Product Core Brief

• Model: 3411S2
• Brand: Triconex
• Series: Tricon / SDO 3411
• Core Function: Provides fault-tolerant 24 Vdc digital outputs to field devices
• Product Type: Digital Output Module
• Key Specs: TMR architecture | 24 Vdc | SIL 3 capable
• Condition: New Original (New Surplus)

Key Technical Specifications

• Architecture: Triple Modular Redundant (TMR)
• Output voltage: 24 Vdc
• Output type: Digital (discrete)
• Safety integrity: Suitable for SIL 3 applications per IEC 61508 / 61511
• Isolation: High channel-to-system isolation (typically 1500–2500 V range)
• Power supply: From Tricon chassis backplane (redundant low-voltage DC)
• Operating temperature: Typically 0 to 60 °C (non-condensing)
• Form factor: Standard Tricon I/O module for main or expansion chassis
• Field interface: Requires matching Field Termination Assembly (FTA)
• Diagnostics: Comprehensive on-board self-test and status reporting
• Hot-replaceable: Yes, in properly configured TMR systems

Product Introduction

Triconex 3411S2 is a TMR digital output module in the Tricon safety system family. It drives 24 Vdc field devices such as solenoids, relays and actuators under Triple Modular Redundancy.

Each output channel is processed through three independent paths with hardware voting, meeting SIL 3 requirements for critical safety instrumented functions. The module installs in a Tricon chassis, interfaces to the field via dedicated FTAs, and supports online replacement without interrupting the safety logic solver.