Cooling Requirements - Motorola MVME2400 Series Installation And Use Manual

Characteristics
Asynchronous serial
debug port
Front panel: switches
and status indicators
Note

Cooling Requirements

The MVME240x VME processor Module is 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 of the entire assembly (base board and
modules) at a velocity typically achievable by using a 100 CFM axial fan.
Temperature qualification is performed in a standard Motorola
VMEsystem chassis. Twenty-five-watt load boards are inserted 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 first 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.
http://www.motorola.com/computer/literature
Table A-1. Specifications (Continued)
PC16550
Front panel I/O through RJ-45 connector
Reset and Abort switches
Four LEDs: BFL, CPU, PMC (one for PMC slot 2, one for slot 1)
The power requirement listed for the MVME240x does not
include the power requirements for the PMC slots. The PMC
specification allows for 7.5 watts per PMC slot. The 15 watts
total can be drawn from any combination of the four voltage
sources provided by the MVME240x: +3.3V, +5V, +12V, and
–12V.
Cooling Requirements
Specifications
A
A-3