Name: MVME165A MOTOROLA Power Contractor NEW
Price: 4322 CNY
Availability: InStock

Description

Cooling Requirements
Tbe Motorola MVME165A VMEmodule is specified. designed. and tested to operate reliably with an incoming air temperature range from 0″ to 55″ C (32″ to 131″ F) with forced air cooling at a velocity typically achievable by using a 100 CFM axial fan. Temperature qualification is performed in a standard Motorola VMEsystem 1000 chassis. Twenty-five watt load boards are insened in two card slots. one on each side, adjacent to the board under test, to simulate a high power density system configuration. An assembly of three axial fans. rated at 100 CFM per fan. is placed directly under the VME card cage. The incoming air temperature is measured between the fan assembly and the card cage, where the incoming airstream rrrst encounters the module under test. Test software is executed as the module is subjected to ambient temperature variations. Case temperatures of critical. high power density integrated circuits are monitored to ensure component vendors specifications are not exceeded. While the exact amount of airflow required for cooling depends on the ambient air temperature and the type, number, and location of boards and other heat sources,adequate cooling can usually be achieved with 10 CFM and 490 LFM flowing over the module. Less airflow is required to cool the module in environments having lower maximum ambients. Under more favorable thermal conditions, it may be possible to operate the module reliably at higher than 55· C with increased airflow. It is important to note that there are several factors, in addition to the rated CFM of the air mover, which determine the actual volume and speed of air flowing over a module.
FFC Compliance
The MVME165A was tested in an FCC-compliant chassis, and meet the requirements for Class A equipmenL FCC compliance was achieved under the following conditions: 1. Shielded cables on all externall/O ports. 2. Cable shields are connected to earth ground via metal shell connectors bonded to a conductive module front panel. 3. Conductive chassis rails connected to earth ground. This provides the path for connecting shields to earth ground. 4. All chassis and MVME165 front panel attachment screws are properly tightened. For minimum RF emissions, it is essential that the conditions above be implemented; failure to do so could compromise the FCC compliance of the equipment containing the module.

MVME165A PDF
MOTOROLA MVME165A

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