A DCS Q Co., Ltd. - PLC and DCS Industrial Control Equipment Wholesale
Introduction
The Yokogawa AAM21‑S2 is a high‑performance analog input module that supports millivolt (mV), thermocouple (TC), and RTD (resistance temperature detector) signals. Designed for industrial DCS and PLC systems, it provides accurate, reliable data acquisition for temperature and process measurement. Its flexible input options, robust isolation, and compact design make it ideal for use in chemical plants, water treatment facilities, energy systems, and other industrial environments where precision and stability are crucial.
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 | 0–333 Ω nominal (3‑wire configuration) |
| Input Impedance (Voltage/mV Mode) | ~1 MΩ at power-up |
| Conversion Accuracy / Resolution | mV & RTD inputs: ±20 µV; RTD: ±0.08 Ω |
| Data Update Interval | 100 ms per channel |
| Isolation | Full galvanic isolation between inputs and system; withstand voltage 1500 V AC for 1 min |
| Power Supply / Consumption | Powered via I/O module nest; typical current draw is minimal |
| Mounting / Compatibility | Standard Yokogawa analog I/O rack / module nest |
| Signal Conditioning | Thermocouple cold-junction compensation; software-selectable input type and range per channel |
