HP D5970A - NetServer - LCII Service & Reference Manual page 82

Rear View
Fan
Unit
Power Cord Connectors
Environmental Services
Monitoring (ESM) Module
Power Supplies
Fan Units
Hot Swap Disk Drive Front View
Power\Fault
LED
76
ESM
Power
Unit
Power Cord
Connectors
Provides a connection for the AC power cord.
This board provides three functions:
Status reporting for the subsystem through the SCSI interface
SCSI connection between the subsystem and the host
Electrical isolation of internal and external buses.
There are two hot-swap power supply units accessible from the rear of
the system. Each unit is portable and hot-swappable containing one 250
watt, redundant switching, regulated power supply.
There are two fan units accessible from the rear of the system. Each is a
portable, hot-swappable unit.
A
L
Drive Activity LED This LED blinks green to indicate SCSI
activity to and from the associated drive.
Power/Fault LED The LED lights above each drive indicate that
drive' s status. If the LED is green, the drive is operating correctly.
Power
Unit
Fan
Unit