Product Overview

The AMM22M is a high-density millivolt analog input module designed for Yokogawa CENTUM CS 3000 and CENTUM VP distributed control systems. It provides 22 independent low-level mV input channels, optimized for precise acquisition of delicate analog signals.

With high input impedance and robust field-to-system isolation, the AMM22M maintains excellent signal integrity in electrically noisy industrial environments. It is well suited for thermocouples, shunt voltage monitoring, and other low-voltage instrumentation requiring stable and accurate measurement.

Technical Specifications

Key Features and System Integration

• High-Density Design
  Integrates 22 millivolt input channels into a single module slot, reducing cabinet space and wiring complexity.

• Superior Signal Integrity
  High input resistance minimizes signal loading, ensuring accurate acquisition of low-level voltages from remote field sensors.

• Advanced Diagnostics
  Built-in burnout detection enables rapid identification of open wiring or sensor failure.

• Native Yokogawa Compatibility
  Fully compatible with RIO (Remote I/O) and FIO (Field Network I/O) architectures within CENTUM systems.

Application Scenarios

• Temperature Measurement
  Direct millivolt acquisition from thermocouples requiring wide-range and high-resolution input.

• Electrolysis & High-Current Systems
  Monitoring voltage drops across shunt resistors in electrochemical and power-intensive processes.

• Laboratory & R&D Automation
  Precise capture of low-level analog signals from analytical and experimental instrumentation.

Frequently Asked Questions (FAQ)

Q: Does the AMM22M provide channel-to-channel isolation?
A: No. The module provides isolation between the field side and the system logic, but all 22 channels share a common ground.

Q: What occurs if a sensor wire breaks?
A: The configurable burnout function forces the signal High, Low, or maintains the last value, enabling predictable and safe control behavior.

Q: Can the AMM22M be hot-swapped?
A: Yes. Within CENTUM VP and CS 3000 systems, the module supports online replacement, subject to I/O nest and system configuration.