Universal COTS ATR Chassis Solutions

universal cots rugged 3u & 6u atr chassis
cm computer logo
An extensive range of universal COTS ATR chassis designed for military aerospace platforms & UAV applications requiring a high performance, cost effective solution.

CM Computer ATR products are Tested and Certified by independent authorized labs per MIL-STD-461E/F & MIL-STD-810F/G for immediate deployment in Navy & Air Force military Fighters, Submarines, Ground Systems, UAVs & Helicopters.

Fully configurable build options include :- backplanes (number of slots, cPCI, VME, VPX), power supplies, cooling, extended top & bottom covers, I/O & front panel connectors, logos, silk screening, paint finishes etc.

ATR Power Supplies

CM ATR military Power Supply Units (PSU) are custom made to match the enclosure mechanics. The PSUs have exceptional output power and are available in up to 575W (5 slot), 825W (7 slot) & 1550W (12 slot) versions to satisfy the full range of applications regardless of card-cage power needs.

Chassis fitted with a DC PSU are equipped with a VICOR Filter Input Attenuator Module (FIAM). Integrated prior to DC/DC converters, this front-end device provides; EMI filtering, autoranging line rectification, inrush current limiting & transient protection. AC PSUs are fitted with VICOR military Filter Autoranging Rectifier Modules (FARM).

atr chassis psu module

ATR Backplanes

CM ATR backplanes are available in 6U & 3U formats with 3, 5, 7, 9 & 12 slots. The integrated backplanes are low noise, full military VMEbus, VPX or cPCI compatible and provide fully standard bus slot & signal daisy-chain functionalities.

For VPX and OpenVPX, backplanes are available in VITA 46 / 65 / 66 / 67 in both 0.8” & 1" pitch size slot versions. Connectors J3 thru J6 are free for customer I/O wiring. J1 incorporates high-speed MultiGig mesh switched serial fabric connectors (up to 10 Gbps), full mesh topology, interconnects Rapid I/O, PCI-Express and 10 Gigabit Ethernet.

3u vpx backplane

ATR I/O Wiring Solutions Using Rigid-Flex Circuits

CM ATR I/O Rigid-Flex wiring harness offers a complete configurable custom I/O wiring solution. Flex and Rigid-Flex circuits are capable of carrying hundreds of signals within a small space, constituting an advanced wiring solution for high density I/O ATR enclosures.
flex-io wiring harness

Example Chassis Configurations

Product Name
Other Features

Product Name: HES-FBL


  • Sealed, 1" pitch, high performance dry-air 3U chassis incorporates four heat exchangers and air re-circulation fans inside
  • Available in 3, 5, 7 & 9 slot versions, supporting VPX & cPCI-S backplanes
  • A total PSU power of up to 575 watts may be installed
  • The chassis card-cage is designed for wedgelock IEEE P1101.2 conduction-cooled card types
  • This series of chassis provides the greatest expansion flexibility, system interoperability and lowest upgrade costs for advancing platforms
  • -40 °C to +85 °C Operating, -55 °C to 100 °C Storage

Other Features

cm computer front to back loading 3u atr chassis

Product Name: SEF-18HP


  • Sealed, 1" pitch, dry-air 3U chassis that incorporates extended cooling fins, 18 super conducting heat pipes & air re-circulation fans inside
  • Available in a 5 slot version only (½ ATR), supporting VME, cPCI & VPX backplanes
  • A total PSU power of up to 825 watts may be installed
  • Allows for the intermixing of wedgelock IEEE P1101.2 conduction cooled boards, IEC-297 air cooled modules, Compact PCI 1101.1/IEC/118/ CD and VPX VITA 46.0/.1/.10/.3/.4/.7 air cooled boards
  • The 3U SEF-18HP chassis is suitable for medium wattage sealed applications that demand high passive cooling capabilities
  • -40 °C to +85 °C Operating, -55 °C to 100 °C Storage

Other Features

cm computer Sealed Extended Fins + 18 Heat Pipes 3u atr enclosure

There are many standard variants available, fully configurable by build option, the above products are only a sample of the chassis types available. Please contact us for further information or to discuss your specific requirements...

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