Esm Board User Controls - IBM TotalStorage 200 Installation And User Manual

Power on/off switch
Fault LED (amber)
DC power LED (green)
AC power LED (green)
Handles

ESM board user controls

Two environmental services monitor (ESM) boards are accessible from the back of
the storage unit. These components contain several user controls, indicators, and
connectors.
Termination-
LVD/SE
power
LED (green)
LED (green)
ESM board
Push pin
SCSI reset
LED (green)
ESM board
Fault LED (amber)
SCSI reset LED
Push pins
Termination-power LED (green)
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5194 Network Attached Storage Model EXU Installation and User's Guide
Use this switch to turn the power supply on and off.
When completely lit, this amber fault LED indicates a power supply failure
or that a redundant power supply is not on. This LED also flashes when the
built-in fan fails.
This green LED is lit when the storage unit is turned on and is supplying
both 5 V and 12 V dc power.
This green LED is lit when the storage unit is receiving ac power.
The two handles are used for installing and removing the power supply.
Termination-
SCSI Bus
power
connector 2
LED (green)
Push pin
Activity
LED (green)
SCSI reset
Fault
LED (green)
LED (amber)
The environmental services monitor (ESM) boards contain the SCSI
controls, LEDs, and connectors.
When lit, this amber LED indicates an ESM board failure.
When lit, this green LED indicates a SCSI bus reset.
Each ESM board has an orange push pin at the lower left of the board. Use
the orange push pin and lever to remove and insert the ESM board.
When lit, this green LED indicates that termination power is present. When
a termination-power LED is lit, it indicates that the other end of the cable is
connected to a powered-on controller. Each external bus has a separate
termination-power LED.
SCSI Bus
connector 1
LVD/SE
LED (green)
Activity
LED (green)
Fault
LED (amber)
ESM board