Moore Industries International Inc. has released a technical white paper exploring the possibilities available to designers of safety instrumented systems (SIS) using logic solvers as part of a tank overfill protection system.
The white paper, “Logic Solver for Tank Overfill Protection,” provides examples of tank overfill protection system topographies and associated safety integrity level (SIL) calculations.
The white paper guides safety engineers through the steps needed to determine the right logic solver for their needs. While many people assume that a logic solver for a tank overfill protection system must be a safety PLC, in many cases a discrete logic device in the safety loop is sufficient. This avoids the complications and expense associated with a complex programmable solution.
The white paper shows the methodology and calculations for determining applicable logic solvers in SIL 1 and SIL 2 environments.