3com Hub 1000 SX Manual De Usuario

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Using Optional Power Systems
2-9
Power Modules
At least one SuperStack II Advanced Redundant Power System 
Power Module Type 2 is required for each SuperStack II hub that you 
want to protect. The Hub 1000 SX requires the 100-watt, 3.3-volt version 
of the module (part number 3C16074). 
One Advanced RPS with Power Modules configured with straight cables for 
standard usage can contain a maximum of four 100-watt Power Modules 
(and four 60-watt Power Modules), or eight 60-watt Power Modules. If 
each Power Module is configured for full redundancy with a SuperStack II 
Advanced Redundant Power System Y Cable Type 2 (part number 
3C16079), an Advanced RPS can contain a maximum of eight 100-watt 
Power Modules, supporting as many as four Hub 1000 SX units.
Using the cable supplied with the Power Module, you connect the 
Power Module to the DC power connector located on the rear panel 
of the Hub 1000 SX. (For the DC power connector location, see 
Figure 2-1.) 
In the event of a failure in a Power Module, an alert is automatically 
sent to the Advanced RPS management console software.
Cabling Options
You can supply AC power and DC power to the Hub 1000 SX 
simultaneously, so that if an AC power failure occurs, the hub 
switches to DC power supplied by the Advanced RPS unit. You can 
also supply only DC power to the hub with the Advanced RPS unit.