Product Overview

The AMM32C (Model: AMM32C) is a high-density RTD (Resistance Temperature Detector) input multiplexer module purpose-built for the Yokogawa CENTUM VP and CENTUM CS 3000 Distributed Control Systems (DCS). As a specialized component of the Field I/O (FIO) subsystem, the AMM32C (Order Number: AMM32C) provides 32 isolated channels for the deterministic acquisition of precision temperature data. While the standard AMM32 series is typically configured for 4–20 mA current loops, the AMM32C (Part Number: AMM32C) is hardware-optimized for RTD multiplexing, enabling large-scale thermal monitoring across complex industrial processes within a single I/O slot.

Utilizing a high-speed multiplexing architecture, this module ensures superior channel-to-channel consistency and significant insulation resistance (≥100 MΩ). The AMM32C employs robust galvanic isolation to shield sensitive millivolt-level temperature signals from ground loops and electromagnetic interference (EMI). This module is an engineering standard for the petrochemical, power generation, and utility sectors, where high-density monitoring of motor bearings, chemical reactors, and large-scale heat exchangers is critical for maintaining plant safety and efficiency.

Detailed Technical Specifications

The AMM32C provides industrial-grade thermal acquisition with high dielectric strength and stability.

• Manufacturer: Yokogawa Electric Corporation

• Model Number: AMM32C

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

• Product Type: 32-Channel RTD Input Multiplexer Module

• Number of Channels: 32 Analog Input Channels (Isolated)

• Input Sensor Support: Pt100 RTD (Supports 3-wire/4-wire via specific terminal blocks)

• Signal Interface: 40-pin connector for KS8 series I/O cables

• Insulation Resistance: Minimum 100 MΩ (measured at 500 V DC)

• Withstanding Voltage: 500 V AC between field terminals and system logic

• Measurement Accuracy: ±0.1% of full scale (Ambient 25 ºC)

• Diagnostic Features: Integrated open-circuit detection, short-circuit monitoring, and signal quality status

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

• Operating Ambient Temperature: 0 to 50 ºC (32 to 122 ºF)

• Ambient Humidity: 5 to 90 %RH (Non-condensing)

• Mounting: Occupies one FIO node slot (ANB or ANL units)

• Net Weight: 0.8 kg

• Shipping Weight: 3.0 kg

• Manufacturing Origin: Japan