About Power Supplies

The Sun Blade 8000 Series uses hot-pluggable power supply modules to supply the required power to the system components. The Sun Blade 8000 Chassis supports six power supplies; the Sun Blade 8000 P Chassis supports four power supplies.

The power supply modules are not interchangeable between the Sun Blade 8000 Chassis and the Sun Blade 8000 P Chassis.

The power supply modules monitor their fault status and control their Service Action Required LEDs independently of the fault management software running on the Chassis Monitoring Module (CMM). For information about the types of faults that can occur on the power supplies, see Power Supply Faults. For the location and function of the power supply indicators, see About Power Supply Indicators.

This topic includes the following sections:

To calculate power consumption:

Power Supply Features

Feature

Description

Number of power supply modules

Chassis specific:

  • Sun Blade 8000 Chassis – 6 power supply modules installed at the front of the chassis.

  • Sun Blade 8000 P Chassis – 4 power supply modules installed at the front of the chassis.

Output

Each power supply module supplies 3000W at 48V for a combined power output of 9000W.

Input

Each power supply requires a dedicated 200-240V 20A (16A international) circuit.

Frequency

50-60 Hz

Current

16A per AC input

Connection to AC inlet

Sun Blade 8000 Chassis:

  • Americas Domestic – NEMA L6-20P to IEC320-C19; 13 ft (4m); Sun part number X5044A-Z

  • International – IEC309 to IEC320-C19; 13 ft (4m); Sun part number X5045A-Z

  • Preinstalled in a rack with a power distribution unit – IEC320-C20 to IEC320-C19; 4.9 ft (1.5m) Sun part number X5046A-Z; 6.5 ft (2m) Sun part number X5047A-X

Sun Blade 8000 P Chassis:

  • Americas Domestic – NEMA L6-20P to IEC320-C19; 13 ft (4m); Sun part number X5074A-Z

  • International – IEC309 to IEC320-C19; 13 ft (4m); Sun part number X5075A-Z

  • Preinstalled in a rack with a power distribution unit – IEC320-C20 to IEC320-C19; 4.9 ft (1.5m) Sun part number X5076A-Z; 6.5 ft (2m) Sun part number X50477-X

Power System Overview

The chassis must have a minimum of three operating power supplies to support a system load. The total system power load is equally divided among the number of operating power supplies. A single 48V bus distributes power from the power supplies to the midplane connectors. The power supplies have integrated fans powered from the 48V bus and those fans contribute to system cooling. Therefore, the power supplies must remain within the chassis even when the power supply is not powered on.

On the rear of the Sun Blade 8000 Chassis are six AC power inlets. On the rear of the Sun Blade 8000 P Chassis are four AC power inlets. One independent AC inlet is associated with each power supply. The system requires a 200-240 VAC, 20A (16A international) circuit to each power inlet.

Each power supply has four status indicator LEDs: Ready-to-Remove, Service Action Required, DC-OK, and AC-OK. For the location and a description of these LEDs, see About Power Supply Indicators.

The time taken from administrative notification of a failed (redundant) power supply module to power supply module replacement can be unlimited, enabling you to replace the power supply module at your convenience. During this time the system operates normally, but without the redundancy benefit of the failed power supply module.

Power Distribution

Power is distributed through the single 48V shared power bus to power the Server Modules (blades), fan array, and Network Express Modules. The power supplies also provide a 12V standby power rail, which is used to power the Chassis Monitoring Modules (CMMs). The 12V standby power is active, and therefore so are the CMMs, whenever one or more power supplies are receiving power. This enables the CMMs to control the main chassis 48V power.

For example, you can configure the CMM so that on resumption of AC power after a power loss, the CMM can either keep the chassis off or power on the chassis automatically. Similarly, Server Modules can be software configured via their local service processors to either turn on automatically with the chassis, or to wait for a specific power-on command. For more information, see CMM Power-On Policy and Blade SP Power-On Policy.

In addition, as blades, I/O modules, and other components of the system with power control are plugged in, the CMM will verify that there is sufficient power in the system prior to enabling power to those components.

Power Configurations

The Sun Blade 8000 Series power supplies can be configured as follows:

  • Sun Blade 8000 Chassis – N+N grid redundant configuration

  • Sun Blade 8000 P Chassis – N+1 power supply redundant configuration

With an N+N power supply configuration, the Sun Blade 8000 Chassis supports full grid redundancy. Grid redundancy refers to the performance of the chassis power subsystem in the intended AC configuration. For grid redundancy, the AC configuration is supplied AC from two independent feeds, which can be called Line A and Line B. With the Sun Blade 8000 Chassis, by connecting three power supplies to the Line A feed and three power supplies to the Line B feed, the system can tolerate the failure of up to three power supplies, or the complete loss of either AC power feed.

The Sun Blade 8000 P Chassis supports N+1 power supply redundancy. A minimum of three operating power supplies are required to support a fully configured system without N+1 power supply redundancy.