3U ATR PENTAHEX-HP Description

Sealed, 1" pitch, high performance dry-air 3U chassis incorporates five heat exchangers, multi slot heat pipes and air re-circulation fans inside. This conventional format chassis is ideal for applications where ambient air is laden with hostile or harmful contaminants.

Heat generated within the enclosure is conducted to the hollow sidewalls, bottom cover, 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. Integrated card-cage slot heat pipes provide fast passage for heat to exit the internal card-cage. Internal air recirculation fans ensure constant airflow across modules.

CM-ATR-3U/PENTAHEX-HP

The 3U PENTAHEX-HP chassis is available in 3, 5, 7 & 9 slot versions, supporting Gen 4/5 VPX backplanes. A total PSU power of up to 1075 watts may be installed. Custom modifications can be designed upon customer request.

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.

Conventional "front-to-back" configuration allows for convenient application upgrade and expansion, keeping the same PSU, Front Panel and Fan Packs across systems. The chassis card-cage is designed for wedgelock IEEE P1101.2 conduction-cooled card types.

3U Backplanes

The CM PENTAHEX-HP series support only VPX backplanes. Bus slots are tailored for 1 inch pitch standard & deliver full compatibility with 0.8 inch pitch 3U modules.

CM enclosures incorporate a conduction-cooled slot card-cage that accepts all off-the-shelf Conduction Cooled 3U modules.

All 3U backplanes install specific TTL logic circuitry for driving up to 16 front panel user LED indicators.

All PENTAHEX-HP backplanes integrate a Chassis Supervisory System (CSS) for temperature (fans and heaters) and Power Supply control. Remote optoisolated control switches for ‘Battle-short’ & chassis PSU ‘on/standby’ are fitted as standard.

VPX backplanes conform to VITA 46 / 65 / 66 / 67 (≥ Gen 5).

CM 3U military backplanes allow unlimited pin I/O wiring capability. Flexible bottom wiring integration is facilitated by a standard 50mm 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 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 PENTAHEX-HP Power Supplies

3U PENTAHEX-HP chassis PSUs support a wide variety of DC input voltages (MIL-STD-704 & MIL-STD-1275) and DC power output combinations up to 1075 Watts developed in alignment with the SOSA™ Technical Standard. Available in two high power versions according to number of system slots to suit the demand per DC Line of SOSA COTS Solutions.

CM-PS-3U/PENTAHEX-HP

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.

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 PENTAHEX-HP 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 PENTAHEX-HP 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.

Rear Fans

3U PENTAHEX-HP chassis fit twin Military PX3 fans as standard (-54°C to +125°C), delivering 200 to 400CFM.

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.

Heat Pipes

Integrated heat pipes remove heat directly from the chassis card-cage, providing an "expressway" to the ambient environment.

Capabilities

Contaminant-free enclosure
VPX (1" Pitch)
Accepts Conduction-cooled 3U Modules only
Flexible Bottom I/O wiring
In-line EMI/EMC MIL-STD-461G Filter
Integrated Chassis Supervisory System (CSS)
55°C less than conventional 3U ATRs
Dramatically increases payload MTBF by 8x*
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 PENTAHEX-HP Specifications

