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Mains Power Installation
Category II
Cooling Specifications
Cooling
Specification
Charts
56 HP E8401A, E8403A Product Specifications
+5VSTDBY: Power may be provided by the user to the +5VSTDBY bus on
the VXI backplane.
Current:
Voltage Range: 5.25V Max, 4.875V Min
Connector: Pins 8 and 21 of the Diagnostic Connector.
Chassis Ground Connection:M4 x 0.7 threaded nut insert on rear panel.
High performance impeller provides cooling air to modules. Unique air
distribution system (patent applied) and positively-pressurized plenum
provide quiet operation and uniform airflow from slot to slot and from front
to rear of modules. Outstanding back pressure performance insures airflow
through dense modules. Separate power supply cooling fan(s) provides an
independent air path for reliable cooling of power supply.
5.0
4.0
Pressure Drop
Across Module
(mm H
0)
3.0
2
2.0
1.0
0.0
•
VXI-8 Specification Draft 2.0. Fixture revision 1.7.
•
VXI-8 Standard Modules installed in all other slots.
•
Performance shown for Worst Slot (slot 1) and Best Slot (slot 10).
•
Front-to-Rear Variance 13% worst case. Typically 10%-12% in most
slots.
•
Fans on Full Speed. Minimum airflow is approximately 50% with
fans on Variable Speed.
•
Air Filter Kit not installed. Airflow is reduced approximately 10%
with clean air filters installed.
•
Measurements taken at 1,500m altitude.
1A Max
Best Slot
Worst Slot
2.0
4.0
6.0
Airflow Through Module (liters/sec)
8.0
10.0
12.0
Appendix A
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