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The primary power supply unit (PSU1) is located on the right side of the front panel, with PSU2 on the left
side. Status indicators are located just to the left of where the primary power supply unit is located. Each
PSU also has three status LEDs on the right side of the PSU, that indicate the internal status of the unit.
~AC– This LED when lit indicates input voltage between 90 and 264 Volts.
–This LED when lit indicates a fault in the power supply.
OK – This LED when lit indicates that the output from the power supply is +12VDC.
The PSU status indicators are located just to the left of the primary power supply unit, and labeled "PSU1"
and "PSU2". The following status conditions are possible:
2.1.1.3 Fan Status Indicators
The indicator labeled "Fans" is located just to the left of the primary power supply unit, next to PSU 1. The
following fan status conditions are possible:
Table 6 - Fan Status LED Configurations
LED Configuration
2
2.1.2 I
C Connector
The MTS3600 supports an I2C compatible interface on the front panel.This interface is used to program
firmware into the Flash Memory. Firmware can also be programmed in-band over the InfiniBand network.
See Section 3 for more details.
2.1.3 Internal Management
Internal management refers to a switch that has an internal PPC management board. Switches without this
management board can be managed using an external management system. The following interfaces allow
access to the internal management module. These interfaces have no function in externally managed sys-
tems.
Rev 2.0.0
OK – All fans are operating.
Error – One or more fans is not operating. Repair
or replace the fan unit.
Off – The fan unit is not receiving any power.
Check that the fan unit is properly and com-
pletely inserted.
All fans must be operating while the power supply is plugged in. Power must be
removed within one minute of the fans failing, to prevent damage to the switch.
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