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DEFENDER™ Server Cabinets

DEFENDER™ server cabinets are an efficient, self-contained cooling system ideal for use in remote locations, wiring closets, office locations, and industrial environments that don’t have cooling infrastructure already in place.

Capable of providing up to 4 kW of cooling, these cabinets with NEMA rated air conditioners protect the delicate electronics inside from heat, dirt, moisture, and tampering. Simply put, these cabinets are a cost-effective alternative to installing a data center with a climate-controlled cooling system.

One Stop Shopping.

We selected the most common sizes and paired them with the most common accessories. We call them “Pre-Configured” cabinets. Call us and we can process your order immediately – 507-287-3535.

Need a Custom Air Conditioned Cabinet?

We offer design services and solutions to meet the needs of any product specification. You can count on our expert resources and engineering capabilities to support any stage of your project, from concept to production. Contact us with your requirement today.

Features

Server Cabinet Features

  • Welded 12-gauge steel frame
  • Fully gasketed locking front door with viewing window
  • Fully gasketed locking rear door
  • 19″ EIA Square hole rails can accept Rackstuds™
  • Gland plate in top for cable entry/exit
  • Brushed grommet cable entry/exit in bottom
  • Works with GapFill™ airflow management accessories, as well as a variety of PDUs
  • Remote monitoring capability

Specifications

  • Welded 12-gauge steel frame
  • Rails have square holes with EIA 310-D spacing

Paint / Finish

  • Color: Select from one of nine proprietary color options. Sample kits are available upon request.
  • Our products are finished in textured powder paint. Powder coating provides a durable high-quality finish.

Load Rating

  • Static Load Rating: 2000 lbs. [907 kg.]
  • A cabinet has a static load when:
    • It is in its final, permanent, fully secured location, and
    • Its load is uniformly applied to the two sets of rack-mounting rails
  • Never move a cabinet with its maximum static load applied

Industry Standards

  • EIA 310-D

AC Unit Features

  • Designed to mount on the side of the enclosure while maintaining NEMA 12, 3R, 4, or 4X integrity.
  • Digital temperature controller with alarm
  • 120V standard 230V Optional
  • Built-in condensate evaporator
  • Efficient, quiet, long lasting rotary compressor
  • Environment friendly HFC refrigerant
  • Easy pull-out filter
  • UL listed

FAQ

How to determine the size of AC unit (BTU’s) needed?

Follow these steps. Contact us if needed.

  • Take the nameplate power specified of each component (in WATTS) to be installed in the cabinet and add them up.
  • Reduce (de-rate) by 30%.
  • OPTIONAL – If more components will be added in the future add a 20% safety factor.
  • Multiply total WATTS by 3.41 to convert to BTU’s.

EXAMPLE
You have the following components: QTY 20 – 1U servers at 150 WATTS each. QTY 2 – 5U switches at 200 WATTS each.

  • 3400 WATTS Total
  • De-rate by 30% (3400 WATTS = 2380 WATTS)
  • Add 20% for future expansion (2380 x 20% = 2856 WATTS)
  • Multiply by 3.41 to get BTU’s (2856 x 3.41 = 9,738 BTU’s)
    In this example a 12,000 BTU AC unit is recommended*

*Assumptions – Room size is larger than 12’ x 12’ x 12’.  Ambient temperature is 85 °F


How to manage the condensate?

The AC unit will not produce condensate if properly installed. These AC units utilize a closed loop system where moisture, if created, is evaporated inside the AC unit itself.

Because this is a closed loop system, there is no need to vent this system.


How does it ship?

The cabinet ships on a pallet. The AC unit ships securely inside of the cabinet. A loading dock is required for standard shipment. Special accommodations can be made for a lift gate or inside delivery.

Double check the overall dimensions of the cabinet to make sure the path from the delivery location to installation location is clear. Make sure it will fit under, and through (width wise), all doorways and/or in elevators.


How to install the AC unit on the cabinet?

The right side of the cabinet (left side mounting upon request) is pre-configured to accommodate the AC unit. Un-box the AC unit, apply the gasket material, and lift into place. Two people are required to lift the AC unit into place. All hardware is included.

You may need to mount the AC unit AFTER you put the cabinet in the designated location.


What are the power requirements?

A dedicated circuit is required. 20 AMP is preferred, but 15 AMP may be sufficient based on the size of the AC unit. Consult a licensed electrician to determine if you have appropriate power running to the location where the cabinet will be installed.


