System 800xA’s S800 I/O is a distributed, highly modulated and flexible I/O system, providing easy installation of I/O modules and process cabling. S800 I/O modules and termination units can be mounted and combined in many different configurations to fit space requirements or meet any application.

A comprehensive assortment of I/O modules and accessories are available for safety critical and non-critical use. Within the S800 I/O family, there are SIL3 compliant modules that can be used for safety critical applications.

The High Integrity I/O is certified for IEC 61508-SIL3, DIN V 19250/DIN V VDE 0801-AK6 and EN954-1 Category 4. The High Integrity I/O has to be used together with a certified controller to comply with the standards. There are three modules that belong to the High Integrity I/O family that are certified for these standards, AI880/AI880A, DI880 and DO880.

The modules are supported by the AC 800M controllers PM857, PM 863 and PM867 together with an SM812 for SIL3 and have to use the optical ModuleBus modem TB840 when adding optical clusters. 

For more information about the Select I/O High Integrity family visit this webpage.