	PENTAHEX3-HP	PENTAHEX5-HP	PENTAHEX7-HP	PENTAHEX9-HP
WIDTH	155 mm	155 mm	155 mm	155 mm
HEIGHT	280 mm	280 mm	280 mm	280 mm
DEPTH	310 mm	361 mm	412 mm	463 mm
WEIGHT	6.2 Kg	7.4 Kg	8.2 Kg	9.0 Kg
CGTR COEFF	ΔT/W = 0.071°C	ΔT/W = 0.054°C	ΔT/W = 0.046°C	ΔT/W = 0.040°C
SLOTS	3	5	7	9
HEAT PIPES	4 - ⌀ 8mm	8 - ⌀ 8mm	12 - ⌀ 8mm	16 - ⌀ 8mm
PSU OUTPUT	S-575W : +12 VDC @ 42A, +3.3 VDC @ 23A \| S-1075W : +12 VDC @ 84A, +3.3 VDC @ 23A
PSU V-INPUT	28 VDC ±30%, 48 VDC ±30%, 72 VDC ±30%, 270 VDC ±30%
STD BACKPLANE	3U 1” pitch (3, 5, 7 & 9 slot) - MULTIGIG RT 3 - PCIe 16 Gbaud & 100 GBASE-KR4 (25.78125 Gbaud)
BOARD FORMAT	CCS: Conduction-cooled slots only ANSI-VITA 48.2 boards
INTERNAL FAN	40.5 CFM	54 CFM	67.5 CFM	81 CFM
F115-400	200 CFM (Rotron PX3)
F200-400	400 CFM (Rotron PX3)
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/PENTAHEX3-HP	CM-TR-3U/PENTAHEX5-HP	CM-TR-3U/PENTAHEX7-HP	CM-TR-3U/PENTAHEX9-HP

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

Generic Part Number:

CM-ATR-3U /CT /B /I /W /FP /TC /BC /F /G /C

/CT Enclosure Cooling Technique

CM-ATR-3U/PENTAHEX3-HP: Sealed, 3 Slot, 5 Heat Exchangers + 12 Heat Pipes.
CM-ATR-3U/PENTAHEX5-HP: Sealed, 5 Slot, 5 Heat Exchangers + 16 Heat Pipes.
CM-ATR-3U/PENTAHEX7-HP: Sealed, 7 Slot, 5 Heat Exchangers + 20 Heat Pipes.
CM-ATR-3U/PENTAHEX9-HP: Sealed, 9 Slot, 5 Heat Exchangers + 28 Heat Pipes.

/B Backplane Type

VPX: VITA 46 Military 3U VPX Backplane (1" Pitch).

/I PSU Input Power Voltage

28VDC: 28 VDC Input.
48VDC: 48 VDC Input.
72VDC: 72 VDC Input.
270VDC: 270 VDC Input.

/W Power Supply Unit

S-575W: SOSA™ Aligned (+3.3 VDC @23A, +12 VDC @42A)**.
S-1075W: SOSA™ Aligned (+3.3 VDC @23A, +12 VDC @84A)**.

** Power supply has been developed in alignment with the SOSA™ Technical Standard.

/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

HETC: Heat Exchanger Top Cover.

/BC Chassis Bottom Cover

HEBC: Heat Exchanger Bottom Cover (50mm wiring clearance).

/F Rear-mounted Fan Assembly

F115-400: 2x 100 CFM Rotron PX3 Military Fans fitted for 115 VAC @ 400Hz.
F200-400: 2x 200 CFM Rotron PX3 Military Fan fitted for 200 VAC 3-phase @ 400Hz).

/G Fan Finger Guards

EMIG: EMI shielding finger guards with honeycomb filter fitted as standard.
ANF: Optional finger guards with low acoustic noise filter (-4dB).

/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/PENTAHEX5-HP/VPX/28VDC/S-575W/UDP/HETC/HEBC/F115-400/EMIG/B

5 slot, 3U Avionics Enclosure.
Sealed, conventional front-to-back ATR with 5 Heat Exchangers, bottom cover, top cover, sidewalls & rear panel + Heat Pipes.
5 slot, 3U VPX backplane.
115VAC @ 400 Hz input power supply.
S-575W Power Supply (+3.3VDC @ 23A, +12VDC @ 22A).
User defined front panel layout (requires customer drawing).
Heat Exchanger Top Cover.
Heat Exchanger Bottom Cover (50mm clearance).
2x 100 CFM 115 VAC @ 400 Hz Military Fan.
EMI shielded finger guards.
Enclosure color is black.

3U ATR with 5 Heat Exchangers and Multi Slot Heat Pipes