Cooling Requirements - Motorola MVME2300SC Series Installation And Use Manual

Table A-1. MVME2300SC Specifications (Continued)
Characteristics
Asynchronous serial
debug port
Front panel switches
and status indicators
Note

Cooling Requirements

The Motorola MVME2300SC VME processor module 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 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 VME system 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 that
component vendors' specifications are not exceeded.
A-3
TL16C550 UART
Front panel I/O through RJ45 connector; VMEbus P2 I/O
Reset and Abort switches
Four LEDs: BFL, CPU, SCON, FUS
The power requirement listed for the MVME2300SC 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 MVME2300SC: +3.3V, +5V, +12V, and
–12V.
Cooling Requirements
Specifications
A