3U - HES - 4 Heat Exchangers

Rugged SEALED COTS 3U ½ ATR - 5 slot. Certified per MIL-461F & MIL-810G for immediate deployment. Applications up to 250 watts. Configure Now

3U - HES - 4 Heat Exchangers

Custom COTS - Customer configurable & loaded with options: Extended bottom & top covers, front panel connectors, logos & silk screening, etc. Configure Now

3U ATR HES Description

Sealed, 1" pitch, high performance dry-air 3U chassis incorporates four heat exchangers and air re-circulation fans inside. This minimum maintenance option is ideal for applications where ambient air is laden with hostile or harmful contaminants.

CM-ATR-3U/HES

Heat generated within the enclosure is conducted to the hollow sidewalls, top cover & rear panel heat exchanger where it is dissipated to the ambient environment by forced air rear fans or by vehicle platform air plenum. Internal air recirculation fans ensure constant airflow across modules.

CM-ATR-3U/HES

The 3U HES chassis is 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. Custom modifications can be designed upon customer request.

CM-ATR-3U/HES Layout

Internal layout is divided into 4 independent metallic partitions. I/O section at the front, card-cage, PSU section & exhaust fans 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 HES Performance

Dissipation:★★★☆

Price:★★☆☆

Slots / Pitch:5   1"

Sealed (Dry Air):

≤ 250W

The 3U HES chassis is suitable for high wattage sealed applications that demand superior cooling capability.

HES - Chassis Global Thermal Resistance (CGTR) coefficient:
ΔT/W = 0.11°C (½ ATR).

HES - Chassis Payload Thermal Resistance (CPTR) coefficient:
ΔT/W = 0.122°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, cPCI 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-ATR-3U/ - Backplanes

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.

CM-ATR-3U/ - Backplanes
  • VME64x backplanes conduction-cooled IEEE-1101.2 & air-cooled IEC-297/IEEE.1101.1 modules.
  • VPX backplanes conform to VITA 46.0/.1/.10/.3/.4/.7.
  • Compact PCI backplanes according to IEC 1076 / PCI 1101.10/IEC 48D/118/CD standards.
  • 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.

CM-ATR-3U/ - Backplanes

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 HES Power Supplies

3U HES 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 3 different versions (A-B-C) to suit the demand per DC Line of standard COTS open busses.

CM-PS-3U/HES

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 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.

3U HES Power Supply Unit

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 HES 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.

3U HES Power Supply Unit

The PSU in HES models is attached to a heat exhanger 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 HES Features

3U HES Rear Fan Assembly
Rear Fan Options
3U HES chassis fits twin Rugged (-10°C to +70°C) exhaust fans as standard. Military PX2 fans are optional (-54°C to +125°C).
3U HES LED Indicators
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.
3U HES Front Panel
Front Panel
Custom layout with client logo, connectors & silk-screening or a general purpose panel with MIL-C-38999 connectors is supplied.
3U HES Panel Covers
Top/Bottom Covers
Removable Heat Exchanger Top Cover fitted as standard. High Profile Heat Exchanger covers are available for additional clearance.
3U HES Chassis Metalwork
Chassis Metalwork
Precision machined aeronautical aluminum with MIL-DTL-5541F chromate coating. All panels & joints incorporate EMI gaskets.
3U HES Mounting Tray
Mounting Tray
Low profile with quick release system offers easy insertion/removal capability, weight optimized with minimized dimensions.
3U HES EMI/EMC Filter
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.
3U HES Internal Air Recirculation
Air Recirculation
All 3U chassis incorporate a low profile internal fan pack to recirculate air, improving card-cage, PSU & module heat dissipation.
3U HES Card-cage Slots
Card-cage Slots
Selective mechanics for either mixed (MCS: Conduction-cooled & Air-cooled boards) or (CCS: Conduction-cooled boards only).

Capabilities

  • Contaminant-free enclosure
  • VPX, VME64, cPCI & cPCI-S ready (1" Pitch)
  • Accepts Conduction & Air-cooled 3U Modules
  • Flexible Top & Bottom I/O wiring
  • In-line EMI/EMC MIL-STD-461F Filter
  • Up to 250W* Total Payload Power (30ºC Delta-T)
  • 4 Integrated Heat Exchangers
  • Integrated Temperature Supervisory Unit (TSU)
  • 20°C less than conventional 3U ATRs
  • Dramatically increases payload MTBF by 4x*
  • 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
* Subject to operating conditions

3U ATR HES Specifications

CM-ATR-3U/HES
WIDTH 163 mm
HEIGHT 215 mm
DEPTH 290 mm
WEIGHT 5.6 Kg
CGTR COEFF ΔT/W = 0.11°C
CPTR COEFF ΔT/W = 0.122°C
MAX PSU PWR 825 Watts (28 VDC 625 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
INTERNAL FAN 4 x 13.5 CFM (54 CFM)
EXT. REAR FAN 2 Rugged or 2 Rotron PX2
STDF-DC 84 CFM (Rugged)
STDF-AC 94 CFM (Rugged)
F115-400 130 CFM (Rotron PX2)
F200-400 240 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/HES

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.

