BajaPPC-750 User's Manual - Emerson Network Power

BajaPPC-750 Setup 2-15
2.3.1 Providing Power
2.3.2 Providing Air Flow
Be sure your power supply is sufficient for the board. Without a PMC module, the
BajaPPC-750 requires about 30 watts maximum. With two PMC modules, the
requirement is approximately 45 watts maximum. Power supply ripple and noise
below 10 MHz should be limited to 50 mV peak-to-peak (a requirement of the
VMEbus specification). Power requirements for the BajaPPC-750 are shown in
Table 2-3.
NOTE. VMEbus connectors P1 and P2 must be used to meet BajaPPC-750’s
power requirements. Fuses select whether the P1 connector or the onboard
regulator provides +3.3-volt power signals for the PMC module(s).
Both power sources have a current limit of 1 Amp (see also
Chapter 5).
Table 2-3. Power Requirements
Voltage Range Maximum
(volts) (volts) Current
+3.3 ±5% 1 ampa +5 ±5% 4 amps b
+12 ±5% 100 milliampsc -12 ±5% 100 milliampsc As with any printed circuit board, be sure that there is sufficient air flow to the
board to prevent overheating. The environmental requirements are specified as:
Operating temp. 0 to +55 degrees Centigrade, ambient (at board)
Relative humidity 0% to 95% (non-condensing)
Storage temperature –40 to +85 degrees Centigrade, ambient
CAUTION. High operating temperatures will cause unpredictable operation
or permanent failure. Because of the high power requirements
of the CPU, fan cooling is required for all
configurations, even when boards are placed on extenders.
0002M621-15
Usage
PMC module dependent
All logic
PMC module dependent
PMC module dependent
a. Many modules do not require the +3.3V supply.
b. Current is measured during an on-card memory test, without a PMC module.
c. Estimated