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)
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
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
