IBM DCS9550 1S1 manual The Plug-in Modules, Power Supply/Cooling Module

Introduction

1.2 The Plug-in Modules

An DCS9550 1S1 Storage Expansion Unit requires one or more of the following modules for normal operation:

1.2.1Power Supply/Cooling Module

Two auto ranging AC 450WPower Supply/Cooling modules (Figure 1–4) are supplied mounted in the rear of the enclosure as part of the subsystem core product.

Figure 1–4AC Power Supply/Cooling Module

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PSU voltage operating ranges are nominally 115V or 230V AC, selected automatically.

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Four LEDs mounted on the front panel of the Power Supply/Cooling module (see Figure 2–1) indicate the status of the PSU and the fans.

1.2.1.1Multiple Power Supply/Cooling Modules

The DCS9550 1S1 Storage Expansion Unit must always be operated with two Power Supply/Cooling modules fitted. The two Power Supply/Cooling modules operate together so that if one fails the other maintains the power supply and cooling while you replace the faulty unit.

Module replacement should only take a few minutes to perform but must be completed within 10 minutes from removal of the failed module.

IBM System Storage DCS9550 1S1 Storage Expansion Unit Installation, Service, and User Guide 3