Tank and Terminal Management

Tank and Terminal Management

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Logic solver

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Actuation

IEC 61511 SIS loop

Safety logic within safety PLC

Signal from solver 4-20mA or discrete

Level signal to solver 4-20mA or discrete

Inventory measurement 2YHUÀOO SUHYHQWLRQ

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Safety High High alarm (HH) to inventory systems

Level & temperature signal to inventory interface Fieldbus

Inventory system monitors all alarms for monitoring ONLY

Inventory calculation volume & mass

IEC 61511 SIS loop

Inventory interface

Inventory devices

Visualization

Safety solutions should consider: ‡ Independent & diverse measurement between SULPDU\ OHYHO DQG RYHUÀOO PRQLWRULQJ ‡ Independent of primary or secondary level ‡ Separate level and safety signals are recommended ‡ Proof test and record regularly