S9841DA | Yokogawa | FA-M3 / CENTUM | Mixed Analog/Digital I/O Module

Product Description

The Yokogawa S9841DA is a hybrid I/O module designed for integration with FA-M3 controllers and CENTUM distributed control systems. It combines analog input capability with discrete digital outputs in a single compact unit, reducing cabinet space requirements and simplifying system architecture. With sub-millisecond response times and galvanic isolation, it ensures reliable performance in high-speed industrial automation environments.

Key Features

• Hybrid I/O Design: 8 configurable analog/digital input channels plus 8 dedicated digital outputs.

• High-Speed Processing: <1 ms logic response for deterministic control.

• Electrical Protection: 1500 V AC galvanic isolation between field and logic circuits.

• Compact and Efficient: Low power consumption (~2 W) with hot-swappable maintenance capability.

• Industrial-Grade Reliability: Rugged construction for EMI-heavy environments.

Technical Specifications

Application Scenarios

• Process Control Skids: Compact integration of analog sensors and digital actuators.

• Boiler and Utility Systems: Monitoring temperature/pressure while controlling limit switches.

• Chemical Dosing Units: Mixed input/output handling for precise dosing control.

• Water Treatment Plants: Flexible monitoring and actuation in filtration and pumping systems.

FAQ

Q: How do the hybrid inputs function?  

A: Inputs can be configured for analog or digital sensing depending on wiring and software setup.

Q: Is the module suitable for safety instrumented systems (SIS)?  

A: It is primarily intended for basic process control (BPCS). Suitability for SIS depends on SIL requirements.

Q: Can the module be replaced online?  

A: Yes, it supports hot-swapping for maintenance without system shutdown.