48U enclosure for high-density environments
Designed for high-density data centers where floor space is at a premium, the Dell™ PowerEdge™ 4820 rack enclosure offers enhanced power management, efficient cooling and simplified component storage and mounting for a wide range of IT equipment.
- Power distribution: Integrated trays offer toolless mounting for vertical power distribution units (PDUs)
- Cooling: Front and rear doors with 80% perforation allow air to flow smoothly
- Cable management: Three sizes – standard, wide and deep – provide the right space to route cables for every need
Exceedingly Strong and SecureWith a static load rating of 2,500 lbs and three sizes to choose from, the PowerEdge 4820 rack enclosure can provide the capacity you need to hold a full complement of data center equipment.
- Standard (4820): 600mm wide x 1070mm deep
- Wide (4820W): 750mm wide x 1070mm deep
- Deep (4820D): 600mm wide x 1200mm deep
Stabilizer feet, included with the rack, attach to the front and sides of each 4820 rack enclosure for increased stability. Interconnect kits are available to link adjacent rack enclosures.
Lockable side panels and front and rear doors provide security for data centers, remote offices, wiring closets, factory floors and other server environments.
Important PDU Mounting FeaturesIn addition to U-space PDU mounting, the PowerEdge 4820 rack enclosure has specially designed trays inside the rear doors to easily mount vertical PDUs, without using any tools, so they won't interfere with air circulation. The wide design of the 4820W moves the PDU trays even farther away from the rack’s frame, which reduces interference with installed equipment and cables.
Dell vertical-mount PDUs are available in a number of sizes and can be combined within a rack. The trays in the standard (4820) and wide (4820W) racks can hold up to four full-height or eight half-height units, while the deep (4820D) rack trays can accommodate twice as many.
A Bundle of Cable-Management Options
Each of the three PowerEdge 4820 sizes accommodates servers with deep chassis dimensions while allowing space for cable management. The large open base and removable side panels offer more options for cable access.
Made to Stay CoolThe PowerEdge 4820 rack is designed to facilitate better airflow. The front and rear doors are 80 percent perforated, and flexible air dams help keep hot air from moving from the back to the front, alleviating a problem common in many racks. Dell’s wide rack enclosure employs extended air dams across the front to help ensure proper airflow containment. Available blanking panels can further manage airflow for unused U-space in the rack.
For hot-aisle/cold-aisle thermally efficient data center topologies, the standard rack enclosure fits on two standard floor tiles, in a space two feet wide and four feet deep. The 4820W rack is slightly wider, and the 4820D rack is slightly deeper. Space planners can select the form factor that best meets data center needs.
Infrastructure for the Efficient Enterprise
For data center efficiency, Dell offers a range of accessories to help you further improve power management, enhance airflow and ease component mounting. Additional options include a rack fan, an equipment shelf and a 1U KMM (keyboard/monitor/mouse) console.
Dell provides several options for cable management that can be used separately or together, depending on your specific needs.
The vertical cable manager (VCM) can be installed in the rear power distribution unit (PDU) tray of the Dell PowerEdge™ xx20 racks (or many third-party racks that use the same button-mount keyhole spacing), occupying the width of a single vertical PDU. The VCM kit also has alternate mounting holes and ships with screws to allow installation along the rear EIA-standard posts in the 750 mm wide Dell rack enclosures.
The VCM has two 18U sections, which allows you to easily place it in various locations within the PDU tray, wherever you need it, even in a 24U rack. The VCM finger spacing correlates to the rack U spacing, and the metal cover snaps into place on the fingers to contain and conceal your cables.
The horizontal crossover panels, also called lacing bars, are compliant to the EIA-310 specification and are available in two heights, 1U and 2U. They have several types of attachment point options, including mounting locations for metal cable rings, hook-and-loop straps with a twist connector and other accessories that use the rectangular twist connectors, such as claw hooks. The accessories can be mounted to either side of the crossover panel, which can be installed in the front or back of any EIA-310 compliant rack.
The metal cable rings can be installed in the PDU trays in the Dell rack or attached to the horizontal crossover panels. Six of these rings are provided with the hardware kit shipped in each Dell rack and this kit of 10 rings provides additional cable management support within the rack.
A separate kit of 10 hook-and-loop straps with twist connectors provides a quick and easy way to secure cables snugly against the sides of the rack. These straps can also be connected to the horizontal crossover panels to tightly bundle cables crossing from one side of the rack to the other.
Dell offers closeout filler panels, also called blanking panels, in a variety of sizes and materials to fit in the Dell PowerEdge racks as well as other EIA-310 compliant racks. Closeout filler panels are attached to the front of unused rack space and are designed to improve air flow to the installed equipment and reduce hot air recirculation to the front of the rack. Using closeout filler panels helps implement data center best practices that can lead to an important common goal: creating the coldest possible intake temperature with the highest possible volume of chilled air plus the warmest possible exhaust temperature.
Plastic closeout filler panels are available in 1U and 2U sizes and provide quick and tool-less snap-in installation for square-hole racks.
Steel closeout filler panels provide support for more types of racks, with tooled installation for square, round or threaded holes. Multiple sizes are available in 1U, 2U, 3U or 6U increments to optimize your coverage. For threaded-hole racks, hardware with #10–32 threads is provided.
|Single pack||1U, 2U||1U, 2U, 3U, 6U|
|10 pack||1U, 2U||1U, 2U|
Rack fans can be mounted on the top of the Dell 4 x 20 racks to help move air through the perforated canopy. Regional models are available for 120V, 208V and 230V operation.
The 1U fixed-equipment shelf provides multiple options for rail attachment in a variety of 4- and 2-post racks, supporting a loaded weight capacity of 200 pounds (90.7 kg). The heavy-duty steel shelf also includes slots to facilitate cable management and two hook-and-loop straps to secure cables.
Interconnect kits (also referred to as baying or ganging kits) allow you to connect two Dell racks of the same height. It is possible to connect racks of different depths, in addition to connecting PowerEdge xx20 racks to the previous generation of xx10 racks.
Grounding kits provide a set of wires and fasteners to bond the rack’s removable components to the frame for a common ground. Dell rack enclosures offer a bonding point (or grounding stud) on each of the doors, sides and other removable components, and all bonding points on the enclosure should be connected to the rack frame. The wires provided with grounding kits are sized and labeled to fit with specific components — refer to the instructions for proper connection.