These are free, open-source, or included:

These libraries contain the reliability values (MTTFd, B10d, DCavg) for Beckhoff’s TwinSAFE components, such as EL6900 logic terminals and EL1904/EL2904 I/O terminals. Beckhoff Automation 💡 Pro-Tips for Using the Library Version Compatibility: If you are using SISTEMA 3.x

(minus one star for limited documentation and dependency on Sistema export files).

All are available via the (online or offline).

Beckhoff SISTEMA Library is a free data package provided by for use with the SISTEMA software tool