Mains Fail Delay - Eaton i-on series Engineering Manual

i-on Range
30, 60, 120 minutes
The keypad gives the alert tone for the selected time. The status LEDs on the
Navigation key stay on for the selected time. The alert tone stops if a user enters a
valid access code.
No Alert Tones
The keypad gives no alert tone. (The red LEDs around the navigation key glow to
show that there is an alert.)
Note: The control unit will not show keypad alerts while the system is set.

Mains Fail Delay

This option controls the length of time that the control unit waits after experiencing a mains
supply failure until reporting Mains Fail to the ARC. The values available are 0 to 60
minutes.
When the mains supply fails the control unit lights the red LEDs around the navigation key
within a few seconds of the failure, activates any output programmed as General Fault and
logs the mains fail event (in the mandatory log).
The control unit does not report mains interruptions of less than 9 seconds to the ARC. If
mains is restored within that time the control unit turns the red LEDs around the navigation
key off, deactivates the General Fault outputs and logs the mains restore.
If a mains interruption lasts for longer than 9 seconds then the subsequent additional
actions depend on the value in Mains Fail Delay.
When the value is set to 0 minutes then ten seconds after the mains fail the control unit
starts an alert tone at the keypads and communicates a mains fail signal to the ARC
(provided a communicator is fitted). At the same time the control unit activates any outputs
programmed as AC Fail.
When Mains Fail Delay is set to one or more minutes than ten seconds after the mains fail
the control unit starts the Mains Fail Delay timer.
If mains power is restored before the end of the Mains Fail Delay then the control unit
switches off the red LEDs around the navigation key, deactivates any General Fault
outputs and logs the mains restore. The control unit does not send any report to the ARC.
If the mains fail condition is still present at the end of the chosen mains fail delay the
control unit starts an alert tone at the keypads and communicates a mains fail signal to the
ARC (provided a communicator is fitted). At the same time the control unit activates any
outputs (including plug-by outputs) programmed as AC Fail.
A user can silence the alert by pressing the navigation key and keying in a valid access
code. The keypad displays details of the alert. The General Fault and AC Fault outputs
remain active.
Once mains power is restored the control unit deactivates any AC Fail outputs and logs
the mains restore. A user can reset the alert and deactivate any General Fault outputs by
pressing the navigation key on a keypad and entering their access code again.
External PSUs
If the system has an EXP-PSU fitted (
to a zone with type "External PSU AC Fail" in order to report mains fail, then the control
unit treats a mains fail at the external PSU in the same way as a mains failure at the
control unit. There is however a small difference in how the failure is reported to the ARC.
If the control unit and external PSU both experience individual mains failures, but starting
at different times, then as long as those mains failures overlap and together last for more
30 50 160), or if an external PSU is connected
Installer Menu Options
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