Power Management And System Cooling - Allied Telesis SwitchBlade x3100 Series Manual

Power Management

1.15 Power Management and System Cooling

1.15.1 Power Management
1.15.1.1 Introduction
The power and system cooling for the SBx3112 involves the following components:
SBxFAN
•
POE Power Supply Units (PSU)
•
System Power Supply Units (PSU)
•
The next two sections describe their functions and how the interact.
1.15.1.2 Power Supply Unit (PSU)
There are four removable system Power Supply Units (PSU) labeled on the front of each shelf. They are in
groups of two, with each group providing the following
System - These are labeled as "SBxPWR-SYS/AC". Each system PSU has AC power input, with output volt-
•
age of 12VDC and output power of 1200 W.
Power over Ethernet (PoE) - These are labeled as "SBxPWR-POE/AC". Each POE PSU has AC power input,
•
with output voltage of 56VDC and output power of 1200 W.
Model numbers for the PSUs follow the numbering scheme AT-SBx3161-nn AT-SBx3165-nn, with the nn desig-
nating a country or region. Refer to the SwitchBlade x3112 Installation Guide for specific model numbers.
The POE PSUs reside in power slots A and B, and the system PSUs reside in power slots C and D. The slots are
electronically keyed to prevent a PSU from being damaged if accidentally inserted in the wrong slot; the PSU will
only draw power and light LEDs in the correct slot. If an incompatible PSU is inserted into a PSU slot, the sys-
tem will raise an alarm, CARD MISMATCH. (Refer to the Log Manual.)
1.15.1.3 Power Supply Functions
All 4 power supplies are monitored and controlled for voltage, current, and temperature levels, and controlling
the on/off state. All are hot swappable.
The system power supplies operate in a load sharing mode, but the system can run with a single system power
supply. If both system PSUs have been configured in the system but one of them is physically not present, then
the system will report a power feed failure alarm. However, if only one PSU is configured in the database the
system does not report a power feed failure alarm. Thus the customer can run normally on one system PSU if
they desire, but dual PSUs are recommended for increased fault tolerance.
Software Reference for SwitchBlade x3100 Series Switches (Setting Up the Switch)
Introduction
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