How to get cables into the cabinet?

Communication cables should come through the top. The top of this cabinet allows terminated cables to drop in through the sliding top cover. Before starting to populate, be sure to check the service loop length is long enough.

Once closed, the compressible memory foam sheets, with a fire and chemical retardant impregnated throughout the material, seals off the top to eliminate airflow leaks. Max opening is 15.25″ wide x 19.50″ deep.

Pre-Configured

Full Rack – Self-contained Cooling Server Cabinet Systems

Includes: Frame, 2 Pair Square Hole Rails, Window Door on Front, Solid Door on Rear, Gasket Top Panel, Bottom, Casters, Levelers, and 120 V Ice Cube AC Unit. 230 Volt AC unit available.

12,000 BTU Part Number Rack Units
DC-40U2442-AC12000-D 40U
DC-40U2436-AC12000-D 40U
8,000 BTU Part Number Rack Units
DC-40U2442-AC8000-D 40U
DC-40U2436-AC8000-D 40U

 

Half Rack – Self-contained Cooling Server Cabinet Systems

Includes: Frame, 2 Pair Square Hole Rails, Window Door on Front, Solid Door on Rear, Gasket Top Panel, Bottom, Casters, Levelers, and 120 V Ice Cube AC Unit. 230 Volt AC unit available.

8,000 BTU Part Number Rack Units
DC-28U2442-AC8000-D 40U
DC-28U2436-AC8000-D 40U
6,000 BTU Part Number Rack Units
DC-28U2442-AC6000-D 40U
DC-28U2436-AC6000-D 40U
3,000 BTU Part Number Rack Units
DC-28U2442-AC3000-D 40U
DC-28U2436-AC3000-D 40U

