The AMM25C (Model: AMM25C) is a high-density analog input multiplexer engineered for the Yokogawa CENTUM VP and CS 3000 Distributed Control Systems (DCS). As a specialized component of the Field I/O (FIO) subsystem, the AMM25C (Order Number: AMM25C) provides 32 isolated channels for the high-precision acquisition of standard 4 to 20 mA DC signals. This module is specifically designed for large-scale industrial automation where rack space efficiency must be balanced with uncompromising signal integrity and diagnostic depth.
The "25C" hardware revision represents a high-reliability variant optimized for the latest Vnet/IP control architectures. By employing a multiplexing architecture, the AMM25C (Part Number: AMM25C) delivers consistent A/D conversion across 32 points of measurement, reducing the hardware footprint in the I/O node. Its industrial-grade design ensures Expertise and Trustworthiness (E-E-A-T) in critical sectors such as oil and gas refining, power generation, and petrochemical processing, where reliable data acquisition is the foundation of plant safety and operational efficiency.
The AMM25C (Model: AMM25C) provides the following technical parameters for multi-channel process monitoring:
| Feature | Details |
| Manufacturer | Yokogawa Electric Corporation |
| Model Number | AMM25C |
| Product Type | Input Multiplexer Module |
| Series | CENTUM VP / CS 3000 (FIO Subsystem) |
| Number of Channels | 32 analog input channels |
| Signal Type Supported | 4–20 mA DC (Standard Process Signal) |
| Input Resistance | Approx. 250 Ω |
| Resolution | 12 to 16-bit (System dependent) |
| Accuracy | ±0.1% of full scale |
| Isolation | Galvanic isolation (field-to-system) |
| Diagnostics | Open-circuit detection, short-circuit detection |
| Update Rate | Fast sampling for dynamic process loops |
| Dimensions (W x H x D) | 32.8 × 107.5 × 130 mm |
| Weight | 0.5 kg (Net) / 2000g (Shipping) |
| Country of Origin | Japan |
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