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II. System Components
Hot-Swap Tray Connector Board
The connector board is mounted on the hot-swap tray to interface with the
SCSI backplane in the chassis. The connector board combines all the signal
and power into one docking connector for a simple hot-swap unit.
KEY
Hot-Swap Tray
Docking Connector
Hot-swap tray connector board parts
Hot-Swap Tray Rear Connections
KEY: These 2 pins connect to the keylock on the tray's front panel to turn on
and off the drive's power.
PLED: These 2 pins connect to the power LED on the tray's front panel to
show when the connector board receives power.
SCSI_ID: These 8 pins connect to the hard disk drive's SCSI address pins
to set the SCSI ID number of the hard disk drive.
SLED & ALED: These two wires are connected as illustrated below.
from tray's front panel 3 pin
activity LED (SLED wire)
KEY PLED
Hot-swap tray rear connections (Seagate HD)
20
SLED
(not used)
PLED
Wide SCSI
Connector
Hard Disk Drive
Power Connector
SCSI_ID
Power
AP7500 Hardware Reference Guide
ALED_IN
SCSI_ID
(not used)
Connector Bridge for LED
from hard disk drive's 2 pin
activity LED (ALED wire)
Green
Black
Red
SLED
(wire)
Bridge
Red
Black
ALED
(wire)
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