Artesyn AXP1440, Installation And Use Manual, Page: 55 / 156

AXP1440 Shelf Description
AXP1440 Installation and Use (6806800H23T) 53
2.5 Shelf Ground Configuration
The AXP1440 shelf was tested in the default configuration of logic ground and shelf ground
connected and does not connect -48VDC Return with Shelf Ground. The AXP1440 platform has
been tested in the default configuration and complies with safety and regulatory standards.
As a compliant AdvancedTCA shelf, the AXP1440 allows system integrators, at their own
discretion, to remove the mechanism which connects Logic Ground to Shelf Ground and install
the mechanism that connects -48VDC Return to Shelf Ground. If the system integrator
exercises the option of removing the connections from Logic Ground to Shelf Ground and or
adds the connection between -48VDC Return and Shelf Ground, the responsibility for
maintaining compliance to CSA (C/US)/VDE safety requirements and EMI/RFI emission limits
rests entirely with the system integrator and installer.
2.6 Backplane
The shelf backplane supports two hub slots, 12 node slots, and two SAMs, and interfaces for
clocking and metallic test bus. This AdvancedTCA backplane provides the IPMB and I
2
C bus
interface signals from the shelf manager to all AdvancedTCA blades and the other FRUs. The
backplane provides signal routing for fail-over signals between active SAM and standby SAM.
The power connectors for the power entry modules are located on the backplane. The
backplane is not a Field Replaceable Unit (FRU).
2.6.1 Functional Layout
The backplane provides dual star base interface and dual star fabric interface connections at
each blade slot with segmented power (two power segments) provided by the dual Power
Entry Modules (PEMs).