Product Description

The AMM12T S2 is a high-density voltage input multiplexer module engineered for Yokogawa’s legacy CENTUM CS and CS 3000 control systems. Designed for environments where multiple DC voltage signals must be consolidated, this module sequentially samples input channels using multiplexing technology, providing a space- and cost-efficient solution for non-safety-critical data acquisition.

The S2 revision incorporates enhanced electronics for improved thermal stability and long-term reliability. Manufactured in the USA to industrial-grade standards, the AMM12T S2 is optimized for 24/7 operation and fits securely into Yokogawa RIO (Remote I/O) or local I/O nests, ensuring consistent electrical contact with the system backplane.

Technical Specifications

Application Scenarios

• Consolidation of multiple auxiliary voltage signals into a single I/O slot

• Monitoring tank levels, secondary pressure points, and temperature transmitter outputs

• Commonly used in pulp & paper mills, chemical plants, and legacy power stations

• Ideal for high-density signal acquisition in older CENTUM CS/CS 3000 installations

Frequently Asked Questions

Q1: What is the advantage of a multiplexer module?
A: Multiplexing allows a single module to handle more input points than standard continuous-sampling modules. While channel updates occur sequentially (introducing minimal latency), this significantly reduces cost and cabinet space for large-scale monitoring.

Q2: Is the AMM12T S2 hot-swappable?
A: Although most Yokogawa RIO modules support hot-swapping, the AMM12T S2 handles multiplexed signals. It is recommended to follow the "Off-line" replacement procedure in the Yokogawa Maintenance Manual to prevent temporary data fluctuations at the operator station.