Motorola MVME956AC, MVME956UM2 user manual Chassis Cooling Considerations

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General Information

❏This equipment is intended for use in a relatively clean environment (office or lab). In some industrial environments, you may need to provide additional protection against airborne contaminants in order to assure reliable operation of the floppy disk and magnetic tape drives and media.

❏This equipment is intended for use in an enclosure consisting of the front bezel together with the Motorola top panel and side panels or equivalent. Operating this equipment without a front bezel may compromise compliance with RFI and/or product safety regulations. It may expose the operator to electrical and mechanical hazards.

Chassis Cooling Considerations

!

The system integrator must ensure that all modules used in the

system are properly cooled. The following information will

Caution

help you to determine whether the cooling is adequate.

The MVME956AC chassis is designed for an input air temperature below

40degrees Celsius. Three DC-powered fans provide forced-air cooling for the power supply, mass storage enclosure, and VME modules. The direction of air flow is: in at the bottom of the chassis, past the power supply and VME modules, and out the top of the chassis. The 24-volt fans deliver 81 CFM at zero inches of water. An air filter is optional.

The fans provide airflow sufficient for most VME modules, but some high- density, high-power modules may require more cooling than this enclosure provides. When integrating VME modules that are known to be difficult to cool, testing is advisable to confirm that such modules are properly cooled.

No forced air cooling is provided for the rear-mounted modules. The rear- mounted modules are typically transition modules with few active components, and cooling is generally not required.

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Contents MVME956AC VME Chassis User’s Manual Restricted Rights Legend Preface Page Safety Summary Safety Depends On You Regulatory Notices Industry Canada Page Contents Support Information List of Figures List of Tables Features OverviewGeneral Description Chassis Description and Specifications Power Supply Description and Specifications MVME956AC Chassis SpecificationsSlot VME Bus Backplane Specifications VME Bus Backplane Description and SpecificationsPower Supply Limit Considerations Safety and Regulatory Compliance General Precautions Operating EnvironmentChassis Cooling Considerations Hardware Preparation Hardware Preparation ItemsRelated Documentation Document Title Motorola Publication NumberChassis Installation Instructions Benchtop OperationInstall the Desktop Cover Kit Cover Kit Rack Mounting Option Cover Kit RemovalFCC, VDE Operating Procedures Controls and IndicatorsPower Control Procedure Backplane Power Physical DescriptionBackplane Bus Connectors VME64x Bus Interface Signal TerminationBackplane Preparation Slot Backplane Connectors and Headers Rear View Install the Daisy-Chain Jumpers Power Monitor Connection Pin AssignmentsLive Insertion Backplane Daisy-Chain Jumper Wiring Removal and Replacement Procedures Power Supply RemovalPower Supply Replacement Power Supply Removal/ReplacementPower Supply Disk and Tape Drive Disk/Tape Drive Removal Removal and Replacement Procedures VME64x Bus Backplane Backplane Mounting Card File Removed Replacement Cooling Fan Cooling Fan Removal/Replacement Optional Air Filter Kit Drawings/Wiring Diagram IntroductionParts Lists MVME956AC Chassis Parts ListParts Lists MVME956AC-AC Major Assemblies Model Part Common Description Number NameMVME956AC Chassis Assembly, 1 MVME956AC Chassis Assembly, 2 MVME956AC Wiring Diagram Index IN-2

MVME956AC, MVME956UM2 specifications

The Motorola MVME956UM2 and MVME956AC are advanced embedded computing platforms designed for high-performance industrial and military applications. These ruggedized computing solutions cater to various sectors, including telecommunications, aerospace, and defense, providing a reliable foundation for real-time processing and data acquisition tasks.

One of the distinguishing features of the MVME956UM2 and MVME956AC is their robust architecture, based on the PowerPC processor. The MVME956UM2 generally offers a PowerPC 750 microprocessor, operating at clock speeds of up to 600 MHz, while the MVME956AC may leverage a higher performance variant for enhanced computing capabilities. This processor architecture enables efficient execution of complex applications and multi-threading operations, making it suitable for demanding environments.

Both models support advanced memory configurations, accommodating up to 512 MB of RAM and several megabytes of non-volatile flash memory. This flexibility allows developers to design applications with substantial data handling requirements, such as real-time analytics or extensive data logging.

Another notable aspect of the MVME956 series is its modular design, which facilitates easy integration with various I/O modules and communication interfaces. The board features multiple Ethernet ports supporting both 10/100Base-T and Gigabit Ethernet, enabling high-speed data transfer across networks. Additionally, with support for PCI, USB, and other serial communication standards, developers can create customized solutions tailored for specific application needs.

Durability is one of the key characteristics of the MVME956 models. They are built to withstand extreme environmental conditions, including a wide temperature range, vibration, and shock. This makes them ideal for use in aircraft, naval vessels, and other challenging settings where reliability is paramount.

The MVME956AC also offers enhanced graphics support, with the ability to drive advanced visual displays for monitoring and control tasks. This feature is particularly advantageous in situations where real-time visual feedback is critical, such as in control rooms or manned military operations.

In summary, the Motorola MVME956UM2 and MVME956AC represent powerful, versatile computing platforms tailored for demanding applications. With their advanced processing capabilities, expansive memory, rugged design, and extensive I/O options, these embedded systems are well-suited for a variety of industrial and defense environments, making them a preferred choice among engineering professionals.
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