Triconex 8120 是一种三重冗余（TMR）控制器，由艾默生过程控制有限公司开发。它在炼油、化工和其他工业领域中得到广泛应用，主要作用是提高系统的可靠性和安全性。

控制器采用了三重模块化冗余（TMR）技术，即每个功能模块都有三个并行的工作单元，互为冗余。这种设计可以大大提高系统的可靠性，当某个单元发生故障时，其他两个单元仍能继续工作，不会影响整个系统的运行。

控制器还具有多种高级功能。例如，它可以通过拓展机架来增加更多的I/O模块，以满足不同应用的需求。同时，它还支持多种不同的通信协议，可以与各种类型的设备进行通信。

是一种高可靠性、高性能的控制器，适用于各种需要高安全性、高可靠性的工业应用场景。

It is a Triple Redundant (TMR) controller developed by Emerson Process Control Co., Ltd. It is widely used in oil refining, chemical engineering, and other industrial fields, mainly to improve the reliability and safety of the system.

The controller adopts Triple Modular Redundancy (TMR) technology, which means that each functional module has three parallel work units that are redundant to each other. This design can greatly improve the reliability of the system. When one unit fails, the other two units can still work without affecting the operation of the entire system.

The controller also has multiple advanced functions. For example, it can add more I/O modules by expanding the rack to meet the needs of different applications. At the same time, it also supports various communication protocols and can communicate with various types of devices.

It is a highly reliable and high-performance controller suitable for various industrial application scenarios that require high security and reliability.