The Delta DVP28SA211R is a model of programmable logic controller (PLC) manufactured by Delta Electronics. 

The DVP series PLCs are designed for various industrial automation applications and offer a range of features and capabilities. The DVP28SA211R is a compact PLC with 28 digital inputs and 20 relay outputs. It supports multiple communication protocols such as RS-232, RS-485, and Ethernet, allowing for easy integration into different automation systems.

The DVP28SA211R PLC supports ladder logic programming and can be programmed using Delta's programming software called WPLSoft. The software provides a user-friendly interface and a wide range of programming functions and instructions to develop control logic for your applications.

With its robust design and reliable performance, the DVP28SA211R PLC is suitable for various industrial automation projects, including machine control, process control, and monitoring applications.

Please note that in the fast-paced technology industry, product models and specifications may change over time, so it's always recommended to refer to the latest documentation or contact the manufacturer for the most up-to-date.