Areca ARC-1880 Series, Руководство пользователя

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HARDWARE INSTALLATION
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Figure 2-18, Activity/Fault LED serial bus connector connected
between 6Gb/s SAS RAID controller & 4 SATA HDD backplane.
PIN Description PIN Description
1 Power (+5V) 2 GND
3 LCD Module Interrupt 4 Protect Key
5 LCD Module Serial Data 6 Fault/Activity Clock
7 Fault/Activity Serial Data 8 LCD Module Clock
The following picture and table is the serial bus signal name de-
scription for LCD & fault/activity LED.
B: Areca Serial Bus Connector
You can also connect the Areca interface to a proprietary SAS/
SATA backplane enclosure. This can reduce the number of activity
LED and/or fault LED cables. The I
2
C interface can also cascade to
another SAS/SATA backplane enclosure for the additional channel
status display.
Areca serial bus also supports SES (SCSI Enclosure Services)
over I
2
C over internal I
2
C backplane cable. The backplane
cable can connect the I2C signal from Areca controller to the
backplane using IPMI-style I
2
C 3-pin connector. It means you
link I
2
C cable into back plane, and let back plane LED indicate
HardDisk fail status.