UNS0122A-P
Emerson UNS0122A-P Safety Communication Module (DeltaV SIS Safety Instrumented System Gateway)
Product Description
The UNS0122A-P is a critical safety communication module designed for Emerson’s DeltaV SIS (Safety Instrumented System), serving as a secure gateway between the safety controller and non-safety systems (e.g., DCS, HMI, asset management tools). Its primary function is to facilitate bidirectional data exchange while maintaining the integrity of safety-related information, ensuring compliance with international safety standards (IEC 61508 SIL 3, IEC 61511) in high-risk industries such as oil refineries, chemical plants, and LNG terminals—where a communication failure could mask hazardous conditions (e.g., a pressure spike in a reactor vessel).
Operating as a “safety barrier,” the module enforces strict data separation between safety and non-safety networks, preventing unauthorized access or interference with safety logic. It supports encrypted communication (AES-256) for both read and write operations, ensuring that critical safety parameters (e.g., emergency shutdown setpoints) cannot be altered by non-authorized systems. For example, in a refinery’s distillation unit, it allows the DeltaV DCS to monito