Kingfisher Plus+ Hardware Manual
Block-diagram of the IO-3 module is shown on the figure below.
IO-3 Block Diagram
14.2.2 IO-3 Module LEDs
LED State Description
OK
OFF Module fault (no power)
ON Normal
FU
OFF Fuse OK
ON Fuse fail
A1-A4 - Not used
B1 - Not used
C1-C4
OFF Digital input OFF
ON Digital input ON
D1-D4
OFF Digital output OFF (open)
ON Digital output ON (closed)
Hardware Manual Version 7.16
http://www.servelec-semaphore.com/
Page 204