Yes, you can use the Notifier DAA2-5025 as a replacement for the DAA-5025. The DAA2-5025 is backward compatible with previous models, including the DAA-5025. It offers improved functionality and compatibility with newer Notifier fire alarm control panels. Simply swap out the old programmer with the DAA2-5025, and you should be good to go. If you have any further questions or encounter any issues during installation, feel free to ask for assistance.