Product Overview
The Emerson 800XP-SM32 in Standard Orientation is a high-integrity, triple modular redundant (TMR) I/O and logic solver module that forms a core component of the DeltaV SIS (Safety Instrumented System) platform. This specialized module is engineered for the most demanding safety applications in process industries, where failure is not an option. The primary function of the 800XP-SM32 Standard Orientation module is to execute safety logic and interface with field devices to implement Safety Instrumented Functions (SIFs) that protect personnel, equipment, and the environment. It achieves this through a sophisticated TMR architecture, where three independent, synchronized processor channels simultaneously execute the same application logic and vote on the outputs. This design ensures that a single fault in any one channel does not cause a dangerous failure of the safety function, providing both high availability (to avoid nuisance trips) and high safety integrity.As part of the Emerson DeltaV SIS family, the 800XP-SM32 is designed for seamless integration with the DeltaV distributed control system (DCS) while maintaining the physical and logical separation required for safety systems. Its “Standard Orientation” designation typically refers to its standard mounting and connection configuration within the 800XP series chassis, as opposed to a “Reverse Orientation” variant. The module’s value lies in its certified performance for Safety Integrity Level (SIL) 3 applications as per IEC 61508 and IEC 61511 standards. It provides 32 digital I/O points (configurable as inputs or outputs) in a TMR configuration, meaning each field signal is read or controlled by three independent circuits. The module handles logic solving internally, capable of implementing complex interlock, voting, and shutdown logic without relying on an external controller. The Emerson 800XP-SM32 Standard Orientation module is a critical element for implementing reliable emergency shutdown (ESD), fire and gas (F&G), and burner management systems (BMS) in hazardous processes.
Technical Specifications
| Parameter Name | Parameter Value |
|---|---|
| Product Model | 800XP-SM32 (Standard Orientation) |
| Manufacturer | Emerson Process Management |
| Product Type | Triple Modular Redundant (TMR) Safety Logic Solver & I/O Module |
| Safety Certification | SIL 3 (IEC 61508 / IEC 61511) |
| Architecture | 1oo2D (One-out-of-Two with Diagnostics) or TMR, user-selectable per point |
| I/O Type | 32 points, Digital, Configurable as Input or Output (Sink or Source) |
| I/O Isolation | Grouped (points are isolated in groups, e.g., 8 points per common) |
| On-board Logic Solver | Yes, capable of executing safety application logic |
| Diagnostic Coverage | High (>99%), with extensive online diagnostics |
| Communication | Integral to the DeltaV SIS bus for communication with other SIS modules and the DeltaV DCS |
| MTTFd (Mean Time to Dangerous Failure) | Very High (>100 years typical) |
| Operating Temperature | -40°C to 70°C (-40°F to 158°F) |
| Housing/Chassis | Modules into the Emerson 800XP Series Chassis |
| Power Supply | Powered from the 800XP chassis (typically 24V DC) |
| Status Indication | Comprehensive LEDs for channel status, I/O status, and module health |
Main Features and Advantages
The defining feature of the Emerson 800XP-SM32 (Standard Orientation) is its fault-tolerant Triple Modular Redundant (TMR) design. This architecture provides an exceptional level of safety and availability. The three isolated channels operate in lockstep, with a hardware voter comparing their outputs. If one channel disagrees due to a fault, it is automatically out-voted by the other two, and the system continues to operate correctly while diagnosing the faulty channel. This allows for online maintenance and repair without taking the safety system offline. The module’s high diagnostic coverage continuously tests the processors, memory, and I/O circuits, detecting over 99% of dangerous failures. This diagnostic capability is crucial for achieving and maintaining the SIL 3 rating, as it ensures failures are detected before they can compromise the safety function.
