Publication No. 500-9300527837-000 Rev. A.0
Installation and Power Up/Reset 21
4 • Installation and Power Up/Reset
Review
before installing the SBC347A. The
following notices also apply:
CAUTION
Consult the enclosure documentation to ensure that the SBC347A’s power requirements are
compatible with those supplied by the backplane.
4.1 Power Supply Requirements
The SBC347A requires the backplane to provide 5 V (VS3) and 3.3 V (VS2 and
3V3_AUX) supplies. Approximate requirements are as follows:
The VBAT supply may be used to power the Real Time Clock (RTC) in isolation
when the board is powered down, to maintain the time/date information. This
requires up to 6 µA at 3.3 V ±5%.
See
for more details.
4.2 Board Keying
The keying pins are used to define slot-specific keying. The SBC347A is delivered
with module keying devices of the unkeyed type, to allow the board to be fitted to
any backplane slot.
Contact the factory to discuss any specific keying requirements.
Table 4-1 Power Supply Requirements
Supply
Current Requirement VPX Specification Limits
VS3
Up to 9.0 A
+5 V +5% to -2.5%
VS2
Up to 3.0 A
+3.3 V +5% to -2.5%
3V3_AUX
Up to 0.8 A
+3.3 V ±5%
