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- Yokogawa
- RB401/S4
- RIO Bus Module
- Japan
- 143 × 25.4 × 95.3 mm
- 0.25 kg
- Xiamen, China
- New & In Stock
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Product Overview
The Yokogawa RB401/S4 is a RIO (Remote Input/Output) Bus Module designed for Yokogawa CENTUM CS and CENTUM VP Distributed Control Systems (DCS). It provides a high-speed communication interface between the Field Control Station (FCS) and Remote I/O stations, ensuring reliable transmission of process data and control commands throughout the automation network.
Designed for continuous industrial operation, the RB401/S4 enhances distributed system performance by supporting stable, deterministic communication between controllers and field devices. Its compact plug-in design allows easy installation and maintenance while improving system flexibility and scalability.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Yokogawa |
| Model | RB401/S4 |
| Product Type | RIO Bus Module |
| Communication Type | Remote Input/Output (RIO) Bus |
| Function | Remote I/O communication interface |
| System Platform | Yokogawa CENTUM CS / CENTUM VP |
| Communication Mode | High-speed industrial data transmission |
| Installation Type | Plug-in Module |
| Mounting Method | Rack-mounted |
| Protection Rating | IP20 |
| Dimensions | 143 × 25.4 × 95.3 mm |
| Weight | 0.25 kg |
Function and Working Principle
The RB401/S4 serves as the communication interface between the Field Control Station and distributed Remote I/O modules. It transfers control commands from the controller to remote field devices while collecting process variables, equipment status, and diagnostic information from Remote I/O stations.
The module maintains reliable communication across the RIO network, ensuring accurate data exchange and synchronized operation of distributed automation equipment.
Operating Sequence
- The Field Control Station generates control commands.
- The RB401/S4 transmits commands through the RIO communication bus.
- Remote I/O modules receive and execute the commands.
- Process data and equipment status are returned through the RIO network.
- The controller processes the received information for monitoring and control.
Key Features
- High-speed Remote I/O communication
- Reliable industrial data transmission
- Supports distributed control system architecture
- Stable communication performance
- Compact plug-in module design
- Easy installation and maintenance
- High operational reliability
- Seamless integration with Yokogawa CENTUM platforms
System Role
The RB401/S4 functions as a Remote I/O communication interface, enabling efficient communication between the Field Control Station and distributed Remote I/O modules.
Typical System Architecture
Engineering Workstation → Field Control Station (FCS) → RB401/S4 RIO Bus Module → Remote I/O Network → Remote I/O Modules → Field Devices
Industrial Applications
The RB401/S4 is widely used in:
- Oil and gas production
- Chemical and petrochemical plants
- Power generation facilities
- Water and wastewater treatment
- Refinery automation
- Pharmaceutical manufacturing
- Food and beverage processing
- Pulp and paper mills
- Marine automation systems
- General industrial process control
Installation Guidelines
- Install the module in the designated slot of a compatible Yokogawa controller rack.
- Ensure the module is securely connected to the system backplane.
- Connect the RIO communication cable according to system specifications.
- Verify communication parameters before commissioning.
- Perform communication diagnostics after installation.
- Inspect communication cables and connectors regularly during maintenance.
Compatible Components
The RB401/S4 is compatible with:
- Yokogawa CENTUM CS Controllers
- Yokogawa CENTUM VP Controllers
- Yokogawa Field Control Stations (FCS)
- Yokogawa Remote I/O Modules
- Yokogawa Bus Interface Cards
- Yokogawa Communication Modules
- Yokogawa Engineering Workstations
- Yokogawa Operator Stations
Alternative Models
| Model | Description |
|---|---|
| RB301 | Bus Interface Master Card |
| RB401/S2 | RIO Bus Module |
| RB401/S3 | RIO Bus Module |
| RB801 | Remote Bus Interface Module |
| NFSB100 | Bus Repeat Module |
Advantages
- Reliable high-speed RIO communication
- Stable data transmission for distributed systems
- Supports large-scale industrial automation
- Compact and durable industrial construction
- Easy integration into Yokogawa CENTUM platforms
- High reliability for continuous operation
- Simplified maintenance and replacement
- Long operational service life
Frequently Asked Questions
What is the RB401/S4 used for?
The RB401/S4 is used as a RIO Bus Module to provide communication between Yokogawa Field Control Stations and Remote I/O modules.
Is the RB401/S4 a CPU module?
No. It is a communication interface module designed for Remote I/O bus communication rather than executing control logic.
Which systems are compatible with the RB401/S4?
The module is compatible with Yokogawa CENTUM CS and CENTUM VP distributed control systems.
How is the module installed?
The RB401/S4 is installed as a plug-in module in a compatible Yokogawa controller rack and connected to the RIO communication network.
Which industries commonly use the RB401/S4?
It is widely used in oil and gas, chemical processing, power generation, water treatment, pharmaceutical manufacturing, food and beverage processing, pulp and paper, and other industrial automation applications.
Conclusion
The Yokogawa RB401/S4 RIO Bus Module is a dependable industrial communication module designed for high-speed Remote I/O connectivity in Yokogawa distributed control systems. Featuring stable communication performance, compact plug-in construction, reliable data transmission, and seamless integration with CENTUM platforms, it provides an efficient solution for distributed industrial automation and process control.