4118sis Safety Instrumented System Tricon Controller is a fault-tolerant controller based on TMR structure. The fault-tolerant control system can identify and compensate for faults in control system components, and allow for repair of faulty components while continuing to complete specified tasks without interrupting process control. 41 1 8 means that the Tricon control system can repair system faults without affecting normal production. It has the following characteristics: The high safety of 4118 depends on the self diagnosis and online maintenance of TMR hardware structure, 4118 High Availability - Eliminating Misparking, 4118 High maintenance online replacement of faulty cards without the need for parking and maintenance operations without training. Characteristics of Tricon Triple Structure 1. No single point of failure The 4118sis safety instrument system - Tricon controller adopts isolation technology: the three E circuits inside each channel are independent; Three action main processor; Each component box is equipped with dual redundant power supplies (redundant power supplies with evenly distributed loads); Within the 1/0 component, there are no shared components: the channels are completely isolated (which can avoid problems caused by grounding of on-site instruments); Isolation between the system and the site (to avoid the entire system failure caused by strong electrical breakdown of a single module).