The CM-ATX-FAC is a new generation of air-cooled, forced air enclosure that has been designed exclusively for applications where customers may wish to install commercial/industrial Flex ATX Motherboards for low cost, rapid deployment defense systems.
Internal layout is divided into 2 independent metallic partitions. Motherboard area and PSU section at the side. This improves EMI/EMC performance & reduces PSU noise on system electronics.
The enclosure is available with or without power supply to provide extra space for the installation of electronic hardware that can be directly powered via the application platform. Alternatively, the enclosure may be retrofitted with any combination of electronics.
For stand-alone systems, a CM military PSU (adopted from our military ATR chassis line) delivers up to 850 watts of output power. The PSU will accept either AC or DC input voltages from 9-375VDC and 90-264VAC, supporting a wide variety of applications. An oversized capacitor bank on-board the PSU provides extended hold up time in the event of power failure.
Heat generated within the enclosure is dissipated via forced air convection. Dual rear exhaust fans draw ambient air through the enclosure carrying unwanted heat from the motherboard. Heat is also conducted through the chassis metalwork to the environment.
Heat dissipation capacity is not dependent upon cold plate mounting but can improve thermal performance slightly and decrease payload Delta-T by approximately 5ºC, extending the MTBF of the enclosed electronics.
Units fitted with an integrated PSU may also benefit from an interdependently powered thermal protection system. A Temperature Supervisory Unit monitors enclosure temperatures, controlling rear fans and optionally installed cold start-up heaters. The TSU also provides remote control operation functionality.
Front panel indicators and front panel connectors are fitted according to customer requirements. Custom connectors may also be fitted where additional PCIe card capabilities are required.
Payload Dissipation:350 Watts @ 55ºC (no cold plate)
The CM-ATX-FAC enclosure is expressly designed to simplify development, maintenance and logistics of military systems. The military Flex ATX enclosure yields substantial cost savings compared to native military open bus architectures typically found within the defense sectors, such as VPX, VME and cPCI, etc..
The enclosure can be easily mounted via base per-drilled threaded holes. Custom connector Front Panels, enclosure metalwork modifications and mounting options can be designed upon request, this may include for example, rear panel fixings, protruding bottom cover legs, self-clinching pilot pins, or other.
The small form factor enclosure is ideal for multiple military applications that are of limited space, weight sensitive, in close proximity to an operator and in a deploy & forget scenario.
The CM-ATX-FAC enclosure has been designed to accept ATX specification 2.2, Flex and Mini-ITX sized motherboards. Customers may integrate any variants of motherboard since universal mounting holes on the bottom cover have been machined. For electronics that are non ATX compliant, customization of mounting holes can be carried out upon request.
In spite that the CM-ATX-FAC enclosure has been designed for ATX motherboards, the enclosure can provide solutions for any custom or Modular Open Systems Architecture (MOSA) in order to deliver a military rugged solution.
The CM-ATX-FAC enclosure can support high power CPUs, FPGAs, PCIe cards, etc. The enclosure fits twin rugged DC fans that provide 120FCM of airflow. Military Rotron PX2 fans (130 to 200 CFM) maybe optionally fitted for high altitude applications.
PCIe card guides have been designed to provide expansion card stiffening. Card guides maybe optionally installed at fixing points on the inside front panel and lateral wall to provide ample strengthening.
The CM-ATX-FAC can optionally fit a System Control Unit (SCU). This device interfaces the power supply and installed FlexATX motherboard. The SCU also incorporates a Temperature Supervisory Unit (TSU) that controls the Power Supply state, rear Fans and enclosure Heaters operation. The SCU is mandatory in triggering a pulsed power on signal for ATX motherboard booting.
Systems fitted with the TSU will benefit from the ability to intercommunicate with the PSU, interrogate and receive the following information:
The user defined Front panel is delivered full machined and silk screened, ready to accept customer connectors. I/O wiring and integration of payload electronics is our customers task. CM can provide this service on large order quantities upon request.
Rugged Defense Server, developed for military airborne applications for a leading ruggedized computing hardware solutions provider. The enclosure is fitted with a 16 core Intel® Xeon® processor and 128GB ECC RDIMM DDR4.
The configuration boasts twin 10G SFP+ ports, 6 GbE LAN ports, IPMI, VGA, Serial and USB ports that are fully military compliant and qualified. This 'turn-key' system builds on Super Micro Computer, Inc motherboard technology.
Front Panel connectors and signals lines are delivered fully customized for the application.
Signal integrity, wiring density and performance are all highly optimized in this COTS SwaP solution. The CM-ATX-FAC enclosure is supplied with a full military grade PSU and all premium features of the CM's supervisory system.
CM-ATX-FAC enclosure PSUs support a wide variety of AC/DC input voltages (MIL-STD-704 & MIL-STD-1275) and customer defined DC power output combinations up to 850 Watts.
The CM-ATX-FAC fits the C-850W model as standard for compliance with ATX specifications. Refer to 3U PSUs if your application does not use an ATX motherboard.
All PSU models are fitted with Power Fail Monitor, remote voltage sensing, output voltage trim-up, time-delayed protection fuses, rear fan fuse and DC/DC converter remote shutdown.
To comply with MIL-STD-461E, a high capacity integrated EMI/EMC input voltage filter is fitted as standard.
