Yokogawa AMM22J Voltage Input Multiplexer Module

Overview

The Yokogawa AMM22J is a high-precision voltage input multiplexer designed for CENTUM CS and CENTUM VP distributed control systems (DCS). It consolidates multiple analog voltage signals from process instruments into a single controller interface, delivering reliable and noise-immune signal acquisition in challenging industrial environments, including oil & gas, chemical processing, and power generation.

This module emphasizes signal integrity, wide voltage compatibility, and robust channel-to-bus isolation, ensuring stable operation under EMI, vibration, and temperature variations.

Technical Specifications

Input Characteristics

• Number of input channels: 16

• Input type: DC Voltage

• Supported voltage ranges: ±10 V, 0–10 V, 0–5 V DC

• Input impedance: ~1 MΩ

• Accuracy: ±0.1% of full scale

• Common-mode voltage tolerance: ±10 V DC

• Channel scan time: ~100 ms per channel

• Notes: Some distributors mention 0–20 mA and 4–20 mA support, but primary GS-based specification is voltage-only

Isolation & Protection

• Channel-to-bus isolation: 1500 V AC for 1 minute

• Designed for high EMI immunity

• Maintains stable operation under vibration and electrical noise

Power Requirements

• Power supply: Provided via I/O base

• Power consumption: 4.5 W

Physical Specifications

• Dimensions (varies by supplier/mounting style):

• 45 × 97 × 103 mm, weight 0.3 kg

• Country of origin: Japan

Environmental Ratings

• Operating temperature: −20 °C to +55 °C

• Storage temperature: −40 °C to +70 °C

• Humidity: 5–95% RH, non-condensing

Functional Overview

The AMM22J multiplexes up to 16 voltage inputs, providing accurate and reliable data for process monitoring. Its high input impedance and strong isolation ensure integrity of critical control signals in CENTUM DCS environments.

Applications

• Multi-channel voltage signal acquisition

• Data collection for industrial process monitoring

• Integration with CENTUM CS and VP distributed control systems

FAQ

Q: Can the AMM22J handle current signals such as 4–20 mA?
A: The primary specification is voltage input only. Some distributors list current support, but official GS documentation specifies voltage.

Q: Is it suitable for high-vibration environments?
A: Yes. The module is designed to operate reliably under vibration and EMI conditions typical in industrial installations.

Q: What is the scan time per channel?
A: 100 ms per channel.