NEX7250 Zone 2 Annunciator
35
SEQUENCE TABLE
LINE
PROCESS
CONDITION
PUSHBUTTON
OPERATION
SEQUENCE
STATE
VISUAL
DISPLAY
ALARM
AUDIBLE
DEVICE
REMARKS
1
NORMAL
NORMAL
OFF
SILENT
2
ABNORMAL
ALARM
FAST
FLASHING
AUDIBLE
LOCK-IN
3A
ABNORMAL
ACKNOWLEDGE
ACKNOWLEDGED
ON
SILENT
MAINTAINED
ALARM
3B
NORMAL
ACKNOWLEDGE
TO LINE 4
MOMENTARY
ALARM
4
NORMAL
RINGBACK
SLOW
FLASHING
SILENT
MANUAL
RESET
REQUIRED
5
ABNORMAL
TO LINE 2
RETURN TO
NORMAL
6
NORMAL
RESET
NORMAL
OFF
SILENT
MANUAL
RESET
SEQUENCE FEATURES
1. ACKNOWLEDGE, RESET AND TEST PUSHBUTTONS
2. ALARM AUDIBLE DEVICE (OPTIONAL RINGBACK AUDIBLE DEVICE)
3. LOCK-IN OF MOMENTARY ALARMS UNTIL ACKNOWLEDGED
4. THE AUDIBLE DEVICE IS SILENCED AND FLASHING STOPS WHEN ACKNOWLEDGED
5. RINGBACK VISUAL AND AUDIBLE INDICATIONS WHEN PROCESS CONDITIONS RETURN
TO NORMAL.
6. MANUAL RESET OF RINGBACK INDICATIONS
7. OPERATION TEST
Optional Ringback Audible
As an option the Multifunction “MULT” Relay can be used to provide a separate Ringback audible if
required. When an alarm returns to normal a MULT relay set as a Ringback audible will activate until
the Reset Pushbutton has been pressed. (See Para 5.9 for details)