Product Overview

The Yokogawa AAT141-S50 S2 is a high-precision analog input module specifically engineered for the CENTUM VP Distributed Control System (DCS). This module specializes in the acquisition of low-level signals from thermocouples (TC) and millivolt (mV) sources. It provides 16 isolated channels, allowing for accurate temperature measurement and voltage monitoring across diverse industrial processes.

Designed for high-density integration within an FIO (Field Interface Orbus) node, the AAT141-S50 S2 converts low-level field signals into digital data for the Field Control Station (FCS). Its isolated architecture is essential for preventing ground loops and mitigating electromagnetic interference, ensuring high signal integrity even in electrically noisy environments such as power plants and chemical processing facilities.

Technical Specifications

• Manufacturer: Yokogawa

• Model Number: AAT141-S50 S2

• Module Type: Thermocouple / mV Input Module

• Number of Channels: 16 channels, isolated

• Input Signals: Thermocouples (Types J, K, E, T, R, S, B, N) and mV (-100 to 150 mV)

• Conversion Speed: 100 ms / 16 channels

• Input Impedance: 10 MΩ (min)

• Accuracy: Variable by range (e.g., ±10 µV for mV; ±0.3°C to ±2.5°C for TC depending on type)

• Isolation Voltage: 1500 V AC between input signals and system; 400 V AC between channels

• Weight: 0.18 kg

• Dimensions: 32.8 mm x 106.3 mm x 130 mm

• Origin: Japan

Key Technical Characteristics

• Broad Sensor Support: Compatible with multiple standard thermocouple types and millivolt ranges, providing high flexibility for various temperature sensing applications.

• Superior Isolation: Features channel-to-channel and channel-to-system isolation to protect the DCS logic from field-side surges and ensure precision in differential measurements.

• Burnout Detection: Includes configurable burnout detection (Up/Down/Off) to alert operators immediately in the event of a sensor failure or broken wire.

• Reference Junction Compensation: Supports high-accuracy cold junction compensation (CJC) when used with appropriate pressure-clamp terminal blocks, ensuring temperature reading stability.

• Energy Efficiency: Optimized for low power consumption within the I/O node while maintaining a 100ms refresh cycle for all 16 channels.

• Durable Construction: Rigorously tested for standard industrial environments, supporting an operating temperature range suitable for control room or cabinet installation.