3U ATR MIL Certificates

3U ATR Ordering Information

Generic Part Number:
CM-ATR-3U /CT /B /I /W /FP /TC /BC /CS /F /C
/CT Enclosure Cooling Technique
  • CM-ATR-3U/HES: Sealed with 4 Heat Exchangers, top cover, sidewalls & rear panel.
/B Backplane Type
  • VME64x: Military VME64x Backplane (5 Slot 3U 1" Pitch).
  • cPCI: Military Compact PCI 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).
/I PSU Input Power Voltage
  • 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.
/W Power Supply Unit
  • 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).
  • A-675W: 28 VDC* (+5 VDC @80A, +3.3 VDC @22A, ±12 VDC @ 8A).
  • A-775W: All PSUs* (+5 VDC @80A, +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).
  • B-564W: 28 VDC* (+5 VDC @20A, +3.3 VDC @80A, ±12 VDC @ 8A).
  • B-664W: All PSUs* (+5 VDC @20A, +3.3 VDC @80A, ±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).
  • C-775W: 28 VDC* (+5 VDC @20A, +3.3 VDC @22A, +12 VDC @41A, -12 VDC @8A).
  • C-825W: All PSUs* (+5 VDC @20A, +3.3 VDC @22A, +12 VDC @41A, -12 VDC @12A).
  • D-550W: 28 VDC* (+5 VDC @40A, +3.3 VDC @45A, ±12 VDC @8A).
  • D-650W: All PSUs* (+5 VDC @40A, +3.3 VDC @45A, ±12 VDC @12A).
  • E-550W: 28 VDC* (+5 VDC @20A, +3.3 VDC @45A, +12 VDC @16A, -12 VDC @8A).
  • E-650W: All PSUs* (+5 VDC @20A, +3.3 VDC @45A, +12 VDC @21A, -12 VDC @12A).
  • F-575W: 28 VDC* (+5 VDC @40A, +3.3 VDC @22A, +12 VDC @16A, -12 VDC @8A).
  • F-675W: All PSUs* (+5 VDC @40A, +3.3 VDC @22A, +12 VDC @21A, -12 VDC @12A).
All PSUs* = All PSUs except 28 VDC input
28 VDC* = 28 VDC input only

/FP Front Panel Layout
  • CMP: Standard CM front panel fitted with MIL-C-38999 connectors.
  • UDP: User defined front panel layout (requires customer drawing).
/TC Chassis Top Cover
  • STC: Standard Top Cover. Wiring clearance 13mm.
  • FTC: Finned Top Cover. Wiring clearance 13mm.
  • HTC: High-profile Top Cover. Wiring clearance 35mm.
  • HETC: Heat Exchanger Top Cover. Wiring clearance 13mm. (Fitted as standard).
/BC Chassis Bottom Cover
  • SBC: Standard Bottom Cover. Wiring clearance below backplane 24mm. (Fitted as standard)
  • HBC: High-profile Bottom Cover. Wiring clearance below backplane 49mm.
/CS Chassis Card-cage Slot
  • MCS: Universal Card-cage Slots (Mixed Conduction-cooled & Air-cooled Boards).
  • CCS: Conduction cooled Card-cage Slots (Conduction-cooled Boards Only).
/F Rear-mounted Fan Assembly
  • STDF-DC: 2x 42 CFM DC Rugged Fans.
  • STDF-AC: 2x 47 CFM 115 VAC @ 400Hz Rugged Fans.
  • F115-400: 2x 65 CFM Rotron PX2 Military Fans fitted for 115 VAC @ 400Hz.
  • F200-400: 2x 120 CFM Rotron PX2 Military Fans fitted for 200 VAC 3-phase @ 400Hz.
/C Chassis Color
  • 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).
Part Number Example:
CM-ATR-3U/HES/VPX/90-264VAC/C-575W/UDP/HETC/SBC/CCS/STDF-AC/YW
  • 1/2 ATR, 5 slot, 3U Avionics Enclosure.
  • Sealed with 4 Heat Exchangers, top cover, sidewalls & rear panel.
  • 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.
  • Conduction Card-cage Slots (Conduction-cooled Boards Only).
  • 2x 47 CFM 115 VAC @ 400 Hz Rugged Fans.
  • Enclosure color is yellow.