AITECH E108

COMPACT AND LIGHTWEIGHT WITH 6 STANDARD VME64X SLOTS

Manufacturer: Aitech
AITECH E108
Introduction

Aitech's E108 Convection/Radiation cooled VME computer enclosure is built to be rugged and reliable as well as lightweight and compact. EMI/RFI protected and environmentally sealed, the E108 is capable of withstanding extreme environmental conditions of temperature, humidity, shock, vibration, EMI and chemical exposure. This makes it ideal for use in harsh locomotive environments.

STURDY MECHANICAL DESIGN

The E108 is constructed of durable CNC machined 6061-T6 aluminium. Fasteners are stainless steel and often-used threads have self-locking 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 natural convection and radiation cooling without sacrificing ruggedness. Designed with a built-in lifting handle, the E108 is also equipped with hooks and mounting holes to
facilitate installation in standard 1/2-ATR short mounting trays. Optional mounting side flanges are available for hard mounting to a shelf.

BOARD CAPACITY

The E108 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 280), can be routed to front panel I/O connectors. The backplane is designed to mate with the Front Panel I/O Transition Board (see below) using high density connectors.

FRONT PANEL

The front panel features a flexible configuration of connectors that conform to military standards, one for input power and all others for I/O. It may also be equipped with any of the following options: LED indicator to track system operation, On/Off switch, and external grounding screw.

ENCLOSURE SPECIFICATIONS

GeneralRugged Chassis for Locomotive Applications
Designed for Harsh Mechanical, Climatic, Chemical and Electrical Stresses
CapacityThe E108 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.
PSUUses the Aitech P232 PSU
150 Watt Output with 85% Efficiency (typical)
Very wide input voltage range: 50 - 90 Vdc
EN 50155 Input Compliance
EMI/RFI Input Filter and Input Transient Protection
Outputs: 5 V, 3.3 V, ±12 V
Output Over/Undervoltage and Short-Circuit Protections
Equipped with all VME64x control signals: ~ACFAIL, ~SYSRST and ~SYSFAIL
4 ms Holdup Time
Input/Output and Chassis Isolation
Thermal Shutdown and Reverse Polarity Protection
Internal BIT Status and Alarms for Voltages and Currents
CoolingThe heat generated by cards in the enclosure is conducted through the aluminium back and sidewalls and dissipated by the exterior fins to the surrounding air by means of natural convection and, to a lesser degree, radiation; external forced-air or base plate cooling are not required.
IP/NMEAThe E108 is sealed against humidity, raindrops and splash. Enclosure mating surfaces are sealed with hollow silicone rubber seals. Connectors and other accessories are protected in the same manner.

GENERAL

ExpansionVME64x compliant
Electrical150 Watt Output with 85% Efficiency (typical)
Very wide input voltage range: 50 - 90 Vdc
EN 50155 Input Compliance
See datasheet for individual rail figures
MechanicalStandard 1/2-ATR short mounting footprint: 4.88 x 12.62 in (W x D)
Maximum external dimensions with fins and handle: 6.5 x 15.7 x 7.62 in (W x D x H)
TemperatureOperating Temp.
• Ser 200 level Enclosure: -40C to +71C
• Ser 400 level Enclosure: -55C to +71C
Non-operating Temp.
• Ser 200 level Enclosure: -50C to +85C
• Ser 400 level Enclosure: -62C to +100C
Humidity5%-95% relative humidity with condensation
WeightLess than 15 lbs without boards.
AltitudeOperating: Up to 15,000 ft
Storage: Up to 40,000 ft
VibrationSine**: Cycling of 5 g (max) at 5 to 500 Hz
Random**: 10 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
Warranty1 Year
RoHSCompliant
Recab UK
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