Yokogawa AAT145-S03 TC/mV Analog Input Module

Product Description

The AAT145-S03 is a high-accuracy TC/mV analog input module manufactured by Yokogawa for use in CENTUM VP, CENTUM CS3000, and compatible ProSafe-RS system configurations.
This module is designed to acquire low-level temperature and millivolt signals from field sensors and convert them into stable digital data for process monitoring and control.

Unlike analog output modules, the AAT145-S03 functions strictly as an input interface, receiving signals from thermocouples and millivolt sources and transmitting them to the control system with high precision and electrical isolation.

Input Signal Function

The AAT145-S03 receives and conditions low-energy analog signals generated by temperature and measurement sensors. Each channel independently processes the input, ensuring accurate acquisition even in electrically noisy industrial environments.

Supported signal types include:

Thermocouple (TC) temperature signals
Millivolt (mV) analog signals
Low-level sensor outputs requiring high input sensitivity

Technical Specifications

General

Model: AAT145-S03
Manufacturer: Yokogawa
Module Type: TC/mV Analog Input Module
Mounting: Rack-mount, plug-in I/O module
Weight: Approx. 0.70 lbs (0.32 kg)

Input Characteristics

Input Types:
Thermocouple (multiple TC types, system-defined)
Millivolt (mV) voltage input

Number of Channels: Configuration-dependent (commonly 8 or 16)
Input Resolution: High-resolution A/D conversion
Measurement Accuracy: Suitable for precision temperature and process measurement
Sampling Performance: Optimized for stable and repeatable signal acquisition

Isolation

Channel-to-channel isolation
Channel-to-system isolation
Designed to prevent ground loops and common-mode noise interference

Diagnostics

Input signal status monitoring
Sensor disconnection and burnout detection
Internal module self-diagnostics
Fault and status reporting to the host system

Mechanical and Environmental Characteristics

Compatible with Yokogawa I/O bases and TC/mV terminal boards
Natural convection cooling (fanless design)
Industrial-grade enclosure and coated PCB

Operating Temperature: −20 °C to +70 °C
Operating Humidity: 5–95% RH, non-condensing
EMC Performance: Designed for high-noise industrial cabinets
Vibration Resistance: Suitable for fixed control-room installations

System Integration

The AAT145-S03 integrates seamlessly with Yokogawa distributed control and safety systems. Configuration, scaling, and diagnostics are performed through the Yokogawa engineering environment, enabling consistent signal handling and simplified maintenance.

Compatible Platforms:

CENTUM VP
CENTUM CS3000
ProSafe-RS (configuration-dependent)

Typical Applications

Thermocouple temperature measurement
Furnace and reactor temperature monitoring
Process equipment temperature feedback
Millivolt-based sensor acquisition
Critical temperature measurement in control and safety loops

Frequently Asked Questions

Q: Is the AAT145-S03 an analog output module?
A: No. The AAT145-S03 is a TC/mV analog input module. It receives sensor signals and does not generate control outputs.

Q: Can it accept multiple thermocouple types?
A: Yes. Supported TC types are defined through system configuration.

Q: Is this module suitable for high-accuracy temperature measurement?
A: Yes. It is designed for precise low-level signal acquisition in industrial control systems.