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24
ISA R – Ringback
PROCESS
SEQUENCE
VISUAL
AUDIBLE
ABNORMAL
OR NORMAL
ALARM
FAST FLASH
AUDIBLE
SEQUENCE
PROCESS
OFF
VISUAL
AUDIBLE
SILENT
NORMAL
NORMAL
AUDIBLE
VISUAL
SEQUENCE
PROCESS
ABNORMAL
SILENT
ON
ACKNOW
NORMAL
PROCESS
VISUAL
AUDIBLE
SEQUENCE
SLOW FLASH
PULSING
RINGBACK
ACK WHILE ABNORMAL
RETURN TO NORMAL
TO ABNORMAL
RESET
RETURN
TO NORMAL
ACKNOW
WHILE NORMAL
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 the flashing stops when acknowledged
5. Ringback visual ad audible indications when the process condition returns to
normal
6. Manual reset of Ringback indications
7. Operational test