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Aitech E103 - 1/2-ATR Short VME Enclosure

Five (5) Slot 1/2-ATR Lightweight Environmentally Sealed VME Enclosure

Aitech E103 - 1/2-ATR Short VME Enclosure
Key Features
Rugged Chassis for Mobile Military Applications
Five (5) Standard VME64x Slots
Compact and Lightweight VME enclosure
Environmentally Sealed
Internally conduction cooled/externally air cooled
MIL-C-38999 or better front connectors
Complete EMI/RFI Filtering
Up to -46C to +60C operating range


Aitech's E103 convection-cooled VME computer enclosure is built to be rugged and reliable as well as lightweight and compact. EMI/RFI protected and environmentally sealed, the E103 is capable of withstanding extreme environmental conditions of altitude, temperature, humidity, shock, vibration, EMI and chemical exposure. This makes it ideal for use in all military environments.

Sturdy Mechanical Design

The E103 is constructed of durable CNC machined 6061-T6 aluminum. Fasteners are stainless steel and often-used threads have selflocking stainless steel helicoils to withstand severe vibration and shock. All connectors are located on the front panel of the enclosure for easy access. Side and back walls are externally finned for radiation and convection-cooling. Designed with a built-in handle, the E103 is also equipped with hooks and mounting holes to facilitate installation in standard 1/2-ATR short mounting trays.

Board Capacity 

The E103 accommodates 5 standard VME boards with 0.8 inch pitch, including:

• IEEE 1101.2 conduction-cooled VME cards
• Commercial VME boards without front panels 

VME Backplane

The backplane is VME64x compliant with 160-pin, 5-row J1/J2 connectors and 95-pin PO connectors in all slots. Any of the pins in rows A and C, and user defined pins in rows Z and D of the J2 connectors, as well as the 95 I/O pins from each of the P0 connectors (up to a maximum of 512), can be routed to front panel I/O connectors.


Enclosure Specifications

GeneralRugged Chassis for Mobile Military Applications
Designed for Harsh Mechanical, Climatic, Chemical and Electrical Stresses
Environmentally Sealed
Compact and Lightweight with 5 Standard VME Slots
Internally Conduction-Cooled; Externally Radiation and Convection-Cooled
Fully Sealed Faraday Cage and Complete EMI/RFI Power Line Filtering
Customized Front Panel Connectors
Multi-Output Removable Power Supply
CapacityThe E103 accommodates 5 standard VME boards with 0.8 inch pitch, including:
• IEEE 1101.2 conduction-cooled VME cards
• Commercial VME boards without front panels
BackplaneThe backplane is VME64x compliant with 160-pin, 5-row J1/J2 connectors and 95-pin PO connectors in all slots.
PSUVoltage Range (DC): 18 V to 36 V
Nominal Input Voltage: 24 V to 28V
Transient Suppression: Meets requirements of:
– MIL-STD-1275AT (except ignition, cranking and single fault conditions)
– MIL-STD-704D
Output: +5v @ 20A, +3.3V @ 11A, +12V @ 1A, -12V @ 1A
Total Output Power: 160 W
Efficiency: >75%
CoolingThe E103 does not require forced air or base plate cooling. Heat is conducted through the aluminum sidewalls and radiated/convected to the surroundings by means of the external vertical fins on the side and back walls of the enclosure.
IP/NMEAThe E103 is sealed against humidity and splash. Enclosure mating surfaces are sealed with hollow silicone rubber O-ring seals. Connectors and other accessories are protected in the same manner.


ExpansionVME64x compliant
ElectricalSee above for PSU specification
Power Dissipation Capability: More than 75W at 60C ambient air temperature (maximum delta T of 25C at card edge).
MechanicalStandard 1/2-ATR short mounting footprint: 4.88 x 12.52 in (W x D)
Maximum external dimensions with fins and handle: 4.88 x 15.75x 7.7 in (W x D x H)
TemperatureOperating Temp: -46C to +60C
Humidity5%-95% relative humidity with condensation
WeightLess than 14 lbs. (without boards)
VibrationSine* Cycling of 10 g (max) at 5 to 500 Hz
Random* 16 g RMS at 20 to 2000 Hz
Transportation Loose cargo vibration
* Hard mounted
ShockSingle half-sine shocks**: 40 g peak, 3 axes, 11 ms duration
** Hard mounted
EMCDesigned to meet the emanation and susceptibility limits of MIL-STD-461, as per MIL-STD-462 requirements, CE102, CS101, CS114, & RE102.
Warranty1 Year

Ordering Details

BoardRefer to datasheet for ordering part number scheme