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Diamond Point International

Aitech E105 - 1/2-ATR Short Fan-Cooled VME Enclosure

Compact and Lightweight Environmentally Sealed Chassis with 5 Standard VME64 Slots

Introduction

Aitech's E105 Fan-cooled VME computer enclosure is built to be rugged and reliable as well as lightweight and compact. EMI/RFI protected and environmentally sealed, the E105 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 E105 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 internally finned (to create air tunnels), for cooling by the forced air from the integral fan.Designed with a built-in handle, the E105 is also equipped with hooks and mounting holes to facilitate installation in standard 1/2-ATR short mounting trays. The enclosure is also available with optional mounting brackets for base plate hard mounting.

Board Capacity

The E105 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 and automatic Daisy Chain. 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.

Specification

Enclosure Specifications

GeneralRugged Chassis for Mobile Military/Aerospace Applications
Designed for Harsh Mechanical, Climatic, Chemical and Electrical Stresses
Environmentally Sealed
Compact and Lightweight with Five (5) Standard VME Slots
Internally Conduction-Cooled; Externally Forced Air-Cooled with Integral Temperature Controlled Fan Unit
Fully Sealed Faraday Cage and Complete EMI/RFI Power Line Filtering
Multi-Output Integral 28Vdc Input Power Supply
Backplane I2C Temperature Sensors, Voltage Monitors, and Electronic ETR
Customization Options: Front Pane, I/O Connectors, I/O Harnessing, Mounting and Finish
CapacityThe E105 accommodates 5 standard VME boards with 0.8 inch pitch, including:
• IEEE 1101.2 conduction-cooled VME cards
• Commercial VME boards without front panels
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 E105 does not require external forced air or base plate cooling. Thermal design of the enclosure is based on internal heat conduction
and external forced convection. The boards and power supply in the enclosure are cooled by conducting their heat to the enclosure interior sidewalls. External cooling is accomplished by means of the system fan blowing cooling air through shrouded heat exchangers on the exterior sidewalls of the enclosure. Heat conducted from the boards and power supply inside the chassis is conducted through the aluminum sidewalls from which it is carried away by the cooling air. The fan is temperature controlled and operates when enclosure temperature exceeds the point
of self- sustained heat dissipation.
IP/NMEAThe E105 is sealed against humidity and splash. Enclosure mating surfaces are sealed with hollow fluorosilicone rubber seals. Connectors and other accessories are protected in the same manner.

General

ExpansionVME64 compliant
ElectricalSee above for PSU specification
Power Dissipation Capability: More than 100 W at 71 °C ambient air temperature, with maximum 85 °C at card edge, at sea level.
MechanicalStandard 1/2-ATR short mounting footprint: 4.88 x 12.62 in (W x D)
Maximum external dimensions with fan housing and handle: 4.88 x 17.75 x 7.7 in (W x D x H)
TemperatureOperating Temperature
• Ser 200 level Enclosure: -40 °C to +71 °C*
• Ser 400 level Enclosure: -55 °C to +71 °C*
Non-operating Temperature
• Ser 200 level Enclosure: -50 °C to +85 °C
• Ser 400 level Enclosure: -62 °C to +100 °C
Humidity5%-95% relative humidity with condensation
WeightLess than 14.5 lbs. (without boards)
VibrationSine Cycling of 5*/8** g (max) at 5 to 500 Hz
Random 10*/16** Grms at 20 to 2000 Hz
Transportation Loose cargo vibration
* Hard mounted
** Mounted on isolators
ShockSingle half-sine shocks:
40*/65** g peak
3 axes
11 ms duration
* Hard mounted
** Mounted on isolators
EMCDesigned to meet the emanation and susceptibility limits of MIL-STD-461, as per MIL-STD-462 requirements, CE102, CS101, CS114, & RE102.
Warranty1 Year
RoHSCompliant

Ordering Details

BoardRefer to datasheet for ordering part number scheme
AccessoriesN/A