13 Dell PowerEdge R220 Technical GuideChassis featuresTable 4 lists the features on the R220 chassis. For additional information, see theDell PowerEdgeR220 Owner’s Manual on Dell.com/Support/Manuals.Chassis featuresTable 4.Feature DescriptionPower button and indicator ACPI-complaint power button with an integrated green power LEDFront bezel Covers the system’s front-loading hard drives; can be locked to preventhard drives from being removedNMI buttonRecessed non-maskable interrupt (NMI) button used to troubleshootsoftware and device driver errors; use only if directed to do so byqualified support personnel or by the operating system's documentationSystem identification button Buttons on the back and front of a system to help identify the unit in adata center environmentInformation tag Slide-out label panel for recording system informationUSB connectors Up to five USB ports connect USB devices to the systemVideo connector Connects a monitor to the systemLCD control panelDisplays system ID, status information, and system error messages; twonavigation buttons to scroll through the menu on the LCD and one selectbuttonvFlash media reader Supports one vFlash media card; functionality is activated only wheniDRAC Enterprise is enabledHard drive bays Up to 2 x 2.5” or 2 x 3.5”Hard drive activity LEDs Indicate the status and activity of the hard drivesOptical drive (optional) Supports optional DVD drives; see the Storage sectionVideo connector One connector on front panel for rack mountPCIe slot One PCIe x16 3.0 slotPower supply unit Non-redundant, 250W, auto-ranging (100V~240V)Power supply indicators Indicate whether system has powerNIC indicators Indicate network activity and statusEthernet connectors Choice of network connectors through the Select Network AdapterfamilySerial connector Connects a serial device to the systemiDRAC7 Enterprise port Dedicated management port for optional iDRAC7 Enterprise