Product Type

Preconfigured

Used Where

Requires Rear Attach Point

Style

Material

Finish

Details

Sold As

Fits Rail to Rail Setting

U

Side Flange Style

Usable Space Front

Usable Space Rear

Usable Space Top

Usable Space Bottom

Usable Space Slope

Door Structure

Fits Frame Depth

Fits Frame Height

Max Usable Space Width

Max Usable Space Depth

Adds to Overall Height

Adds to Overall Width

Adds to Overall Depth

Fasteners Required

Overall Height

Overall Width

Overall Depth

Weight Load Capacity

Wedge Degree

CFM

dBA

Volts

kW

Amps

Phase

Recepticals

Plug Type

Cord Length

Airflow Direction

Locking

Hinge Side

Number of Monitors

Range of Motion

Mounting Hardware Included

Requires Paint

Requires Laminate

Laminate

Paint Color

Shipping Weight

UL Listed

RoHS Compliant

REACH Compliant

EIA Standard

MIL Standard

Meets Attenuation Levels

Seismic Compliance

DEFENDER™ Server Cabinets Compatible Parts

Select Part Number Description Files Product Type Preconfigured Used Where Requires Rear Attach Point Style Material Finish Fits Rail to Rail Setting EIA Width U Front Flange Style Side Flange Style Usable Space Front Usable Space Rear Usable Space Top Usable Space Bottom Usable Space Slope Door Structure Fits Frame Depth Fits Frame Height Fits Frame Types Max Usable Space Width Max Usable Space Depth Adds to Overall Height Adds to Overall Width Add to Overall Depth Fasteners Required Overall Height Overall Width Overall Depth Weight Load Capacity Wedge Degree CFM dBA Volts kW Amps Phase Recepticals Plug Type Cord Length Airflow Direction Locking Hinge Side Number of Monitors Range of Motion Mounting Hardware Included Requires Paint Requires Laminate Laminate Paint Color Shipping Weight UL Listed RoHS Compliant REACH Compliant EIA Standard MIL Standard Meets Attenuation Levels Seismic Compliance Website Description Ships Contents Catalog Brochure Technical Drawing
CMA-001-C
459281
Velcro Cable Ties (20 pk) Cable Manager Accessory Style C [Universal] STP Cable Management Internal No Velcro Any Yes No (Not Painted) No No Yes Yes EIA-310-D No
DC-28U2436-AC3000-D
461620
Pre-Configured DEFENDER Air Conditioned Server Cabinet - 28U, 19" EIA HxWxD = [56.00" x 30.34" x 38.88"] [1422mm x 770mm x 988mm] Includes: Frame, 2 Pair Square Hole Rails, Window Door on Front, Solid Door on Rear, Gasket Top Panel, Bottom, Casters, Levelers, Ice Cube 3,000 BTU AC Unit, 120 V STP Preconfigured Cabinet 1 No 19 28 56 30.34 38.88 2000 lbs. Static Load Yes (Select Color) No No No No No Pre-Configured DEFENDER Air Conditioned Server Cabinet - 28U, 19" EIA, 3000 BTU AC Ships fully assembled. AC Unit Inside of Cabinet Frame, 2 Pair Square Hole Rails, Window Door on Front, Solid Door on Rear, Gasket Top Panel, Bottom, Casters, Levelers, Ice Cube 3,000 BTU AC Unit, 120 V
DC-28U2436-AC6000-D
461647
Pre-Configured DEFENDER Air Conditioned Server Cabinet - 28U, 19" EIA HxWxD = [56.00" x 34.34" x 38.88"] [1422mm x 872mm x 988mm] Includes: Frame, 2 Pair Square Hole Rails, Window Door on Front, Solid Door on Rear, Gasket Top Panel, Bottom, Casters, Levelers, Ice Cube 6,000 BTU AC Unit, 120 V N/A Preconfigured Cabinet 1 No 19 28 56 34.34 38.88 2000 lbs. Static Load Yes (Select Color) No No No No No Pre-Configured DEFENDER Air Conditioned Server Cabinet - 28U, 19" EIA, 6000 BTU AC Ships fully assembled. AC Unit Inside of Cabinet Frame, 2 Pair Square Hole Rails, Window Door on Front, Solid Door on Rear, Gasket Top Panel, Bottom, Casters, Levelers, Ice Cube 6,000 BTU AC Unit, 120 V
DC-28U2436-AC8000-D
461649
Pre-Configured DEFENDER Air Conditioned Server Cabinet - 28U, 19" EIA HxWxD = [56.00" x 34.34" x 38.88"] [1422mm x 872mm x 988mm] Includes: Frame, 2 Pair Square Hole Rails, Window Door on Front, Solid Door on Rear, Gasket Top Panel, Bottom, Casters, Levelers, Ice Cube 8,000 BTU AC Unit, 120 V N/A Preconfigured Cabinet 1 No 19 28 56 34.34 38.88 2000 lbs. Static Load Yes (Select Color) No No No No No Pre-Configured DEFENDER Air Conditioned Server Cabinet - 28U, 19" EIA, 8000 BTU AC Ships fully assembled. AC Unit Inside of Cabinet Frame, 2 Pair Square Hole Rails, Window Door on Front, Solid Door on Rear, Gasket Top Panel, Bottom, Casters, Levelers, Ice Cube 8,000 BTU AC Unit, 120 V
DC-28U2442-AC3000-D
461621
