The Yokogawa RB401, also cataloged as theRIO Bus Module, is a dedicated hardware interface designed for Remote I/O (RIO) communication within Yokogawa’s CENTUM distributed control systems. It provides stable bus connectivity between controllers and remote I/O subsystems, ensuring deterministic communication and redundancy support.
Hardware Specifications
Manufacturer: Yokogawa
Product No.: RB401
Product Type: RIO Bus Module
Application: Remote I/O bus communication for CENTUM systems
Bus Type: RIO (Remote I/O) interface
Isolation: Optical isolation for noise immunity
Transmission Speed: High‑speed bus communication (typically 128 Mbps for RIO/ESB systems)
Connector Type: Dedicated backplane and bus connectors
Compatibility: CENTUM VP and CENTUM CS 3000 series
Redundancy: Supports simplex and dual‑redundant bus configurations
Weight: ~1.5 Kg (shipping weight may vary)
Features
RIO Bus Communication: Provides reliable data transfer between controllers and distributed I/O modules.
High‑Speed Transmission: Ensures deterministic and synchronized communication across subsystems.
Optical Isolation: Protects against electrical noise and interference.
Redundancy Support: Operates in simplex or dual‑redundant configurations for fault tolerance.
System Integration: Seamlessly integrates into Yokogawa CENTUM VP architectures.
Frequently Asked Questions (FAQ)
Q: What is the primary function of the RB401? A: It serves as a bus module for RIO communication, linking controllers with distributed I/O subsystems.
Q: Does the RB401 support redundancy? A: Yes, it supports simplex and dual‑redundant bus configurations.
Q: Which systems are compatible with the RB401? A: It is compatible with Yokogawa CENTUM VP and CENTUM CS 3000 series control systems.
Field Installation Guidelines
Mount the RB401 securely within the designated rack slot.
Ensure proper seating of bus connectors to maintain communication integrity.
Maintain separation between bus cabling and high‑voltage wiring.
Verify redundancy configuration during commissioning.
Perform diagnostic checks to confirm stable RIO bus communication.
