Nac Operation; Relay Function - Secutron MR-2602 Installation Manual

5.9 NAC operation

See also "NAC Temporal/Steady Programming - Section 1 ('NAC1' LED on steady)" on page 25, and "NAC
Auto-silence and Strobe Programming - Section 2 ('NAC2' LED on steady)" on page 25 for more information.
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.
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

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.
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.
Supervisory Relay (available with the MR-2602-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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