TRICONEX 3481 (TMR Analog Input Module · 16-Channel High-Precision AI) Brand / Series: TRICONEX (a subsidiary of Schneider Electric), dedicated TMR I/O module for Tricon v10/v11 systems Model: 3481 Type: 16-channel Analog Input (AI), Triple Modular Redundancy (TMR), SIL 3, high precision, compatible with v10/v11 systems. ## 1. Basic Parameters Number of Channels: 16 channels with triple redundant acquisition per channel Input Range (Software Programmable): Current: 4–20mA, 0–20mA Voltage: 0–10V, ±10V Resolution / Accuracy: 16-bit; ±0.1%FSR (0–60℃) Update Rate: Approximately 50ms for all channels Input Isolation: Isolated between channels, 1500VAC withstand voltage Operating Temperature: -40℃～+70℃; Storage Temperature: -40℃～+85℃ Power Consumption / Dimensions / Weight: Approx. 6W; Standard Tricon module size; Approx. 0.8kg Certifications: CE, UL, FM, CSA, ATEX, IECEx (SIL 3) ## 2. TMR Redundancy and Diagnosis Triple Modular Architecture: 3 independent sampling circuits per channel, 2-out-of-3 (2oo3) voting logic, single-point fault tolerance. Onboard Diagnosis: Input open circuit / short circuit / over-range detection Self-inspection for power supply, TriBus communication and internal circuits Panel LED Indicators: PASS/FAULT/CH status display Hot Swappable: Supports live replacement without system shutdown. ## 3. Interface and Wiring Connector: 56-pin, matched with dedicated terminal boards (e.g., 9753-240) TriBus: High-speed redundant communication with Tricon main controllers (3501E/3008) Compatible Systems: Exclusively for Tricon v10/v11 (3721 is used for legacy v9 and earlier versions). ## 4. Typical Applications SIS/ESD: Emergency Shutdown, Fire & Gas System (F&G), Burner Management System (BMS) High-Precision Monitoring: Collection of critical parameters such as temperature, pressure, liquid level and flow High-Reliability Scenarios: High-risk industries including oil refining, chemical engineering, LNG and power generation