Router Board; Power Entry Module - Silicon Graphics Origin 3900 User Manual

Router Board

Power Entry Module

007-4653-001
The router board of the Cx-brick contains the following components:
• Router ASIC (same ASIC as used in the R-brick) that makes up the NUMAlink 3
interconnect. The NUMAlink 3 interconnect routes messages between the compute
nodes in the system.
• L1 controller that monitors and manages your Cx-brick, and generates status and
error messages that appear on the liquid crystal display (LCD) located on the
Cx-brick front panel (see Figure 3-3 on page 59).
• Four NUMAlink 3 connectors that connect to router boards in other Cx-bricks or to
R-bricks.
• Two internal XIO connectors. Each internal XIO connector connects to a separate
XIO jumper board that has two external XIO connectors. The two XIO jumper
boards provide a total of four external XIO connectors for the Cx-brick.
• Four sets of MegArray connectors (one set for each IP53 node board). Each set of
connectors consists of one XIO connector and one NUMAlink 3 connector.
• One 48V-to-2.5V converter for the router ASIC.
The Cx-brick contains a power entry module (also known as the inlet board) that receives
48 VDC power from the power bay and converts it to 12 VDC (for the node boards). The
power entry module, which controls fan speed, also contains the following items:
• Four sets of 48V-to-12V converters (one set for each IP53 node board).
• Power switch to power on and power off the Cx-brick.
• Power connector to connect the Cx-brick to the power bay.
• Console serial port (DB-9 connector) for the system console connection.
• L1 port (USB connector) for the L1-to-L2 controller connection.
• Connector that connects the power entry module to the L1 display.
• Eight power LEDs (described in "External Components" on page 58).
Overview
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