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General Information
1
Power requirements
(with both EPROM
sockets populated and
excluding external
LAN transceiver)
Operating temperature (refer to
Cooling Requirements section)
Storage temperature
Relative humidity
Physical dimensions
PC board with mezzanine
module only
Height
Depth
Thickness
PC boards with connectors and
front panel
Height
Depth
Thickness
1-4
more favorable thermal conditions, it may be possible to operate
the module reliably at higher than 55û 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.
Forced air cooling is required for the Atlas motherboard.
Additional cooling is required with the installation of the MPC604
RISC processor. A 3-pin header (J17) is provided on the
motherboard for powering a dedicated fan. Refer to the Cooling
Requirements section in the General Information chapter for
temperature qualification information for the system board
platform.
Table 1-3. MVME177 Specifications
Characteristics
SpeciÞcations
+5 Vdc (± 5%), 4.5 A (typical), 6.0 A (max.)
(at 50 MHz, with 128MB ECC DRAM)
+12 Vdc (± 5%), 100 mA (max.)
(1.0 A (max.) with offboard LAN
transceiver)
-12 Vdc (± 5%), 100 mA (max.)
0û to 55û C at point of entry of forced air
(approximately 490 LFM)
-40û to +85û C
5% to 90% (non-condensing)
Double-high VMEboard
9.187 inches (233.35 mm)
6.299 inches (160.00 mm)
0.662 inches (16.77 mm)
10.309 inches (261.85 mm)
7.4 inches (188 mm)
0.80 inches (20.32 mm)
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