A DCS Q Co., Ltd. - PLC and DCS Industrial Control Equipment Wholesale
Introduction
The Yokogawa AAM21J (also AAM21) module is a versatile analog input module that supports millivolt (mV), thermocouple, and RTD (resistance temperature detector) signals, making it ideal for temperature measurement, process sensing, and multi‑sensor integration. Its broad signal compatibility — from mV level sensors to thermocouples and precision RTDs — gives engineers a flexible, all‑in‑one solution for analog input needs. Built to meet industrial standards and compatible with Yokogawa DCS/PLC systems, this module delivers stable, accurate data acquisition even in demanding process environments.
Technical Specifications
| Parameter | Details |
|---|---|
| Supported Signal Types | mV, Thermocouple (types J, K, E, B, R, S, T, N), RTD (e.g., Pt100 / JPt100, 3‑wire) |
| mV Input Range | –50 to +150 mV |
| RTD / Resistance Input Range | For RTD (3‑wire) / resistance input 0–333 Ω nominal (wiring resistance per wire ≤ 150 Ω) |
| Input Impedance (Voltage / mV Mode) | ~1 MΩ at power‑up |
| Conversion Accuracy / Resolution | mV & RTD inputs: ±20 µV resolution; RTD: ±0.08 Ω precision |
| Data Update Period | 100 ms typical per channel |
| Isolation | Full isolation between input signals and backplane/system; withstand voltage 1500 V AC/min |
| Power Supply / Consumption | Powered by standard I/O module nest; typical current draw per module modest |
| Mounting / Compatibility | Installs in Yokogawa analog I/O nest (e.g., AMN11 or compatible backplane) |
| Signal Conditioning | Hot‑junction (cold-junction) compensation for thermocouples; software‑selectable input type and range per channel |
