Dell Force10 S55T Quick Start Guide - Page 13

Step Task S55 Task S60 2 As soon as the cable is connected Attach the connectors to the both DC between the S55 and the power power units at the rear of the S60, source, the chassis is powered-up; making sure that the connection is there is no on/off switch. secure. 3 Replace the plastic cover over the DC connectors. 4 Turn the power switch on. Power Supplies The S55 and S60 chassis are designed to support two hot-swappable power supplies with integrated fans that provide the cooling for the chassis. There are two types of power supplies (AC or DC) and there are two air-flow directions (Normal and Reversed). Two power supplies are required for full redundancy, but each system will operate with a single power supply. • In the S55, a blank panel must be attached as redundant power supplies are not installed. • In the S60, one of the power supply bays can be equipped with a fan only module. WARNING: To prevent electrical shock, make sure the system is grounded properly. If you do not ground your equipment correctly, excessive emissions may result. Use a qualified electrician to ensure that the power cables meet your local electrical requirements. Fans The chassis come from the factory with the following: • The S55 comes with 1 power supply and 2 fan modules installed in the chassis. • The S60 comes with 1 power supply and 1 fan module installed in the chassis. Both the fan modules and the integrated fan-power supply are hot-swappable if a second (redundant) power supply is installed and running. With redundant power supplies, traffic will not be interrupted if a fan module is removed. Installing the Hardware 11