Areca ARC-1880 Series User Manual page 37

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