Power Requirements; Table 2-2 Power Requirements - SMART Embedded Computing MVME2502 Installation And Use Manual

Hardware Preparation and Installation
2.3.2

Power Requirements

The board uses +5.0V from the VMEbus backplane. On-board power supply generates
required voltages for various ICs. The MVME2502 connects the +12V and -12V supplies
from the backplane to the PMC sites, while the +3.3V power supplied to the PMC sites
comes from the +5.0V backplane power. A maximum of 10A of +3.3V power is available to
the PMC sites, however the 90W +5.0V limit must be observed as well as any cooling
limitations.
The following table provides an estimate of the typical and maximum power required.
Table 2-2
Board Variant
MVME2502-02120201E
MVME2502-02120201S
MVME2502-02100202E
MVME2502-02100202S
The power is measured when the board is in standby (Linux prompt) mode. Power
will significantly increase when adding hard drives or a XMC/PMC card.
The following table shows the power available when the MVME2502 is installed in either a
three row or five row chassis and when PMCs are present.
Chassis Type
Three Row
Five Row
Keep below power limit. Cooling limitations must be considered.
36
Power Requirements
Available Power
70W maximum
90W maximum
Hardware Preparation and Installation
Maximum (Calculated)
28.93W
28.93W
23.33W
23.33W
MVME2502 Installation and Use (6806800R96G)
Typical (Measured
Operating)
21.8
21.8
16.6
16.6
Power With PMCs
below 70W
below 90W