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The IB1005 works with a standard LB1001 board and controls the LEDs through 8 general-purpose I/O (GPIO) lines of the EM1000 module (installed on the NB10x0 network board). To turn the LED on, set the corresponding line LOW. All LED control lines have to be configured as outputs.
For all LED control lines:
HIGH (or input*) - LED off
LOW - LED on
*GPIO line configured as input (default state)