A new standalone, low-cost safety instrumented system (SIS) has been released from SIS-TECH, called the DIAMOND-SIS automated independent backup (AIB) for process control systems.

The SIS backs-up current process control trip logic and meets the requirements of IEC 61511, and includes an IEC 61508 logic solver that is functionally-independent from the process control system, supplementing existing logic, and meeting all appropriate safety standards, according to the distributor.

DIAMOND-SIS AIB is designed to provide high integrity and process reliability. It is available in single, dual, and triplicated channel configurations with on-line diagnostics, testing, and maintenance capabilities.

The single and dual channel systems are acceptable for SIL 2, and the triplicated channel system is certified by Factory Mutual to SIL 3., meaning that DIAMOND-SIS can meet the fault tolerance and PFavg requirements of any application, says SIS-TECH.