Power Board; L1 Controller; Power Supply (Ac-Powered Numalink Module Only) - Silicon Graphics Origin 300 User Manual

A: Technical Specifications

Power Board

L1 Controller

Power Supply (AC-powered NUMAlink Module Only)

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The power board connects to the router PCB via the power connector. It contains a VRM
and voltage regulators that convert the incoming 48 Vdc to voltage levels that the
components within the module require. The power board also contains a serial ID
EEPROM and the L1 controller logic.
The L1 controller monitors and controls the following environments: operating
temperature, voltage margins, and system LEDs.
The L1 controller also reads component information from serial ID EEPROMs, provides
a console connection, and interfaces with its own 2-line x 12-character LCD. The
NUMAlink module L1 controller connects to the L2 controller via its internal USB hub
and 4-pin USB port connector.
The L1 controller consists of the display, logic components, and a display cable. The
display is located at the front of the module. The logic components are located on the
power board. The cable connects the display to the logic components.
The AC-powered NUMAlink module uses a nonredundant switching power supply that
inputs 90 to 264 Vac from a PDU or power strip and outputs 48 Vdc (120 W) and 12 Vdc
standby. The power supply delivers this voltage to the power board via a cable harness.
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