Product Overview

The Yokogawa F9342AF is a dedicated FOUNDATION Fieldbus Host Adaptor designed for seamless integration within the CENTUM VP Distributed Control System (DCS). It serves as the interface between the Field Control Station (FCS) and FOUNDATION Fieldbus H1 segments, enabling high-speed, bi-directional digital communication with intelligent field devices. The module manages network scheduling, data exchange, and control-in-the-field (CIF) operations to ensure timely and deterministic execution of process control functions. We supply this unit as 100% brand new, original factory hardware manufactured in France to ensure high reliability, stable performance, and long-term operation in industrial environments.

Technical Specifications

Engineering Advantages

Optimized Network Scheduling
The F9342AF manages precise macrocycle timing for FOUNDATION Fieldbus communications, ensuring that control function blocks execute in the correct sequence with minimal jitter and consistent process synchronization.

Rugged Heavy-Duty Construction
With a robust mechanical design and 1.2 kg weight, the adaptor is built to withstand industrial vibration and harsh environments, making it suitable for applications in power plants, refineries, and heavy manufacturing facilities.

Superior Electromagnetic Compatibility
Engineered to meet strict European EMC standards, the module effectively filters out electromagnetic noise from nearby electrical equipment, maintaining stable and reliable H1 communication.

Simplified Fieldbus Integration
Supports FDT/DTM-based device management, allowing engineers to configure, monitor, and diagnose multiple field instruments from a centralized engineering station, reducing field intervention and maintenance effort.

FAQs

Does the F9342AF require an external power conditioner?
Yes, an external Fieldbus Power Conditioner is required to supply 9–32 V DC to the H1 segment devices. The adaptor itself handles communication, not field power distribution.

What is the maximum cable length for H1 networks?
Up to approximately 1,900 meters using Type A shielded twisted-pair cable. Repeaters can extend this distance, subject to network design and timing considerations.

How does the module handle device failures?
It continuously monitors the segment’s device list (“Live List”). If a device fails or disconnects, the module reports the event to the CENTUM VP system for operator awareness and maintenance actions.

Can the F9342AF be hot-swapped?
Yes, in redundant configurations. In single-host setups, removing the module will interrupt communication on that segment, so replacement is recommended during maintenance windows unless redundancy is implemented.