Technical Description

The NFBU200-S15 is a rack-mount base module for Yokogawa FIO (Field Interface Option) systems. It provides the physical connectivity and internal SB Bus to host power supplies, CPU modules, and I/O signal modules. Designed for flexible architecture, the NFBU200-S15 supports single or duplex power supply configurations, ensuring high availability for mission-critical process control. The module mounts on DIN rails, offering mechanical stability in vibration-prone industrial environments.

Technical Specifications

Operational Application

The NFBU200-S15 serves as the chassis backbone for localized I/O nodes in distributed control systems. It centralizes signal processing for field devices such as transmitters, actuators, and discrete switches. The ability to support duplex CPU and power configurations makes it ideal for:

• Emergency Shutdown Systems (ESD)

• Fire and Gas (F&G) protection loops

This ensures hardware redundancy for critical process uptime and site safety.

Frequently Asked Questions

Does the NFBU200-S15 include the power supply modules?
No. Power supply modules, CPUs, and I/O modules are ordered separately based on system load and channel requirements.

What is the impact of duplexing the CPU on I/O capacity?
With a duplex CPU, the available I/O slots are reduced from 8 to 6 to accommodate the secondary processor and internal bus redundancy logic.

Is this module compatible with all FIO I/O modules?
It is compatible with standard FIO analog and digital modules, but always verify the module datasheet to ensure alignment with the S15 backplane requirements.