Revision 01
December 22, 1997
150-319-142-01
28
PairGain Engineering - Plant Series
HLU-319 List 4B
Power Consumption
The most important power demands of an HLU-319 List 4B on the shelf
power supply are its maximum power consumption, its maximum power
dissipation, and its maximum current drain. These three parameters for the
HLU-319 List 4B are as follows:
•
Maximum Power Dissipation: per slot = 4.0 Watts
•
Maximum Power Consumption: per slot = 4.8 Watts
•
Maximum Current Drain: per slot = 113 mA at -42.5 volts
Maximum Power Dissipation measures the power converted to heat buildup
within the unit. It contributes to the total heat generated in the space around
the unit. It determines the maximum number of fully loaded shelves per bay
that does not exceed the maximum allowable power dissipation density in
watts/sq. ft.
The Maximum Current Drain is the maximum current drawn from the shelf
power supply when it is at its minimum voltage (-42.5 V). It determines the
shelf fusing requirements.
Heat baffles should be placed between every shelf to deflects the rack’s heat
outward and reduces thermo stress on the plugs.
B
BLK
The DS0 blocking option can only be set via the Craft port
with a terminal. The four-character HLU-319 List 4B front
panel display gives the status of the blocking option. BLK, on
the front panel display, indicates at least one channel is
blocked.
NONE*
No channels are blocked.
Table 3.
HLU-319 List 4B System Setting Menu Options (Continued)
Option
Parameter
Description
* Indicates HLU-319 List 4B factory (default) settings. (Continued)
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