Yokogawa NFAI841-S00/A4S00 Analog I/O Module

The Yokogawa NFAI841-S00/A4S00 Analog I/O Module is a high-performance component engineered for modern process control systems. It is designed to handle precise analog signal processing for critical industrial environments, offering both input and output functions in a single compact module. Belonging to the N-IO series, this module combines flexibility, reliability, and accuracy, making it an essential part of distributed control systems (DCS) and safety instrumented systems (SIS). Its advanced diagnostic features, configurable channels, and seamless integration capabilities make it suitable for complex and high-demand industrial applications.

Product Specifications

Applications

• Distributed Control Systems (DCS): Provides accurate acquisition and output of analog signals for process automation systems.

• Safety Instrumented Systems (SIS): Compatible with Yokogawa ProSafe-RS for high-availability safety-critical processes.

• Oil & Gas: Handles precise monitoring and control in upstream, midstream, and downstream operations.

• Power Generation: Used for control and monitoring of turbines, boilers, and auxiliary systems.

• Chemical & Petrochemical: Ensures precise control under hazardous environmental conditions.

• Water Treatment & Utilities: Ideal for monitoring flow, pressure, and level parameters in water and wastewater plants.

Product Advantages

• Dual Functionality: Supports both analog input and output within one module, reducing hardware requirements.

• High Accuracy: Maintains ±0.1% span accuracy with 16-bit resolution for superior process performance.

• Advanced Diagnostics: Built-in loop integrity and self-diagnostic functions improve reliability and predictive maintenance.

• Flexible Channel Configuration: Each channel can be configured as input or output, providing engineering flexibility.

• Redundancy Support: Compatible with redundant systems to ensure continuous process operation.

• Compact Design: Optimized size for control panels while delivering high channel density.

FAQ

1. What types of analog signals are supported by the NFAI841-S00/A4S00?

   It supports 4–20 mA DC and ±10 V DC signals for both inputs and outputs.

2. Does the module allow channel configuration individually?

   Yes, all 8 channels can be configured as either input or output.

3. What is the resolution for signal conversion?

   It provides 16-bit resolution for both analog-to-digital and digital-to-analog conversions.

4. Is isolation provided for all channels?

   Yes, it offers isolation between channels and between channel and ground for electrical safety.

5. What is the update cycle of the module?

   The typical update time is approximately 100 ms for all channels.

6. Can the module be used in redundant systems?

   Yes, it supports redundancy when implemented with a compatible Yokogawa baseplate and system.

7. Does the NFAI841-S00/A4S00 have built-in diagnostic features?

   Yes, it includes self-diagnosis, channel fault detection, and loop monitoring capabilities.

8. What is the power requirement for the module?

   It operates on 24 V DC supplied through the system baseplate.

9. Is hot-swapping supported for this module?

   Yes, it can be hot-swapped without shutting down the system, provided redundancy is enabled.

10. Is the module compliant with hazardous area certifications?

    Yes, it complies with ATEX and IECEx certifications for use in hazardous environments (specific variants).