HP 300

Chapter 3
Functional Description
Power Supply
General Description
Both Series 300 Computers and HP 98568 Bus Expander use this power supply. The 0950-1760
power supply provides all power to the assemblies installed in the computer or bus expander. It
is a non-adjustable switching supply that is an exchange assembly.
Power Supply Characteristics
Power supply outputs are:
• +5 V dc
• +12Vdc
• -12 V dc
• Power-Up RESET
Maximum power consumed by the computer or bus expander is 250 watts. For the computer,
power consurnption by the power supply
and assemblies in the system slots is included in this
figure.
The remaining power is available for assemblies in the computer's accessory card slots.
In
the bus expander, nl0st of the power is available for its accessory card slots.
Table
3-1 shows the power available for eaeh voltage in the accessory eard slots for both the
Series 300 Computers and the HP 98568A Bus Expander.
Table 3-1. Backplane Power Limits
Series 300 Computer
+5 V dc, 31 Watts
+ 12 V dc, 19.2 Watts
-12 V de, 6 Watts
HP 98568 Bus Expander
+5 V dc, 62 Watts
+ 12 V de, 38.4 Watts
-12 V dc, 12 Watts
Functional Description
37
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