3U ATR FAC Description
Non-sealed, 1" pitch, high performance 3U chassis in which external air is directly forced over electronic payload modules using a rear mounted exhaust fan. This efficient thermal management technique is suitable for full PSU wattage applications.
Heat generated within the enclosure is dissipated via forced air convection. An exhaust fan (or air plenum) draws ambient air through the chassis carrying unwanted heat from payload modules. Heat is also conducted through the chassis metalwork to the environment.
CM-ATR-3U/FAC
The 3U FAC chassis is available in a 5 slot version only (½ ATR), supporting VME, cPCI & VPX backplanes. A total PSU power of up to 575 watts may be installed. Custom modifications can be designed upon customer request.
Internal layout is divided into 3 independent metallic partitions. I/O section at the front, card-cage in the middle & PSU section at the rear. This improves EMI/EMC performance & reduces PSU noise on system electronics.
Attention to I/O flexibility and easy board integration; allowing 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.
3U FAC Performance
The 3U FAC chassis is suitable for high wattage non-sealed applications that demand superior cooling capability.
FAC - Chassis Global Thermal Resistance (CGTR) coefficient:
ΔT/W = 0.06°C (½ ATR).
FAC - Chassis Payload Thermal Resistance (CPTR) coefficient:
ΔT/W = 0.096°C (½ ATR).
For reliable operation it is recommended the maximum Payload Power not be exceeded. Subject to operating conditions. All CM 3U ATR chassis are delivered tested, qualified and certified per Military Standards MIL-STD-461E & MIL-STD-810F.
3U Backplanes
CM 3U backplanes are low noise, full military VMEbus, VPX or cPCI-S compatible and provide fully standard bus slot & signal daisy-chain functionalities. Bus slots are tailored for 1 inch pitch standard & deliver full compatibility with 0.8 inch pitch 3U modules.
CM 3U enclosures incorporate a versatile universal ‘MCS’ slot mixed card-cage that accepts all off-the-shelf Conduction Cooled and Air Cooled 3U modules.
An alternative ‘CCS’ conduction cooled card-cage is available for conduction-cooled boards only, whereby improving thermal performance.
All 3U backplanes install specific TTL logic circuitry for driving up to 8 front panel user LED indicators.
All 3U backplanes integrate a Temperature Supervisory Unit (TSU) with panel LED (over/under temperature) that controls Power Supply & Fan operation. Remote optoisolated control switches for ‘Battle-short’ & chassis PSU ‘on/standby’ are fitted as standard.
- VME64x backplanes. Conduction-cooled IEEE-1101.2 & air-cooled IEC-297/IEEE.1101.1 modules.
- VPX backplanes conform to VITA 46 / 65 / 66 / 67 (≥10 GHz Gen 3).
- Compact PCI Serial backplanes according to PICMG CPCI-S.0 R2.0 2015 / IEEE 1101 standards.
CM 3U military backplanes allow unlimited pin I/O wiring capability. Flexible top & bottom wiring integration is facilitated by a standard 25mm bottom cavity clearance.
Class 1 military power input connectors fitted on the backplane offer shock & vibration reliability interconnectivity between chassis internal modules & allows high DC current rates with low voltage drops and minimum contact heating.
3U backplanes are supplied with military conformal coating. Printed circuits boards are partially coated per MIL-I-4658C. This is carried out only in areas in which coating the product does not affect VPX, VME, cPCI or I/O connectors.
All 3U models integrate the same backplane electronics for easy switch-overs, retrofits or replacement parts.
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3U FAC Power Supplies
3U FAC chassis 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 575 Watts. Available in 6 different versions (A-B-C-...) to suit the demand per DC Line of standard COTS open busses.
CM-PS-3U/FAC
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-461G, a high capacity integrated EMI/EMC input voltage filter is fitted as standard on all 3U models. All models integrate the same PSU and backplane electronics.
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 (+).
3U FAC PSUs incorporate 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 PSU in FAC models is attached to a heat exchanger panel that provides both conduction and convection cooling. Internal air recirculation dissipates heat generated by the PSU through its panel via thermal conduction to the chassis frame.
