Triconex 3481 / AO3481 Analog Output Module

Description

The Triconex 3481 (AO3481) is an analog output module designed for controlling analog field devices in Tricon safety-critical systems. Operating on a Triple Modular Redundant (TMR) architecture, the 3481 processes output data received over the system I/O bus from Main Processor modules and converts digital values into 4-20 mA analog output current signals. The module incorporates three independent execution channels to ensure fault tolerance and output voting before current delivery to connected final control elements.

Features

• TMR architecture for high reliability in safety-critical control loops
• 4-20 mA current loop output generation
• Onboard diagnostic checking and status reporting via module indicators
• Galvanic isolation between logic side and field control circuitry
• Online hot-swappable installation without process interruption

Applications

• Emergency Shutdown (ESD) systems
• Fire and Gas (F&G) detection and control systems
• Burner Management Systems (BMS)
• Turbomachinery control and protection

Technical Specifications

Installation Guidelines

• Chassis Slots: Insert the module into the designated analog output slot on the primary or expansion chassis backplane.
• Hot Swap Procedure: When replacing an active module, ensure the secondary slot keying matches before inserting the replacement card.
• Wiring: Connect field wiring to the corresponding external termination panel (ETP) screw terminals to prevent mechanical stress on module connectors.