Description

Yokogawa AMM12T Voltage Input Multiplexer Module

Core Overview

• Type: Voltage Input Multiplexer Module
• Channels: 16 isolated voltage input channels
• Compatibility: CENTUM CS 1000, CS 3000, VP DCS
• Suffix Meaning:
  • T: Terminal‑type connection
  • S2: Enhanced hardware revision (current production)
• Status: In production (S2 version)

Key Features

• 16‑Channel Isolation: Each channel isolated from system & other channels (1500 V AC)
• Wide Input Ranges: Supports multiple voltage & temperature inputs
• High Accuracy: Precise measurement for industrial process monitoring
• Fast Update: Data update period up to 10 ms
• Compact Design: Fits standard I/O module nests
• Easy Wiring: Terminal‑block connection (M4 screws)

Technical Specifications

Input Ranges & Performance

Electrical & Physical

• Input Impedance: 1 MΩ (voltage)
• Allowable Input: -30 to +30 V DC (voltage)
• Isolation: 1500 V AC (1 min) between channels & system
• Update Period: 10 ms (max)
• Power Supply: 5 V DC (from I/O nest)
• Operating Temp: -20°C to +70°C
• Dimensions: 69 × 49 × 85 mm
• Weight: ~523 g

AMM12T vs AMM12T‑S2

• AMM12T: Legacy version (discontinued)
• AMM12T‑S2: Current production, fully backward‑compatible
  • Improved component reliability
  • Enhanced diagnostics
  • Same pinout & wiring; no rewiring needed

Applications

• Process monitoring in oil & gas, power, chemical, and manufacturing
• Multi‑point temperature/voltage data acquisition
• Integration with CENTUM DCS for real‑time process control

Complementary Modules

• AMM12C: Same function, connector‑type (instead of terminal)
• AMM22T: 16‑channel current input multiplexer
• AMM32T: 16‑channel thermocouple/RTD multiplexer