TRICONEX 2351 analog input module

The TRICONEX 2351 typically refers to the TRICONEX AI2351, a high-reliability analog input module and a key component of the TRICONEX fault-tolerant control system. Below is its comprehensive detailed information:

1. Product Overview

As a product of the TRICONEX brand under Invensys (now part of Honeywell), the TRICONEX AI2351 is specifically designed for industrial applications requiring high safety and availability. Its primary function is to receive analog signals (e.g., temperature, pressure, flow) from on-site instruments, convert these signals into digital format, and transmit them to the CPU of the TRICONEX controller for processing and decision-making. It serves as a critical "analog signal acquisition link" in safety-critical and process control systems, ensuring accurate and reliable data input for the entire control loop.

2. Product Parameters

Number of Input Channels: 16 channels (typical value).
Resolution: 16 bits (typical value), ensuring high-precision capture of small signal variations from field sensors.
Accuracy: ±0.1% of full scale (FS), meeting the precision requirements of critical process parameter monitoring (e.g., reactor pressure, turbine temperature).
Sampling Rate: Configurable, typically in the millisecond (ms) range, enabling real-time response to dynamic changes in field signals.
Relative Humidity: 5% to 95% (non-condensing), adapting to humid industrial environments such as coastal refineries or chemical plants.
Power Requirement: +5 VDC (typical value, supplied by the system backplane), ensuring compatibility with TRICONEX standard power architectures.
Power Consumption: <3 W (typical value), minimizing energy consumption in control cabinets.
Backplane Interface: TRICONEX TMR Bus (Triple Modular Redundancy Bus), enabling synchronized data transmission with TRICONEX redundant controllers and ensuring fault-tolerant operation.

3. Advantages & Features

High Reliability: Adopts Triple Modular Redundancy (TMR) technology—critical internal components are triple-redundant. A single component failure will not affect the normal operation of the module, significantly reducing unplanned downtime.
High Safety: Engineered for safety-critical applications, it complies with relevant safety standards such as IEC 61508 and can provide safety assurance at the SIL 2 or SIL 3 level, meeting the safety requirements of industries like oil & gas and chemicals.
Strong Anti-Interference Capability: Designed to address the complexity of industrial environments, it integrates multi-stage EMI (Electromagnetic Interference) filters and galvanic isolation, effectively resisting noise from motors, inverters, and power grids, and maintaining signal integrity.
Accurate Signal Acquisition: Equipped with high-resolution (16-bit) and high-accuracy (±0.1% FS) analog input channels, it can accurately capture weak signals from field instruments (e.g., 4–20mA current signals from pressure transmitters) without significant distortion.
Easy Integration: Seamlessly integrates with other TRICONEX modules (e.g., digital I/O modules, communication modules) and controllers. It supports hot swapping, allowing on-line replacement without shutting down the system—simplifying maintenance and system expansion.