Single-phase AC PSUs are fitted with a VICOR military Filter and Autoranging Rectifier Module (FARM) to provided EMI filtering, autoranging line rectification and inrush current limiting to meet MIL-STD-461E category A1b specifications for Electromagnetic Compatibility.
200VAC 3-Phase PSU versions additionally incorporate AC/DC rectifier stage prior to the VICOR FIAM front-end modules.
DC PSUs are equipped with a VICOR military Filter and Attenuator Module (FIAM). This front-end device is fitted prior to the DC/DC converters to provide EMI filtering, inrush current limiting and transient protection.
Front-end FIAM modules are protected against DC reverse polarity. An optional reverse polarity diode may be fitted in series with power connector input pin IN (+).
The CM-ATX-FAC PSU incorporates isolated DC/DC converters and oversized hold-up capacitors to ensure proper operation during short power line failures. Outputs are protected against short-circuit, thermal-shutdown etc. PSUs are custom made to match the enclosure mechanics.
The CM-ATX-FAC PSU is attached to the chassis side panel to provides both conduction & convection cooling, internal air also aids in dissipating heat generated.
Forced air drawn through the chassis is exhausted, dissipating the majority of heat generated. Heat is also dissipated via thermal conduction to the enclosure frame.
A Temperature Supervisory Unit (TSU) is fitted as standard for ATX systems. This device protects electronics against extreme climatic conditions, switching the power supplies OFF (Standby) when the internal temperature is under or over the established limits. Users may set HI & LO temperature trip-points to regulate and optimize the system safety operational temperature range.
|BATTLE Remote||STANDBY Remote||SYSTEM POWER SUPPLY & TSU STATUS|
|Switch-OFF||Switch-OFF||NORMAL OPERATION. Both PSU and TSU operate normally.|
|Switch-OFF||Switch-ON||PSU in STAND-BY MODE. The PSU converters are forced to stand-by. No DC power is available to the digital payload. The TSU operates normally.|
|Switch-ON||Switch-OFF||BATTLE MODE (TSU DISABLED). The PSU is operating normally. The TSU is not allowed to shut-down the system power regardless of temperature.|
|Switch-ON||Switch-ON||PSU in STAND-BY MODE. The PSU converters are forced to stand-by. No DC power is available to the digital payload. The TSU is disabled.|
Heating elements are also fitted for mitigating against cold startups. An ‘early warning’ signal advises the digital electronics prior to shutdown-to-standby, allowing critical data to be orderly stored and saved. Power is restored once internal temperatures are within operational limits. All functions can be user enabled or disabled by soldered bridges.
The user defined Front panel is delivered full machined and silk screened, ready to accept customer connectors. I/O wiring and integration of payload electronics is our customer's task. CM can provide this service on large order quantities upon request.
Systems fitted with the CM integrated Power Supply will benefit by having the ability to intercommunicate with the PSU, interrogate and receive the following information: A System Control Unit (SCU) is fitted as standard for ATX systems for motherboard booting compliance.
Thermal Monitoring - The Low and High TSU temperature trip points are user adjustable through two multi-turn trimming resistors located in the power supply PCB. Factory presets fitted with fixed resistors can be installed in production series.
Thermal Heaters - Resistive heating elements powered by the TSU are bolted to the enclosure frame in order raise internal temperatures during cold startups.
Battle Short Switch - Ability to disable the TSU during emergency or battle situations via a remote ‘Battle short’ switch. This bypasses/overrides all critical TSU functionalities despite the risk of payload temperature over-stress.
Reset Push Button - A remote push button allows to reset the Switch digital payload without switching off the mains breaker. TSU remote operations can be manually activated by an operator or via a master computer.
Delayed Shut-down - An AC/DC FAIL* signal advises the CPU when power failure is imminent prior to power shut-down. Ethernet communications and critical data in memory, etc may be orderly stopped or saved.
PSU Standby Switch - Allows the user to manually set the system to ‘low power’ Standby mode without requiring to switch off the mains breaker, should the system be required to operate for a few hours but remain available on demand.
Power Supply - TSU circuitry is powered by an independent +5VTSU @ 2 Watt PSU. This module is permanently connected to the power input & remains operational during Standby.
Front Panel LEDs - TSU status & operations can be visualized in real time via three chassis front panel LEDs: TSPW (TSU power on), TSHI (system over temperature) and TSLO (system under temperature).
|PAYLOAD AREA||222 mm x 232 mm x 120 mm|
|CPTR COEFF||ΔT/W = ...°C|
|MAX PSU POWER||850 Watts|
|PSU V-INPUT||28 VDC ±30%, 48 VDC ±30%, 72 VDC ±30%, 270 VDC ±30%, Autorange 90-132 VAC RMS & 180-264 VAC RMS 47-880 Hz, 3-Phase 200 VAC ±30% 47-880 Hz|
|EXT. REAR FAN||2 Rugged or 2 Rotron PX2|
|STDF||120 CFM (Rugged)|
|F115-400||130 CFM (Rotron PX2)|
|F200-400||240 CFM (Rotron PX2)|
|FRONT PANEL AREA||55 mm x 200 mm|
|MTBF||25° GB 82,000 Hours, 65° AIC 27,000 Hours|
|OPERATING TEMP||-40°C to +85°C Operating Temperature, -55°C to 100°C Storage Temperature|
|MOUNTING OPTION||CM-ATX-TR (Baseplate mounting)|
This highly optimized small form factor enclosures incorporate all proprietary technologies, features and well established mechanical & electrical solutions developed during the past 30 years.