Pre-Configured DEFENDER Air Conditioned Server Cabinet - 28U, 19" EIA HxWxD = [56.00" x 30.34" x 44.13"] [1422mm x 770mm x 1120mm] Includes: Frame, 2 Pair Square Hole Rails, Window Door on Front, Solid Door on Rear, Gasket Top Panel, Bottom, Casters, Levelers, Ice Cube 3,000 BTU AC Unit, 120 V N/A Preconfigured Cabinet 1 No 19 28 56 30.34 44.13 2000 lbs. Static Load Yes (Select Color) No No No No No Pre-Configured DEFENDER Air Conditioned Server Cabinet - 28U, 19" EIA, 3000 BTU AC Ships fully assembled. AC Unit Inside of Cabinet Frame, 2 Pair Square Hole Rails, Window Door on Front, Solid Door on Rear, Gasket Top Panel, Bottom, Casters, Levelers, Ice Cube 3,000 BTU AC Unit, 120 V
DC-28U2442-AC6000-D
461648
Pre-Configured DEFENDER Air Conditioned Server Cabinet - 28U, 19" EIA HxWxD = [56.00" x 34.34" x 44.13"] [1422mm x 872mm x 1120mm] Includes: Frame, 2 Pair Square Hole Rails, Window Door on Front, Solid Door on Rear, Gasket Top Panel, Bottom, Casters, Levelers, Ice Cube 6,000 BTU AC Unit, 120 V N/A Preconfigured Cabinet 1 No 19 28 56 34.34 44.13 2000 lbs. Static Load Yes (Select Color) No No No No No Pre-Configured DEFENDER Air Conditioned Server Cabinet - 28U, 19" EIA, 6000 BTU AC Ships fully assembled. AC Unit Inside of Cabinet Frame, 2 Pair Square Hole Rails, Window Door on Front, Solid Door on Rear, Gasket Top Panel, Bottom, Casters, Levelers, Ice Cube 6,000 BTU AC Unit, 120 V
DC-28U2442-AC8000-D
461650
Pre-Configured DEFENDER Air Conditioned Server Cabinet - 28U, 19" EIA HxWxD = [56.00" x 34.34" x 44.13"] [1422mm x 872mm x 1120mm] Includes: Frame, 2 Pair Square Hole Rails, Window Door on Front, Solid Door on Rear, Gasket Top Panel, Bottom, Casters, Levelers, Ice Cube 8,000 BTU AC Unit, 120 V N/A Preconfigured Cabinet 1 No 19 28 56 34.34 44.13 2000 lbs. Static Load Yes (Select Color) No No No No No Pre-Configured DEFENDER Air Conditioned Server Cabinet - 28U, 19" EIA, 8000 BTU AC Ships fully assembled. AC Unit Inside of Cabinet Frame, 2 Pair Square Hole Rails, Window Door on Front, Solid Door on Rear, Gasket Top Panel, Bottom, Casters, Levelers, Ice Cube 8,000 BTU AC Unit, 120 V
DC-40U2436-AC12000-D
461653
Pre-Configured DEFENDER Air Conditioned Server Cabinet - 40U, 19" EIA HxWxD = [77.00" x 34.34" x 38.88"] [1955mm x 872mm x 988mm] Includes: Frame, 2 Pair Square Hole Rails, Window Door on Front, Solid Door on Rear, Gasket Top Panel, Bottom, Casters, Levelers, Ice Cube 12,000 BTU AC Unit, 120 V N/A Preconfigured Cabinet 1 No 19 40 77 34.34 38.88 2000 lbs. Static Load Yes (Select Color) No No No No No Pre-Configured DEFENDER Air Conditioned Server Cabinet - 40U, 19" EIA, 12000 BTU AC Ships fully assembled. AC Unit Inside of Cabinet Frame, 2 Pair Square Hole Rails, Window Door on Front, Solid Door on Rear, Gasket Top Panel, Bottom, Casters, Levelers, Ice Cube 12,000 BTU AC Unit, 120 V
DC-40U2436-AC8000-D
461651
Pre-Configured DEFENDER Air Conditioned Server Cabinet - 40U, 19" EIA HxWxD = [77.00" x 34.34" x 38.88"] [1955mm x 872mm x 988mm] Includes: Frame, 2 Pair Square Hole Rails, Window Door on Front, Solid Door on Rear, Gasket Top Panel, Bottom, Casters, Levelers, Ice Cube 8,000 BTU AC Unit, 120 V N/A Preconfigured Cabinet 1 No 19 40 77 34.34 38.88 2000 lbs. Static Load Yes (Select Color) No No No No No Pre-Configured DEFENDER Air Conditioned Server Cabinet - 40U, 19" EIA, 8000 BTU AC Ships fully assembled. AC Unit Inside of Cabinet Frame, 2 Pair Square Hole Rails, Window Door on Front, Solid Door on Rear, Gasket Top Panel, Bottom, Casters, Levelers, Ice Cube 8,000 BTU AC Unit, 120 V
DC-40U2442-AC12000-D
461654
Pre-Configured DEFENDER Air Conditioned Server Cabinet - 40U, 19" EIA HxWxD = [77.00" x 34.34" x 44.13"] [1955mm x 872mm x 1120mm] Includes: Frame, 2 Pair Square Hole Rails, Window Door on Front, Solid Door on Rear, Gasket Top Panel, Bottom, Casters, Levelers, Ice Cube 12,000 BTU AC Unit, 120 V N/A Preconfigured Cabinet 1 No 19 40 77 34.34 44.13 2000 lbs. Static Load Yes (Select Color) No No No No No Pre-Configured DEFENDER Air Conditioned Server Cabinet - 40U, 19" EIA, 12000 BTU AC Ships fully assembled. AC Unit Inside of Cabinet Frame, 2 Pair Square Hole Rails, Window Door on Front, Solid Door on Rear, Gasket Top Panel, Bottom, Casters, Levelers, Ice Cube 12,000 BTU AC Unit, 120 V