Areca ARC-1110 User Manual page 42

HARDWARE INSTALLATION
Step 6 Install the LED cable (optional)
ARC-1XXX Series Fault/Activity Header Intelligent Electronics
Schematic
The intelligent LED controller outputs a low-level pulse to deter-
mine if status LEDs are attached to pin sets 1 and 2. This allows
automatic controller configuration of the LED output. If the logical
level is different between the fist 2 sets of the HDD LED header
(LED attached to Set 1 but not Set 2), the controller will assign the
first HDD LED header as the global indicator connector. Otherwise,
each LED output will show only individual drive status.
The SATA RAID controller provides three kinds of LED status con-
nectors.
A: Global indicator connector, which lights when any drive is ac-
tive.
B: Individual LED indicator connector, for each drive channel.
C: I C connector, for SATA proprietary backplane enclosure.
2
D: SGPIO connector for SAS Backplane enclosure
The following diagrams and description describes each type of con-
nector.
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