Yokogawa S9345FA Bus Connector Unit

Overview

The Yokogawa S9345FA is a high-reliability bus connector designed for CENTUM VP and XL distributed control systems. It functions as the communication bridge between field I/O modules and the ESB (Extended SuperBus) or N‑ESB network, ensuring stable, uninterrupted data exchange in complex automation environments. The module is engineered for rugged industrial operation, supporting hot-swapping to facilitate maintenance without system downtime.

Key Features

• Provides seamless communication between CPU and I/O subsystems via ESB/N‑ESB bus

• Supports hot-swappable installation for minimal maintenance impact

• Compatible with redundant power supply systems (R4.01 or later)

• Compact and lightweight design for easy integration into I/O racks

• Robust construction for operation in demanding industrial environments

Technical Specifications

General

• Manufacturer: Yokogawa

• Model: S9345FA

• Product Type: Bus Connector Unit

• Origin: Japan

Bus Compatibility & Function

• Bus Types Supported: CENTUM VP/XL ESB, N‑ESB

• Primary Role: Communication interface for field I/O modules and CPU

• Hot-Swap Capability: Yes

Electrical

• Power Supply: 24 V DC

• Power Consumption: 5 W typical

Environmental Ratings

• Operating Temperature: −20 °C to +70 °C

• Humidity: 5% to 95% RH (non-condensing)

• Protection Rating: IP20

Physical Dimensions

• Most Common: 50 × 32.8 × 107.5 mm

• Weight: 0.2 kg

Applications

• CENTUM VP/XL DCS field I/O communication

• High-availability process control networks

• Integration into redundant ESB/N‑ESB power systems

FAQ

Q: Can the S9345FA be replaced without shutting down the system?
A: Yes, it supports hot-swapping, enabling maintenance while the system remains operational.

Q: Is it compatible with all CENTUM VP I/O modules?
A: It is compatible with standard ESB and N‑ESB I/O modules. For specific module support, refer to the system manual.

Q: What environment can it operate in?
A: Industrial ambient temperatures from −20 °C to +70 °C and humidity up to 95% non-condensing.

Comparison with Similar Models
Compared with older S9345EA units, the S9345FA supports enhanced redundant power systems and offers a more compact design, reducing rack space usage while maintaining identical communication performance.