Product Overview

The Yokogawa AAT145-S53 S1 is a high-density, isolated temperature and millivolt input module engineered for the CENTUM VP Distributed Control System (DCS). This module is specifically designed to interface with various thermocouple types and low-voltage signal sources, converting sensitive thermal and millivolt data into digital information for process control logic. With 16 independently isolated channels, the AAT145-S53 S1 provides exceptional protection against common-mode noise and ground loops, ensuring high-fidelity signal acquisition in heavy industrial environments where temperature precision is critical for product quality and safety.

Technical Characteristics

The AAT145-S53 S1 is built to meet the rigorous demands of modern process automation through several key engineering features:

Comprehensive Signal IsolationThe module features 16 fully isolated input channels. This galvanic isolation protects the system backplane and neighboring channels from electrical surges and signal interference. By decoupling the field-side signals from the system electronics, the module maintains a high Signal-to-Noise Ratio (SNR) even in areas with significant electromagnetic interference.

Versatile Input Range and Support The hardware supports a wide range of standard thermocouples (such as Type K, J, T, E, R, S, B, and N) and millivolt inputs. It operates within a standard input voltage allowance of ±140 mV for TC measurements and can handle up to ±5V for broader signal ranges. Integrated cold-junction compensation ensures that temperature readings remain accurate despite fluctuations in the ambient temperature at the terminal block.

Advanced Diagnostic Capabilities Equipped with burnout detection for every channel, the AAT145-S53 S1 can immediately identify a broken thermocouple wire. This diagnostic feature prevents control loops from acting on frozen or erroneous data, allowing for safer fail-state transitions and faster maintenance response.

Hazardous Area Versatility The S53 suffix indicates specific configuration options for explosion protection, allowing the module to be utilized in various safety-rated environments. Its rugged mechanical design is optimized for FIO (Field network I/O) racks, supporting high-density mounting to save valuable control room cabinet space.

Technical Specifications

• Brand: Yokogawa

• Model Number: AAT145-S53 S1

• Product Type: Thermocouple/mV Input Module

• Channels: 16 (Isolated)

• Input Types: Thermocouples (K, J, T, E, R, S, B, N, etc.) and mV signals

• Data Update Period: 1 s (per 16 channels)

• Input Voltage Allowance: ±5 V DC

• Power Consumption: Max 450 mA (5 V DC)

• Isolation Voltage: 500 V AC between input and system

• Weight: 0.26 kg

• Dimensions: 3.2 x 12.5 x 13 cm

• Origin: Japan

Application Areas

The Yokogawa AAT145-S53 S1 is a staple in industries where thermal regulation is the primary process driver:

• Petrochemical Refining: High-temperature monitoring of distillation columns and crackers.

• Power Generation: Managing steam temperature and boiler casing thermometry.

• Metal & Mining: Controlling blast furnace temperatures and smelting processes.

• Chemical Manufacturing: Regulating exothermic reactor temperatures and batch cooling loops.