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INM MTL SUM5 Rev 7
DRAFT - 09 June 2021 DRAFT - 09 June 2021
30.6 ISA A-1-2 – Automatic Reset – Silence Pushbutton Interlock
Sequence Features
1. Acknowledge, silence and test pushbuttons.
2. Alarm audible device
3. Lock In of momentary alarms until acknowledged
4. Silence pushbutton must be pressed before acknowledge
5. Silence stops the audible alarm only
6. The ashing stops when acknowledged.
7. Automatic reset of acknowledged alarms when the process has returned to normal
8. Operational test
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