product video thumbnail

ExpressBox 4 (1U)

A powerful and scalable expansion solution built for industrial environments

EOL, Call for Availability.

ExpressBox 4 (1U) is the most reliable PCIe expansion solution designed for industrial environments where serviceability and availability features are required.

SKU: eb4-1u-x8g2 / eb4-1u-x8g2-ext
Featured, In Defense and Aerospace

Magma ExpressBox 4-1U provides a rock-solid upgrade path to increase the number of PCI Express slots available to your server. You can maintain a consistent server configuration, while adding more I/O capacity and scalability with a Magma expansion chassis like ExpressBox 4-1U. Now, an almost unlimited number of PCIe cards can be attached to a single server. Moving PCIe cards outside the host computer to an expansion chassis allows server manufacturers to reduce the amount of power required in the server. And, because ExpressBox 4-1U monitors temperature, power, and fans with alerts using SNMP and audible alarms, you can feel confident that your entire systems remains reliable, available and serviceable.

Maximize Limited Rack Space

ExpressBox 4-1U is the only expansion solution that provides four full-length PCI Express slots in a 1U rack-mount chassis and includes a hot-swappable redundant power supply and hot-swappable cooling fans. Additionally, the PCIe slots are hot-pluggable so you can replace a defective card without shutting down the system.

Easy Installation

ExpressBox 4-1U consists of a PCIe host card, a cable and 1U rack-mount enclosure. It is automatically configured by the system BIOS and all slots appear transparent to the host computer. ExpressBox 4-1U is designed to fit conveniently into a typical 4-post rack cabinet. Card retainers inside the enclosure keep your cards securely in place during transportation.

PCI Express Hot-Plug Support

Easily remove and replace PCIe cards without powering downing the server:

  • Initiate a hot-swap request without affecting the operation of the entire system
  • Any of the PCIe cards can be stopped and replaced with a replacement card
  • All slots designed to protect the PCIe card electrically in the event of its surprise removal

PCI Express Hot-Plug Support

  • Utilizes the SNMP protocol to monitor and report normal operation parameters as well as alerts and failure events
  • Audible alert for over temperature, fan failure or power supply failure


  • Add four PCIe slots in only 1U of rack space
  • Attach full-length PCIe cards to servers with limited card space
  • Multiple expansion chassis can be daisy-chained
  • Keeps your I/O configuration consistent from server to server
  • Protects your investment in expensive I/O cards during server migrations and upgrades
  • Mission critical solution provides notifications of failures with SNMP trap and audible alarm
  • Minimize downtime by servicing problems immediately
  • PCIe Slots can be turned off without powering down system
  • Reduce power consumption and rack space


  • Automatically configured by the system BIOS
  • Automatic power-up control by computer
  • Easily visible LEDs indicate correct installation
  • High-speed x8 PCIe connection to server
  • Hot-pluggable PCIe slots support full-length cards
  • Slots support any combination of x1, x4, x8 and x16 PCIe cards
  • Sliding card carriage provides access to PCIe cards without removing enclosure from cabinet
  • Adjustable card retainers hold cards in place
  • SNMP agent monitors critical components and slots for power condition
  • Includes auxiliary power cables for high wattage cards
  • Hot-swappable fans and power supplies
EB4-1U-X8G2 4 Slot PCI Express Expansion System, 1U form factor
EB4-1U-x8G2-EXT Additional ExpressBox 4-1U for daisy-chaining
SUBCBL3IP Substitute 3m iPass cable
SUBCBL7IP Substitute 7m iPass cable
60-00038-01 Replacement 1m iPass cable
01-05990-00 Replacement hot-swappable fan module
40-00024-01 Replacement redundant power supply module
01-05996-03 Replacement auxillary power cable
01-04978-03 Replacement host card (x8 PCIe Gen2)
  • PCI Express Bus Specification Revision 2.0
  • PCI Hot-Plug Specification 1.1
  • 4 PCIe slots (two on each side of backplane)
  • x8 PCIe Gen 2 slot speeds (x16 connectors)
  • Hot-Pluggable slots (75W per slot)
  • Use AUX power cable for higher wattage cards
    NOTE: Hot plug features will be managed by BIOS instead of being managed by the Operating System. If the BIOS does not support Hot-Plug, then the hot-plug feature / capability on any Expansion units will not function at all
Cable 1-meter iPass included (3m or 7m optional)
Interconnect Bandwidth 40Gbps (PCIe x8 Gen 2)
Rack-mount 1U Rack-mount
Dimensions 19"W x 1.75"H x 28"D
Weight 27 lbs (12.27 kg)
Rackslides 24” pre-installed rack-slides
System Cooling
  • Three hot-swappable fans
  • One fan in each power supply module
Monitoring Features
  • SNMP Version 1
  • Audible Alarm for temperature, fan, power failure
Power Supply
  • 420 Watt Redundant, Hot-swappable
  • AC Input: 100-240 VAC, 50-60 Hz
  • AC Input Current: 6.0 Amps
  • 12V @ 35 Amps
  • +5Vsb @ 3.0 Amps
Ambient Temperature 0º to 70º C
Storage Temperature -55º to 125º C
Relative Humidity 0% to 90% non-condensing
  100,000 Hours
Regulatory Compliance
FCC Class A Verified
RoHS Compliant
CE Certified
Supported Operating Systems
  • Windows
  • Mac OS X
  • Linux
  • Solaris
Package Contents
  • Four PCI Express slots
  • Cooling fans (Hot-Swappable)
  • Power supplies
  • Adjustable PCIe card retainers
  • PCI Express card slot opening
  • iPass connector to host computer
  • iPass connector to daisy-chain expansion chassis
  • RJ45 Ethernet connection for SNMP
  • Power cord sockets
  • Hot-swappable fans
  • Status Indicators
  • Hot-swappable power supplies
Hardware Included
  • iPass cable
  • PCIe host card


You must be logged in to access the following documentation. Login or Register

Related Products