Secutron Inc. 38
5.9 NAC operation
See also 6.3.2 NAC Sounding Rate Programming on page 44, and 6.3.4 Signal Silence Inhibit
Timer and Walk Test Programming on page 46 for more information.
5.9.1 Class ‘B’ operation selections:
• Steady (default) – On alarm the NAC will turn on steady. It will turn off on either a
manual or automatic signal silence.
• Temporal 3 – On alarm the NAC will turn on with the temporal 3 pattern and turn off on
either a manual or automatic signal silence.
• NAC2 Strobe – On alarm NAC2 will turn on steady. It will not turn off on a manual or
automatic signal silence. NAC2 set in this mode will only turn off on system reset if all
zone fire alarms are restored. Only NAC2 can be set in this mode.
5.9.2 Class ‘A’ operation selections
If the panel NACs are set for class ‘A’ operation then there is only one NAC. In this
configuration the NAC output can only be set for steady or temporal using the NAC1
programming options For class ‘A’, the NAC2 Strobe option is not available.
5.10 Relay Function
5.10.1 Alarm Relay
The panel activates the alarm relay upon any (non-supervisory) zone alarm. The panel
deactivates the alarm relay upon a successful system reset.
5.10.2 Trouble Relay
The panel deactivates the trouble relay upon any system trouble. The panel activates the
trouble relay upon the restoral of all system troubles.
5.10.3 Supervisory Relay (available with the MR-2605-R3 Relay Expander only)
The panel activates the supervisory relay upon any supervisory zone alarm. The panel
deactivates the supervisory relay upon a successful system reset.
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