Forced air that is drawn through the heat exchangers, passing over the PSU panel external fins & exhausted, removing the majority of heat.
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3U ATR FAC Features
Rear Fan Options
3U FAC chassis fit a single Rugged (-10°C to +70°C) exhaust fan as standard. Military PX2 fans are optional (-54°C to +125°C).
LED Front Panel Indicators
Up to 8 front panel LED indicators for chassis monitoring; power on/off status, system board failure, input voltage, temp., etc.
Front Panel
Custom layout with client logo, connectors & silk-screening or a general purpose panel with MIL-C-38999 connectors is supplied.
Product Flexibility
Optional Extended or Heat Exchanger covers can be selected for additional wiring clearance & are removable for easy maintenance.
Chassis Metalwork
Precision machined aeronautical aluminum with MIL-DTL-5541F chromate coating. All panels & joints incorporate EMI gaskets.
Mounting Tray
Low profile with quick release system offers easy insertion/removal capability, weight optimized with minimized dimensions.
EMI/EMC Filter
High capacity integrated EMI/EMC input voltage filter is fitted as standard on all 3U models to comply with MIL-STD-461F.
Air Recirculation
All 3U chassis incorporate a low profile internal fan pack to recirculate air, improving card-cage, PSU & module heat dissipation.
Card-cage Slots
Selective mechanics for either mixed (MCS: Conduction-cooled & Air-cooled boards) or (CCS: Conduction-cooled boards only).Capabilities
- Accepts Conduction-cooled 3U Modules only
- Flexible Bottom I/O wiring
- In-line EMI/EMC MIL-STD-461G Filter
- Up to 300W* Total Payload Power (30ºC Delta-T)
- Integrated Chassis Supervisory System (CSS)
- Maintenance free operation
- Front panel user indicators
- Integrated Rear fan guards
- Independent Fan & Power Supply input voltage
- Stand alone low weight ATR
- Internal card-cage airflow recirculation
- Military Operating Temperature (-40°C | +85°C)
- Customizable to specific requirements
- Low Profile Mounting Tray with quick release
- Manufactured with US MIL components
3U ATR FAC Specifications
CM-ATR-3U/FAC |
|
| WIDTH | 153 mm |
| HEIGHT | 225 mm |
| DEPTH | 248 mm |
| WEIGHT | 3.9 Kg |
| CGTR COEFF | ΔT/W = 0.06°C |
| CPTR COEFF | ΔT/W = 0.096°C |
| MAX PSU POWER | 575 Watts (28 VDC 475 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 |
| STD BACKPLANE | 3U (1" Pitch), 5-SLOT VME64X or cPCI or VPX |
| BOARD FORMAT | CCS: Conduction-cooled slots only or MCS: Slot-by-slot user configured card-cage allows intermixing conduction-cooled ANSI-VITA 48.2 & air-cooled ANSI-VITA 48.1 boards |
| EXT. REAR FAN | 1 x Rugged Fan or 1 x Rotron PX2 Fan |
| STDF | 60 CFM (Rugged) |
| F115-400 | 65 CFM (Rotron PX2) |
| F200-400 | 120 CFM (Rotron PX2) |
| FRONT PANEL AREA | 125 mm x 140 mm |
| CM FRONT PANEL I/O | 6 Power Pins (13 Amp) & 382 I/O Pins (5 Amp) |
| 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 TRAY | CM-TR-3U/FAC |
3U ATR COTS MODELS
These highly optimized 3U chassis incorporate all proprietary technologies, features and well established mechanical & electrical solutions developed during the past 20 years.
FAC:Flow-through airflow open enclosure.S:Standard sealed contaminant-free enclosure.
SEF-18HP:Sealed with Extended Fins + 18 Heat Pipes contaminant-free enclosure.
HES:Sealed contaminant-free enclosure fitted with 4 integrated heat exchangers as standard.
HES-FBL:Sealed, conventional front-to-back format contaminant-free enclosure fitted with 4 integrated heat exchangers as standard.
HES-FBL-HP:Sealed, conventional front-to-back format contaminant-free enclosure fitted with 4 integrated heat exchangers and heat pipes as standard.
