Technical data

Hardware Preparation and Installation
MVME2502 Installation and Use (6806800R96B)
30
2.3.2 Power Requirements
The board uses +5.0 V from the VMEbus backplane. On board power supply generates the
required voltages for the various ICs. The MVME2502 connects the +12 V and -12 V supplies
from the backplane to the PMC sites, while the +3.3 V power supplied to the PMC sites comes
from the +5.0 V backplane power. A maximum of 10 A of +3.3 V power is available to the PMC
sites, however the 90 W +5.0 V limit must be observed as well as any cooling limitations.
The following table provides an estimate of the typical and maximum power required.
Product Damage
 High humidity and condensation on the board surface causes short circuits.
 Do not operate the board outside the specified environmental limits.
 Make sure the board is completely dry and there is no moisture on any surface before
applying power.
Table 2-2 Power Requirements
Board Variant Maximum (Calculated) Typical (Measured Operating)
MVME2502-02120201E 28.93W 21.8
MVME2502-02120201S 28.93W 21.8
MVME2502-02100202E 23.33W 16.6
MVME2502-02100202S 23.33W 16.6
The power is measured when the board is in standby (Linux prompt). Power will significantly
increase when adding hard drives or a XMC/PMC card.