9485/9487 DC Power Supply
2
Expansion Options
Table 1 lists the available power from the supply.
Table 1. Available Power
486- or Am5x86® Processors
Pentium® Processors
+5 VDC @ 3.8 A
+5 VDC @ 2.6 A
+12 VDC @ 3.2 A
+12 VDC @ 3.2 A
-5 VDC @ .45 A
-5 VDC @ .45 A
-12 VDC @ .45 A
-12 VDC @ .45 A
Total not to exceed 45 W
Total not to exceed 35 W
System Power
Proper grounding is essential to all safe electrical installations. Applicable Fed-
eral/State/Provincial codes provide data such as the size and types of conductors,
color codes, and connections necessary for safe grounding of electrical components.
The code specifies that a grounding path must be permanent (no solder), continuous,
and able to safely conduct the ground-fault current in the system with minimal im-
pedance. The following practices should be observed:
•
Terminate protective Earth Ground to the enclosure chassis near the point of entry.
In a noisy environment, local ground rod may be necessary.
•
All electrical racks or chassis and machine elements should be grounded to a central
ground bus (a “star” ground bus is best).
•
The enclosure should be properly grounded to the ground bus. Make sure a good
electrical connection is made at the point of contact with the enclosure.
Line Voltage Considerations
The 9485/9487 DC power supply is built to sustain line fluctuations of 20 - 25 VDC
and still allow the system to function within its operating margin. As long as the in-
coming voltage is adequate, the power supply provides all the logic voltages neces-
sary to support the processor, memory, and I/O.
Power Connector Pinouts
Figure 2. Power Connector
Summary of Contents for 9485
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