Product Overview

The AMM22C (Model: AMM22C) is a high-precision analog input multiplexer module specifically 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 AMM22C (Order Number: AMM22C) excels in the acquisition of low-level millivolt (MV) signals and standard 4–20 mA current loops across 16 channels. The "C" revision represents a significant hardware enhancement, delivering superior thermal stability and refined diagnostic capabilities for critical process monitoring in harsh industrial environments.

Utilizing a robust multiplexing architecture, the AMM22C (Part Number: AMM22C) ensures exceptional channel-to-channel consistency and signal integrity. Each of the 16 channels features galvanic isolation, shielding the Field Control Station (FCS) from electrical noise, transients, and ground loops. This module is an essential hardware standard for petrochemical refining, power generation, and heavy manufacturing, where precise measurements of pressure, flow, and temperature are fundamental to operational safety and system reliability.

Detailed Technical Specifications

The AMM22C is designed for deterministic signal acquisition and long-term industrial durability.

• Manufacturer: Yokogawa Electric Corporation

• Model Number: AMM22C

• Series Compatibility: CENTUM VP / CS 3000 (FIO Subsystem)

• Product Type: 16-Channel MV/Analog Input Multiplexer

• Number of Channels: 16 channels, galvanically isolated

• Signal Type Supported: Millivolt (MV) / 4–20 mA DC signals

• Input Resistance: 250 Ω (integrated for current signals)

• Conversion Resolution: 12 to 16-bit (System/Scan cycle dependent)

• Measurement Accuracy: ±0.1% of full scale

• Isolation Architecture: Channel-to-system galvanic isolation

• Withstanding Voltage: 500 V AC between terminals and ground

• Insulation Resistance: 10 MΩ or more (at 500 V DC)

• Data Update Period: Fast sampling synchronized with DCS control cycles

• Operating Temperature: 0°C to +60°C (32°F to 140°F)

• Ambient Humidity: 5 to 95% RH (Non-condensing)

• Dimensions (W x H x D): 32.8 × 107.5 × 130 mm

• Net Weight: 0.35 kg

• Shipping Weight: 3.0 kg (Including protective packaging)

• Manufacturing Origin: Japan