU power cable has a C19 straight female connector at one end and a C20 straight male connector at the other end, as shown in Figure 3-21.
  • Country-specific power cables are delivered in compliance with standards of the destination country or region. For example, AC power cables used in China have PI angle male connectors, as shown in Figure 3-22.

If PDUs with C20 straight sockets are available in a cabinet, use PDU power cables complying with local standards.

If there is no PDU with C20 straight sockets in a cabinet, use power cables specific to the country or region where the switch is used.

Figure 3-21  PDU power cable and PDU
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Figure 3-22  China-specific power cable and power strip
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Connection

An AC power cable transmits AC power to a chassis and allows maximum current of 16 A. An AC power cable is connected in the following way:

  • The C19 straight female connector is connected to a socket on the power distribution unit at the rear of the CE12800 chassis.
  • The country-specific connector or C20 straight male connector at the other end is connected to an external power outlet.

CE8800&7800&6800&5800

AC power cables applicable to the CE8800&7800&6800&5800 series switches include PDU power cables (C13 straight female to C14 straight male) and country-specific power cables (C13 straight female to PI straight male). The two types of AC power cables differ in the connector used to connect to the power outlet.

  • 150 W/350 W/600 W AC power modules: The AC power sockets or directly connected circuit breakers must have a current rating of 10 A.
  • 350 W DC power modules: The directly connected circuit breakers must have a current rating of 16 A.
  • 600 W/1200 W AC&240 V DC power modules: The AC power sockets or directly connected circuit breakers must have a current rating of 10 A.
  • 600 W/1200 W high-voltage DC power modules: The directly connected circuit breakers must have a current rating of 10 A.
ab5bd40435c24606badff3f7c65c8d21 NOTE:

When 110 V power input is provided to a 1200 W AC&240 V DC power module, the AC power socket or directly connected circuit breaker must have a current rating of 16 A.

If a switch uses two power modules for 1+1 power redundancy, the superior circuit breaker for the power distribution box or PDU to which the power modules are connected must have a current rating of 25 A.

The AC power cables delivered with a switch must comply with the standards used in the delivery destination.

3.2.4  Do Power Modules for the CE Series Switches Have a Power Switch?

CE12800

Power modules for the CE12804/CE12808/CE12812/CE12816/CE12804S/CE12808S switch does not have a power switch. There are two power switches on the front panel of the chassis to control power supply to the chassis (except the CE12804S). It is recommended to turn on both switches to power on the device. Both switches must be turned off to power off the device.

Power modules for the CE12804E/CE12808E/CE12816E switch have a power switch.

CE8800&7800&6800&5800

Some power modules for the CE8800&7800&6800&5800 switches have a power switch, as listed in Table 3-8.

Table 3-8  Power modules for the CE8800&7800&6800&5800 series switches

Power Module

Have Power Switch

PAC-150WAYes
ES0W2PSA0150Yes
PAC-350WA-BYes
PAC-350WA-FYes
PDC-350WA-BNo
PDC-350WA-FNo
PAC-600WA-BYes
PAC-600WA-FYes
PAC-600WB-BNo
PAC-600WB-FNo
PHD-600WA-BNo
PHD-600WA-FNo
PAC-1K2WA-BNo
PAC-1K2WA-FNo
PHD-1K2WA-BNo
PHD-1K2WA-FNo

3.2.5  What Are Possible Causes of Power Module Alarms on the CE Series Switches?

A power module reports alarms in the following conditions:

  1. The power module fails to provide normal output due to environmental factors. For example, the power module is not connected to any external power source, the environment temperature is too high, or the input voltage is too high or too low. Alarms generated in this condition are sent to the network management system. When such an alarm is reported, you can fix the environmental problem to enable the power module to work normally.
  2. The power module has a fault that cannot be automatically rectified. For example, fans in the power module fail, internal components of the power module overheat, or a fuse is burnt. When such an alarm is reported, send the power module to Huawei or Huawei agent for repair.
  3. Software of the power module does not work normally. For example, software load has not completed. When such an alarm is reported, upgrade software of the power module.

Power Module Indicators of CE12800 Series Switches

Table 3-9 lists the indicators on 2700 W AC and 3000 W AC&high-voltage DC power modules and describes the meaning of each indicator state.

Table 3-9  Description of indicators on the 2700 W AC and 3000 W AC&high-voltage DC power modules

Indicator

Color

Description

Input

Green

  • Steady on: The input power of the power module is in the normal range.
  • Blinking: The input voltage is out of the normal range.
  • Off: The power module receives no input power.

