DirectOut Technologies EXBOX.BLDS User Manual page 41

Watchdog
A state change on GPI 1 (or 2) is needed to maintain
the adjusted priority setting to the prioritized input.
The minimum alternation frequency of the GPI state
amounts to less than 0.5 Hz (i.e. every two seconds).
• GPI 1 is used for watchdog on input 1.
• GPI 2 is used for watchdog on input 2.
Active watchdog is indicated by blinking codes of the
LEDs in all three sections.
Example:
Input Priority set to input 1 and watchdog active on
GPI 1.
Watchdog condition is true.
Input Priority set to input 1 and watchdog active on
GPI 1.
Watchdog condition is false.
EXBOX.BLDS Manual - Version 1.3
CHAPTER 4: Operation
page 41 of 64