Apc SGI 15000 RAID User Manual Page 112

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98 007-5510-002
5.3.2 Input/Output (I/O) Module
The drive enclosure storage subsystem includes an enclosure with rear facing bays which house two (2)
I/O modules (Figure 5–5). Processors housed on the I/O modules provide enclosure management and
interface to devices on the Backplane, PCM, and Display Panel in order to monitor internal functions.
The plug-in I/O modules have been designed for integration into a drive enclosure storage subsystem,
providing external SAS cable interfacing with up to 60 SAS or SATA disk drives.
Table 5–1 PCM LEDs
PCM LEDs
Normal Operation LEDs Faults LEDs Enclosure Audible Alarm
GREEN
AC Input
FAILURE
off
Off
GREEN DC Output
FAILURE
off
Off
OFF Fan Fault /
Power Supply
Fault
AMBER
Off
OFF ID BLUE
Off
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