Zeta Alarm Systems.
Classic 2000 Mk II Operation Manual
Revision 1.0
Part # MAN-Z3K-01
Page 47
3.4.8 Sleep Mode
In the event of a loss of AC Power, the panel automatically transfers to energy conserving “Sleep”
Mode. As with any trouble condition, the yellow Trouble LED will illuminate and the local trouble
sounder will annunciate a trouble condition and the trouble “AC Fail” will be displayed. In the sleep
mode:
A
The backlight will extinguish
B
The Trouble LED will illuminate
C
The trouble contacts transfer* unless programmed for delay to comply with NFPA 72 Central
Station or Remote Station operation (see Section 4 for operation and programming)
*If the system is programmed for NFPA 72 Central Station or NFPA 72 Remote Station oper-
ation, the system must be programmed to delay transfer of trouble contacts.
If the trouble condition is silenced, the trouble silenced LED flashes to designate it is silenced.
If an alarm condition occurs, the display illuminates and enunciates the alarm condition and the
panel returns to normal operation on DC power. When AC Power returns, the green AC LED will
illuminate, the Trouble LED will extinguish, and the panel will return to normal operating condition.
In the event of a delay as above, local annunciation remains the same. Please refer to Section 5 for
information regarding operation and programming of dialer application trouble delays.
3.4.9 Watchdog Circuit Operation
Should the microprocessor fail, the processor automatically attempts to reset the system. Should
the processor be unable to reset, the trouble contacts transfer and the local trouble sounder will
sound a solid tone that cannot be silenced.
Should a microprocessor failure occur, call your authorized representative at once.
3.5 Notification Appliance Circuit (NAC) Operation
The four output circuits may be programmed as Notification Appliance Circuits or 24VDC auxiliary
power outputs. The outputs are programmable for event- or time-based operation and function
similar to output modules on the SLC loop. NACs may be used for Continuous Output or coded
functions - March Time or Temporal, and Two-stage (Sounder output modules may not). NACs may
be silenceable (for horns or bells) or continuous (for strobes).
Notification Appliance Circuits may be programmed at the global system level for certain timing
operations including: Silence Inhibit for up to 5 minutes and Auto Silence from 0, 15, or 30 minutes.
3.6 Addressable Sensor Functions
The addressable smoke and temperature sensors are sensors, not detectors. They convert analog
values read at the sensor head and communicate the values back to the Classic 2000 Mk II con-
trol panel where decisions are made based on the sensor’s readings. Following is a review of the
features and functions relative to the sensors that are available from the control system.
3.6.1 Analog Display
The control panel reads and displays analog information from the sensors. The display is the ana-
log value that relates to percent obscuration per foot for photoelectric and ionization sensors and
degrees for thermal sensors. Analog values are 53-73 for ion sensors, 35-70 for photo sensors,
and 25-115 for thermal sensors. Refer to Appendix I for tables that convert the analog values to UL
