Yokogawa S9841DA Analog Input Module

Overview

The Yokogawa S9841DA is an analog input module designed for Yokogawa PLC and DCS systems. It provides precise analog signal acquisition and high-speed data processing, with strong channel isolation for reliable operation in critical industrial automation environments. The module supports analog input and optional digital I/O functions, ensuring accurate data collection from field instruments and fast response for control tasks.

Key Features

• High-precision analog input for 4–20 mA transmitters, temperature sensors, and pressure/flow devices

• High-speed data processing for real-time monitoring and control

• Optional digital I/O: 8 inputs + 8 outputs, response time <1 ms, isolation 1500 V AC

• Hot-swap support for easy maintenance

• Industrial-grade design with strong EMI immunity

Technical Specifications

General Information

Analog Input Function

• High-accuracy signal acquisition

• Supports 4–20 mA transmitters

• Temperature, pressure, and flow measurement

• Strong channel-to-channel isolation for noise-sensitive environments

Digital I/O Function (Optional)

• 8 digital input channels + 8 digital output channels

• Input voltage: 0–24 VDC

• Output voltage: 24 VDC

• Response time: <1 ms

• Isolation: 1500 V AC

• Hot-swap capable

Electrical & Environmental

Mechanical

• Mounting: Rack-mounted in Yokogawa PLC/DCS chassis

• Form Factor: Modular I/O card

• Cooling: Passive convection

Applications

• Process control: oil & gas, chemical, refining

• Power generation and energy management

• Manufacturing automation

• High-precision analog signal acquisition

• Digital actuator, relay, and alarm control

FAQ

Q1: What analog signal types does the S9841DA support?
A1: It supports 4–20 mA current signals, temperature sensor inputs, and signals from pressure and flow instruments.

Q2: Can it be used for digital I/O control?
A2: Yes, some variants provide 8 input and 8 output digital channels with fast response and isolation.

Q3: Is it suitable for high EMI industrial environments?
A3: Absolutely. The module meets industrial-grade EMI/EMC standards for reliable operation in noisy environments.

Q4: Does it support hot-swapping?
A4: Yes, hot-swap capability allows easy replacement without shutting down the system.

Q5: How does it compare to other S9841 series models?
A5: S9841DA focuses on high-precision analog input and mixed I/O with strong isolation. S9841DB only provides analog input, while S9841DC offers higher channel density or extended digital I/O capabilities.