User guide

Chassis and Power Supplies Monitoring Chassis Power
OmniSwitch 7700/7800 Hardware Users Guide April 2005 page 2-17
Monitoring Chassis Power
Adding Network Interface (NI) modules and removing power supplies significantly affects the overall
power budget for the switch. Therefore, before adding a module or removing a power supply, you must
first verify that the current chassis power supports the change.
Refer to the sections below for important information on monitoring the current chassis power.
Checking Chassis Power Before Adding a Module
Depending on the module type, adding a single module can add up to 88 watts to the existing chassis
power requirements. The table below shows the requirements for CMM and NI modules currently
supported on OS7700 and OS7800 switches:
Note. Technical specifications for NI modules are provided in Chapter 5, “Network Interface (NI)
Modules.”
As soon as a module is inserted, and the module’s connectors make contact with the chassis backplane, the
power requirements take effect. If there is not adequate power, the incoming module will not power on.
Additional power errors may also occur, which can interrupt data flow on the switch. Therefore, it is
important to manually check the current chassis power before adding a module.
For examples, showing effective ways to check the current chassis power, refer to the examples beginning
on page 2-18.
Module Type Power Required, in Watts
OS7800-CMM 88
OS7700-CMM 44
OS7-ENI-C24 44
OS7-ENI-FM12 40
OS7-ENI-P24 44
OS7-GNI-U2 47
OS7-GNI-U12 48
OS7-GNI-C12 53