3U ATR MIL Certificates
3U ATR Ordering Information
CM-ATR-3U /CT /B /I /W /FP /TC /BC /CS /F /C
/CT Enclosure Cooling Technique- CM-ATR-3U/FAC: Flowthrough Air Cooled (open).
- VME64x: Military VME64x Backplane (5 Slot 3U 1" Pitch).
- cPCI-S: Military Compact PCI Serial Backplane (5 Slot 3U 1" Pitch).
- VPX: VITA 46 Military VPX Backplane (5 Slot 3U 1" Pitch).
- VPX-6: VITA 46 Military VPX Backplane (6 Slot 3U 0.85" Pitch).
- 28VDC: 28 VDC Input.
- 48VDC: 48 VDC Input.
- 72VDC: 72 VDC Input.
- 270VDC: 270 VDC Input.
- 90-264VAC: Autorange 90-264 VAC @ 47-880 Hz Input.
- 200VAC-3Ph: 200 VAC 3 Phase @ 47-880 Hz Input.
- A-475W: 28 VDC* (+5 VDC @ 40A, +3.3 VDC @ 22A, ±12 VDC @ 8A).
- A-575W: All PSUs* (+5 VDC @ 40A, +3.3 VDC @ 22A, ±12 VDC @ 12A).
- B-450W: 28 VDC* (+5 VDC @ 20A, +3.3 VDC @ 45A, ±12 VDC @ 8A).
- B-550W: All PSUs* (+5 VDC @ 20A, +3.3 VDC @ 45A, ±12 VDC @ 12A).
- C-475W: 28 VDC* (+5 VDC @ 20A, +3.3 VDC @ 22A, +12 VDC @ 16A, -12 VDC @ 8A).
- C-575W: All PSUs* (+5 VDC @20A, +3.3 VDC @22A, +12 VDC @21A, -12 VDC @12A).
28 VDC* = 28 VDC input only
- CMP: Standard CM front panel fitted with MIL-C-38999 connectors.
- UDP: User defined front panel layout (requires customer drawing).
- STC: Standard Top Cover. (Fitted as standard).
- FTC: Finned Top Cover. Wiring clearance 13mm.
- HTC: High-profile Top Cover. Wiring clearance 35mm.
- HETC: Heat Exchanger Top Cover. No Wiring clearance (Fitted as standard).
- SBC: Standard Bottom Cover. Wiring clearance below backplane 24mm. (Fitted as standard)
- HBC: High-profile Bottom Cover. Wiring clearance below backplane 49mm.
- MCS: Universal Card-cage Slots (Mixed Conduction-cooled & Air-cooled Boards).
- CCS: Conduction cooled Card-cage Slots (Conduction-cooled Boards Only).
- STDF: 1x 60 CFM DC Rugged Fan.
- F115-400: 1x CFM Rotron PX2 Military Fans fitted for 115 VAC @ 400Hz.
- F200-400: 1x 120 CFM Rotron PX2 Military Fan fitted for 200 VAC 3-phase @ 400Hz).
- B: Black, G: Navy Grey, E: Army Dark Earth, W: White, R: Red, PT: Platinum, YW: Yellow, GN: Green, BLU: Dark Blue, CR: Chromate MIL-C-5541 or O: Other (user defined).
CM-ATR-3U/FAC/VPX/90-264VAC/C-575W/UDP/STC/SBC/MCS/F115-400/GN
- 5 slot, 3U Avionics Enclosure.
- Flowthrough Air Cooled Enclosure (Open, Non-Sealed).
- 5 slot, 3U VPX backplane.
- 115VAC @ 400 Hz input power supply.
- C-575W Power Supply (+5VDC @ 20A, 3.3VDC @ 22A, +12VDC @ 21A, -12VDC @ 12A).
- User defined front panel layout (requires customer drawing).
- Heat Exchanger Top Cover. Wiring clearance 13mm.
- Standard Bottom Cover. Wiring clearance below backplane 25mm.
- Universal Card-cage Slots (Mixed Conduction-cooled & Air-cooled Boards).
- 1x 65 CFM 115 VAC @ 400 Hz Military Fan.
- Enclosure color is green.