Dell Force10 S60-44T Installing the S60 System - Page 27

4 Power Supplies The S60 system is designed to support two hot-swappable power supply units (PSUs) with integrated fans that provide the cooling for the system. There are two types of power supplies (AC or DC) and there are two airflow directions (normal and reverse). Two PSUs are required for full redundancy, but the system will operate with a single PSU. You can equip one of the PSU bays with a fan-only module. For the procedure to replace only a fan module or fan filter, refer to Chapter 5, Fans and Filters. You can order the S60 system as an empty chassis or with either AC power (Figure 4-1) or DC power (Figure 4-2). Both PSU types are field replaceable. When running with full redundancy (two PSUs installed and running), you can remove and replace one PSU while the other PSU is running without disrupting traffic. WARNING: To prevent electrical shock, ensure the S60 system is grounded properly. If you do not ground your system correctly, excessive emissions may result. Use a qualified electrician to ensure that the power cables meet your local electrical requirements. WARNING: Electrostatic discharge (ESD) damage can occur if the components are mishandled. Always wear an ESD-preventive wrist or heel ground strap when handling the S60 system and its components. Components The following power supply options are available for the S60 system: • AC power supply with integrated fans (Catalog# S60-PWR-AC) • AC power supply with integrated reverse flow fans (Catalog# S60-PWR-AC-R) • DC power supply with integrated fans (Catalog# S60-PWR-DC) • DC power supply with integrated reverse flow fans (Catalog# S60-PWR-DC-R) Figure 4-1. AC Power Supply Securing Screw Fans and Filters PSU0 Grab Handle PSU1 AC Power Connector Power Supplies | 27