Emerson AXP640-AC2-110VAC, Installation & Use Manual

Page: 34 / 190

AXP640 Shelf Description
AXP640 Installation and Use (6806800M24E )
34
2.6.2 E-Keying
The AXP640 supports the shelf management infrastructure with a process called E-Keying.
E-Keying replaces the mechanical connector keying method used in earlier backplane designs.
E-Keying prevents damage to blades, prevents misoperation, and verifies fabric compatibility.
E-Keying entries are present as FRU information in the shelf FRU and all blades present in the
shelf. The E-Keying entries describe the Base Interface, Fabric Interface, Update Channel
Interface as implemented by the shelf and blades. E-keying allows blades that support different
PICMG 3 standards to be used in the same shelf.
Figure 2-5 Management Power Distribution
Shelf
Manager
DC PEM
FTM
FTM
DC PEM
48V_B
3.3V_B
Shelf
Manager
48V_A
FTM
3.3V_A
48V_B
48V_A