Output

Green

  • Steady on: The output power of the power module is in the normal range.
  • Off: The power module provides no output power.

Alarm

Red

  • Off: The power module is working normally.
  • Steady on: The power module has failed. Possible causes include internal short circuit, fan failure, output overvoltage, overtemperature-triggered shutdown, communication failure, and severely uneven current.

Table 3-10 lists the indicators on a 2200 W DC power module and describes the meaning of each indicator state.

Table 3-10  Description of indicators on a 2200 W DC power module

Indicator

Color

Description

INPUT

Green

  • Steady on: The input power of the power module is in the normal range.
  • Blinking: The input voltage is out of the normal range.
  • Off: The power module receives no input power.

OUTPUT

Green

  • Steady on: The output power of the power module is in the normal range.
  • Off: The power module provides no output power.

ALARM

Red

  • Off: The power module is working normally.
  • Steady on: The power module has failed. Possible causes include internal short circuit, fan failure, output overvoltage, overtemperature-triggered shutdown, communication failure, and severely uneven current.

Power Module Indicator of CE8800&7800&6800&5800 Series Switches

Table 3-11, Table 3-12, Table 3-13, Table 3-14, and Table 3-15 describe the indicator on AC, DC, and high-voltage DC power modules of the CE8800&7800&6800&5800.

Table 3-11  Indicator on 150 W (PAC-150WA)/350 W/600 W AC power modules

Indicator

Color

Description

STATUS: running status indicator

Green

  • Off: The AC power input is abnormal (for example, no input, overvoltage, or undervoltage) or the AC power output is abnormal (for example, overvoltage, overcurrent, short-circuit, or overtemperature).
  • Steady on: The power module is working normally.
Table 3-12  Indicator on a 150 W (ES0W2PSA0150) AC power module

Indicator

Color

Description

STATUS: running status indicator

Green

  • Off: The power input is abnormal (for example, no input, overvoltage, or undervoltage) or the power output is abnormal (for example, undervoltage or overtemperature).
  • Steady on: The power module is working normally.
  • Blinking: The power output is abnormal (for example, output overvoltage, overcurrent, or short circuit).
Table 3-13  Indicator on a 350 W DC power module

Indicator

Color

Description

STATUS: running status indicator

Green

  • Off: The DC power input is abnormal (for example, no input, overvoltage, or undervoltage) or the DC power output is abnormal (for example, overvoltage, overcurrent, short-circuit, or overtemperature).
  • Steady on: The power module is working normally.
Table 3-14  Indicator on the 600 W/1200 W AC&240 V DC power module

Indicator

Color

Description

STAT: running status indicator

-

Off: The power module receives no power input.

Green

  • Steady on: The power module is working normally.
  • Blinking: The power module is in loading or standby state, or the power cable has been connected but the power module is not installed in the switch.

Red

Steady on:
  • Fans of the power module fail.
  • The power module is in overtemperature protection state.
  • The power input is abnormal (input undervoltage or input overvoltage).
  • The power output is abnormal (output overcurrent, output short-circuit, or output overvoltage).
Table 3-15  Indicator on the 600 W/1200 W high-voltage DC power module

Indicator

Color

Description

STAT: running status indicator

-

Off: The power module receives no power input.

Green

  • Steady on: The power module is working normally.
  • Blinking: The power module is in loading or standby state, or the power cable has been connected but the power module is not installed in the switch.

Red

Steady on:
  • Fans of the power module fail.
  • The power module is in overtemperature protection state.
  • The power input is abnormal (input undervoltage or input overvoltage).
  • The power output is abnormal (output overcurrent, output short-circuit, or output overvoltage).

3.2.6  Do Power Modules in a Switch Have Any Requirement on Input Voltage Fluctuation?

Power modules used on CE series switches are independent of each other. You only need to ensure that the input voltage of each power module fluctuates within the specified range and do not need to care about differences in the voltage phases or amplitudes of different power modules.

3.2.7  Does a 3000 W AC&High-Voltage DC Power Module Support AC Power Input?

A 3000 W AC&high-voltage DC power module supports 220 V/110 V AC power input and 240 V DC input, and provides 53.5 V DC/3000 W output.

ab5bd40435c24606badff3f7c65c8d21 NOTE:

When AC power supply is used and the input voltage is lower than or equal to 175 V AC, the rated output power reduces to 1500 W.

