Technical data

Field Replaceable Unit Removal and Replacement
Backplane SEEPROM Assemblies
Chapter 1
46
Backplane SEEPROM Assemblies
The redundant 14-Slot Shelf Backplane SEEPROM Assemblies contain chassis configuration information for
the system, and are power-off, cold-swap FRUs. Backplane SEEPROM Assemblies (also known as Chassis
Data Modules CDM1 and CDM2) are small, pluggable circuit board modules that are mounted on the back
side of the 14-Slot Shelf chassis backplane. They can be accessed after removing the Power Entry Modules
(PEMs) mounted in front of them, as shown in Figure 1-9.
IMPORTANT The redundant SEEPROMs contain identical configuration information for the 14-Slot Shelf
system. When a single Backplane SEEPROM Assembly is replaced with a new blank
SEERPOM Assembly from stock, the Shelf Manager (ShMM) will copy all 14-Slot Shelf system
configuration information from the remaining installed SEEPROM into the new replacement
SEEPROM, thereby maintaining redundancy.
Figure 1-9 Backplane SEEPROM Assemblies (PEM B Removed)