American Fibertek Net I/O N-664 - Manual (Page 33)

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Action selects if the target aux output is to be set ON or OFF in response to the local
alarm condition.
Duration sets how long to set the target output for. If duration is set, the N-664 will set
the target aux contact out to the selected status (ON or OFF) for the chosen duration,
and then will set the target to the opposite setting. Thus, if an alarm is set to trigger a
certain aux ON for 5 seconds, the N-664 will when that alarm is triggered contact the
target unit, set the indicated aux to ON, wait five seconds, and then set the indicated aux
to OFF.
Selecting “Follow” for the duration will cause the N-664 to make the targeted aux contact
out follow the state of the alarm input. If the action selected is ON, the target will be
turned ON whenever the local alarm goes ON, and OFF when the local alarm goes OFF.
Selecting an action of OFF will invert the behavior, causing the targeted aux to go OFF
when the local alarm is triggered and ON when it is not.
Selecting “Indefinitely” for the duration will simply cause the N-664 to set the target aux
contact ON or OFF once and leave it so set.
Timing of actions on remote units
Actions to set aux contact outputs on the local unit will be acted on immediately. Actions
to set aux contact outputs on other units on the network may be delayed up to a few
seconds according to network conditions.
The N-664 stores actions to be taken in a queue. Each action is attempted in turn, and if
an action is unable to be completed (unable to reach target address or target device did
not acknowledge the command) it is pushed back on the queue and re-attempted after 5
seconds. After 15 failed attempts an action will be abandoned.
The N-664 is capable of attempting 6 remote actions simultaneously, so a long wait for a
target to respond will not prevent other actions from being attempted.
When a action is taken to set a target aux out for a specific time duration, the beginning
of that duration will be from when the N-664 first succeeded in contacting the target unit,
not from when the alarm was triggered. Thus if a N-664 is set to set a specific aux
contact out ON for 5 seconds when an alarm input is triggered, and it takes 3 seconds to
initially contact the target, the N-664 will turn the target OFF 5 seconds after turning it
ON and therefore 8 seconds after the alarm.