TRICONEX 3700 TMR Analog Input Module
Product Overview
The TRICONEX 3700 TMR Analog Input Module provides reliable analog input processing for safety and control systems where uptime and signal accuracy are paramount. Designed as part of a modular control platform, this analog input module supports differential voltage and current signal acquisition with high precision. By employing Triple Modular Redundancy, the 3700 ensures that a single component failure does not compromise module performance or system integrity, making it ideal for mission‑critical deployments in industrial automation.
Key Features
Triple Modular Redundancy (TMR): Three independent processing channels vote on input values, providing fault tolerance and continuous operation even in the presence of hardware anomalies.
High‑Density Differential Inputs: 32 differential, DC‑coupled analog input channels deliver accurate signal measurement while rejecting common‑mode noise inherent in industrial environments.
Advanced Noise Rejection: The differential input design and inherent common‑mode rejection capabilities reduce electrical interference and enhance measurement fidelity.
Continuous Self‑Diagnostics: Real‑time diagnostics on all channels facilitate early detection of potential issues and support proactive maintenance strategies.
Hot‑Swappable Capability: The module can be replaced or serviced without shutting down the entire system, reducing downtime and enabling faster maintenance cycles.
Robust Industrial Design: Engineered to withstand harsh operating conditions, including wide temperature ranges and electrical noise typical of complex industrial settings.

Technical Specifications
Specification Details
Module Name TRICONEX 3700
Module Type Analog Input Module
Architecture Triple Modular Redundancy (TMR)
Input Channels 32 differential, DC‑coupled
Signal Types Voltage and current inputs (differential)
Input Update Rate Approximately 55 ms
Resolution 12‑bit
Common Mode Rejection Up to ‑80 dB (DC‑100 Hz)
Noise Immunity Advanced differential input design
Diagnostics Continuous self‑test monitoring
Serviceability Hot‑swappable module support
Environmental Conditions Designed for industrial ambient temperatures and conditions
Architecture and Design Advantages
The 3700 module leverages Triple Modular Redundancy, a proven fault‑tolerant architecture that runs three independent channels in parallel. Each channel processes the same analog inputs and votes on output values. When one channel deviates beyond permissible thresholds, the remaining channels determine the correct value, ensuring continuous and consistent operation. This process greatly reduces the risk of single‑point failures affecting data integrity or process control.
Its high‑density 32 differential input channels support a broad range of voltage and current analog signals common in process plants, such as 4‑20 mA and 0‑5 VDC ranges. Differential input pairs reject common‑mode noise caused by long cable runs, electrical interference, and ground loops, maintaining measurement accuracy in electrically noisy environments.
Operational Benefits
The TRICONEX 3700 offers multiple operational benefits for industrial control and safety systems:
Enhanced System Uptime: By supporting hot‑swappable operations and continuous diagnostics, the module enables system maintenance without halting operations.
Improved Fault Detection: Continuous self‑test routines and voting logic detect anomalous behavior early and isolate faulty components before they affect system outcomes.
Accurate Signal Processing: Differential inputs and noise rejection ensure reliable signal acquisition even in electrically challenging conditions.
Scalable Integration: The module integrates into modular chassis systems, facilitating expansion and upgrades within a safety or process control architecture.
Industrial Applications
The TRICONEX 3700 module is suitable for safety‑critical and high‑availability industrial automation environments, including but not limited to:
Oil and gas process control systems requiring high‑precision analog monitoring
Chemical and petrochemical plants with stringent safety and measurement demands
Power generation and distribution systems subject to rigorous uptime requirements
Large industrial facilities where signal integrity and reliability are critical to operations