Areca 24/4 Internal/External Port Pcie 3.0 12 Gb/s SAS/SATA Raid Controller 2Gb Cache - Manual (Page 35)

HARDWARE INSTALLATION
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Figure 2-14, Mini SAS HD SFF-8644 Cable
2.4.4 Mini SAS HD SFF-8644 Cable
The Mini SAS HD SFF-8644 cables are used for connection be-
tween the 12Gb/s SAS controller external connectors and con-
nectors on the external drive boxes or drive expanders (JBOD).
The 12Gb/s SAS controller has Mini SAS HD SFF-8644 external
connector, each of them can support up to four SAS/SATA sig-
nals.
2.5 LED Cables
There is no SGPIO supported in the most of old version SATA
backplane. The 12Gb/s SAS controller also provides two kinds of
alternative 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 12Gb/s SAS RAID con-
troller logical of fault/activity header. The signal for each pin is
cathode (-) side. The following diagrams and descriptions describe
each type of indicator connector.