3Com 3C8227C User Guide - Page 43

Full Redundancy Configurations, Invalid Configurations, Power Module Usage

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Invalid Configurations 43 Full Redundancy Configurations If you want a fully redundant configuration, you can pair power modules (of the same type) in the chassis, provided you use Y-cables of the appropriate type to connect a pair of modules to a single SuperStack unit. The two modules count as one module. This is then subject to the loading limitations and configuration recommendations detailed in Table 2. CAUTION: You must not pair power modules of different types and power ratings, for example, do not pair a 60 W Type 1 with a 100 W Type 1, a Type 2 with a Type 2A or a Type 3, and so on. Invalid Configurations You must not: s Use any configuration where the total output DC power is greater than 480 W (unless you are installing two Type 3 Power Modules). For example, five Type 1 100 W or Type 2 (100W) modules using the standard DC cable supplied with the modules will cause over-heating to occur within the chassis. s Connect a power module to a SuperStack unit whose input DC power exceeds the output DC power of the power module. The documentation that accompanies your SuperStack unit will provide additional information on its compatibility with the Advanced RPS chassis and power modules. Power Module Usage The following lists give, in 3C number order, the SuperStack products that the different power modules can support. If there is an asterisk (*) by the product number, that product has the auto-enable feature. The details are correct at the time of printing this manual, but are subject to change. If you are in doubt, consult the product user guide or your supplier for the latest information.

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Invalid Configurations
43
Full Redundancy Configurations
If you want a fully redundant configuration, you can pair power
modules (of the same type) in the chassis, provided you use Y-cables
of the appropriate type to connect a pair of modules to a single
SuperStack unit. The two modules count as one module. This is then
subject to the loading limitations and configuration
recommendations detailed in Table 2.
CAUTION:
You must not pair power modules of different types and
power ratings, for example, do not pair a 60 W Type 1 with a 100 W
Type 1, a Type 2 with a Type 2A or a Type 3, and so on.
Invalid Configurations
You must not:
■
Use any configuration where the total output DC power is greater
than 480 W (unless you are installing two Type 3 Power Modules).
For example, five Type 1 100 W or Type 2 (100W) modules using
the standard DC cable supplied with the modules will cause
over-heating to occur within the chassis.
■
Connect a power module to a SuperStack unit whose input DC
power exceeds the output DC power of the power module.
The documentation that accompanies your SuperStack unit will
provide additional information on its compatibility with the
Advanced RPS chassis and power modules.
Power Module Usage
The following lists give, in 3C number order, the SuperStack products
that the different power modules can support. If there is an asterisk
(*) by the product number, that product has the auto-enable feature.
The details are correct at the time of printing this manual, but are
subject to change. If you are in doubt, consult the product user guide
or your supplier for the latest information.