3.2.8  Are Power Modules and Fan Modules of CE8800&7800&6800&5800 Series Switches Interchangeable?

Power modules and fan modules of CE8800&7800&6800&5800 series switches are not interchangeable. A switch must use the power modules and fan modules matching its model. Table 3-16 lists the power modules and fan modules applicable to different CE8800&7800&6800&5800 models and version support for these modules.

8131b10ce85e4003869823e4f062d6a9 NOTICE:

If the CE8800&7800&6800&5800 switches use power modules that do not match their product models, the switches generate an alarm and may be powered off due to power shortage.

When the power module and fan module use forcible heat dissipation, they must use the same airflow method. For example, if the power module with back-to-front airflow is used, the fan module with back-to-front airflow must be used. Type-B power modules can only be used with type-B fan modules and cannot be used with type-F fan modules.

Table 3-16  Applicable power modules, fan modules, and version support

Series

Model

Power ModuleFan Module
CE8800

CE8860-4C-EI

1200 W AC&240 V DC power modules:
  • PAC-1K2WA-B (P means power module and AC means alternating current; B means back-to-front airflow, air exhaust on power module panel.)
  • PAC-1K2WA-F (F means front-to-back airflow, air intake on power module panel.)
  • FAN-180A-B
  • FAN-180A-F
1200 W high-voltage DC power modules:
  • PHD-1K2WA-B
  • PHD-1K2WA-F

CE8850-32CQ-EI

600 W AC power modules:
  • PAC-600WA-B
  • PAC-600WA-F
  • FAN-40HA-B
  • FAN-40HA-F
CE7800

CE7850-32Q-EI

CE7855-32Q-EI

600 W AC power modules:
  • PAC-600WA-B
  • PAC-600WA-F
  • FAN-40HA-B
  • FAN-40HA-F
CE6800

CE6850-48S4Q-EI

350 W AC power modules:
  • PAC-350WA-B
  • PAC-350WA-F
  • FAN-40EA-B
  • FAN-40EA-F
350 W DC power modules:
  • PDC-350WA-B (DC means direct current)
  • PDC-350WA-F

CE6850-48T4Q-EI

350 W AC power modules:
  • PAC-350WA-B
  • PAC-350WA-F
NOTE:
600 W AC power modules are recommended for the CE6850-48T4Q-EI of V100R002C00 or a later version.
  • FAN-40EA-B
  • FAN-40EA-F
600 W AC power modules:
  • PAC-600WA-B
  • PAC-600WA-F

CE6850-48S6Q-HI

CE6850U-48S6Q-HI

CE6850-48T6Q-HI

CE6855-48T6Q-HI

CE6850U-24S2Q-HI

600 W AC&240 V DC power modules:
  • PAC-600WB-B
  • PAC-600WB-F
  • FAN-060A-B
  • FAN-060A-F
600 W high-voltage DC power modules:
  • PHD-600WA-B
  • PHD-600WA-F

CE6810-48S4Q-EI

CE6810-48S4Q-LI

CE6810-48S-LI

CE6810-32T16S4Q-LI

CE6810-24S2Q-LI

CE6851-48S6Q-HI

CE6855-48S6Q-HI

350 W DC power modules:
  • PDC-350WA-B
  • PDC-350WA-F
  • FAN-40EA-B
  • FAN-40EA-F
600 W AC power modules:
  • PAC-600WA-B
  • PAC-600WA-F

CE6860-48S8CQ-EI

CE6870-24S6CQ-EI

CE6870-48S6CQ-EI

CE6880-24S4Q2CQ-EI

CE6880-48S4Q2CQ-EI

350 W DC power modules:
  • PDC-350WA-B
  • PDC-350WA-F
  • FAN-40HA-B
  • FAN-40HA-F
600 W AC power modules:
  • PAC-600WA-B
  • PAC-600WA-F

CE6870-48T6CQ-EI

CE6880-48T4Q2CQ-EI

600 W AC power modules:
  • PAC-600WA-B
  • PAC-600WA-F
  • FAN-40HA-B
  • FAN-40HA-F
CE5800

CE5850-48T4S2Q-EI

CE5850-48T4S2Q-HI

150 W AC power module: PAC-150WA
  • FAN-40EA-B
  • FAN-40EA-F
350 W DC power modules:
  • PDC-350WA-B
  • PDC-350WA-F

CE5810-24T4S-EI

CE5810-48T4S-EI

150 W AC power module: PAC-150WA
  • FAN-40SB-B
  • FAN-40SB-F
350 W DC power modules:
  • PDC-350WA-B
  • PDC-350WA-F

CE5855-48T4S2Q-EI

CE5855-24T4S2Q-EI

150 W AC power module: ES0W2PSA0150
  • FAN-040A-B
  • FAN-040A-F
350 W DC power modules:
  • PDC-350WA-B
  • PDC-350WA-F

3.2.9  What Are Differences Between PM and PEM?

Differences between PM and PEM are:

  • A PM is a power module used to supply power to the equipment. Figure 3-23 shows the appearance of a PM.

