: Version 20 is a "bridge" version. Note that while newer Studio 5000 versions (v21+) can sometimes be bundled, RSLogix 5000 versions (v20 and lower) must typically be installed one by one as they do not support the modern "Multi-Version" installer.
To download RSLogix 5000 version 20.04, you can visit the Rockwell Automation website. You will need to create an account or log in to your existing account to access the software. Rslogix 5000 Version 20.04 Download