Rear Components - Silicon Graphics Origin 300 User Manual

A: Technical Specifications

Rear Components

132
The AC- and DC-powered NUMAlink modules have the following rear-panel items
(refer to Figure A-10 and Figure A-11):
• PWR (power) connector:
• Attaches the AC-powered NUMAlink module to the PDU or power strip via a
power cable.
• Attaches the DC-powered NUMAlink module to the power bay module via a
DC power cable.
• L1 port connector connects the internal USB hub of the NUMAlink module to the
L2 controller. The internal USB hub receives the USB signals from the L2 controller
via this port and distributes these USB signals to the L1 controllers of the attached
Origin 300 base modules and PCI expansion modules.
• LINKS R to R connectors (also referred to as ports 1, 6, 7, and 8, or A, F, G, and H)
connect Origin 300 base modules to the NUMAlink module.
• LINKS R to R and C to R connectors (also referred to as ports 2, 3, 4, and 5, or B, C,
D, and E) connect Origin 300 base modules and/or PCI expansion modules to the
NUMAlink module.
Besides NUMAlink signals, ports 2, 3, 4, and 5 transfer USB signals between the
USB hub of the NUMAlink module and the L2 controller.
• LINK connector LEDs. Each NUMAlink connector has two LEDs:
– The green LED illuminates to indicate that a cable is connected properly
between the NUMAlink module and another module.
– The yellow LED illuminates to indicate that the L1 controller detected the
"Remote Power OK" signal from the module on the other end of the cable.
The DC-powered NUMAlink module also contains the following rear-panel items:
• Power switch powers on the L1 controller when moved to the
to the position powers off the L1 controller.
0
• 12-Vdc LED illuminates green when the power switch is in the On position and the
power bay supplies 12 Vdc to the module.
• 48-Vdc LED illuminates green when the power bay supplies 48 Vdc to the module
at the request of the L1 controller.
position; moving it
1
007-4498-002