    Figure 3-23  PM appearance
    a5bf1a600405462597d09aebab17aff8
  • A PEM is the power entry module on the chassis, an iron frame that provides power inputs to PMs and provides other functions such as wave filtering. Generally, a PEM is included in the chassis sales part. Figure 3-24 shows the appearance of a PEM.

    Figure 3-24  PEM appearance
    a9a9e03265ae4ea9a39253d7fefed029

3.2.10  How Do I Calculate the Number of Power Modules Required in a CE12800 Switch?

The Hardware Configuration Tool helps you quickly calculate the number of power modules required in a CE12800 switch. The calculator is also integrated in the UniSTAR system.

You can also use the following formula to calculate the number of power modules required:

Minimum number of power modules required = Sum of maximum power consumption of all working modules in the switch/Maximum power of a single power module (integral part of the result) + 1

For example, a CE12808 switch uses 2700 W AC power modules and is configured with two CE-CMUAs, five CE-SFU08As, two CE-MPUAs, and two CE-L48XS-EC line cards. Based on the power consumption values of the cards provided in the "Cards" section of the CloudEngine 12800 Series Switches Hardware Description and the power consumption of the chassis (including fans) and power modules, the sum of maximum power consumption of all modules can be obtained: 2519 W. Therefore, a minimum of one 2700 W power module is required.

To ensure power reliability of a CE12800 switch, it is recommended that you use the N+N backup mode with double power supply systems so that the failure of a single power supply system will not cause power failure or restart of the switch. In the preceding example, the 1+1 backup mode is recommended.

3.2.11  Do CE Series Switches Support High-Voltage DC Power Supply?

China's national standard for high-voltage DC power supply was released in December 2011 and took effect in February 2012. The standard defines power supply with 240 V DC (192 V to 288 V). The International Electrotechnical Commission (IEC) released the 380 V DC (260 V to 400 V) power supply standard, ETSI EN 300 132-3-1 V2.1.1, in February 2012. Because the two standards were released not long ago and define different voltage ranges, power supply manufacturers have not released power supply products complying with the high-voltage DC power supply standards. All the manufacturers use AC power modules in 240 V DC power supply scenarios.

CE series AC chassis modules can work in a certain high-voltage DC voltage range. For security purpose, power modules of the switches provide overvoltage protection function and will cut off power supply when the input voltage exceeds the upper limit. The voltage protection function prevents damage to power modules or other dangers caused by abnormal input voltage. The voltage upper limit triggering overvoltage protection is larger than the maximum input voltage allowed by a power module.

The 240 V DC input standard has higher requirements for power module protection components and secure distance than the 220 V AC input standard. Current, AC power modules can work with 240 V DC power input.

3.2.12  Are CE Series Switches Required to Use Matching Power Modules?

CE series switches must use matching power modules. Using unmatched power modules may cause unexpected risks. The chassis and power modules adopt foolproof designs to prevent misuse of power modules.

For the mapping between CloudEngine chassis models and power modules, see the "Power Module" section in the Hardware Description.

3.2.13  What Are the Differences Among N+0, N+1, and N+N Backup Modes of Power Modules?

In the N+1 backup mode, N power modules provide power supply, and one power module acts as a backup. If one power module fails, the redundant power module provides power supply to ensure normal operations of the switch.

In the N+N backup mode, N power modules provide power supply, and N power modules act as backups. Even if all the N primary power modules fail, the N redundant power modules can still ensure normal operations of the switch.

In the N+0 mode, N power modules provide power supply, and no redundant power module is available. If one power module fails and the total output of the other power modules is smaller than the actual power consumption of the switch, the switch cannot run normally.

3.2.14  Can a CE12808 Switch Be Configured with Four Power Modules in the 2+2 Backup Mode?

The 2+2 power module configuration is supported as long as the output power of the power modules is sufficient for the switch.

3.2.15  Are Power Cables and Power Modules of CE Series Switches Hot Swappable?

All power modules of CE series switches are hot swappable.

All power cables are hot swappable if they are connected to matching power modules.

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WoodWood  Admin   Created Sep 30, 2017 19:12:13 Helpful(0) Helpful(0)

CloudEngine Series Switches FAQs-3.2 Power Module
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