DATOptic ARC-1680 Series - Manual (Page 34)

HARDWARE INSTALLATION
34
Note:
A cable for the global indicator comes with your computer
system. Cables for the individual drive LEDs may come with a
drive cage, or you may need to purchase them.
2.5 LED Cables
There is no SGPIO supported in the most of old version SATA
backplane. The SAS controller also provides two kinds of alterna-
tive LED cable header to support the fault/activity status for those
backplanes. The Global Indicator Connector is used by the server
global indicator LED.
The following electronics schematic is the SAS RAID controller logi-
cal of fault/activity header. The signal for each pin is cathode (-)
side.
The following diagrams and descriptions describe each type of con-
nector.
A: Individual Activity/Fault LED and Global Indicator Con-
nector
Most of the backplane has supported the HDD activity from the
HDD. The SAS RAID controller also provides the fault activity for
fault LED. Connect the cables for the drive fault LEDs between the
backplane of the cage and the respective connector on the SAS
RAID controller.
The following table is the fault LED signal behavior.