Product Overview

The Yokogawa SSB401-13 is a high-performance ESB (Extended Serial Backplane) bus interface slave module specifically designed for the CENTUM VP and ProSafe-RS control systems. This module serves as the primary communication link between safety node units and the master control stations, enabling the seamless transmission of safety-critical data across the network. By acting as an essential bridge, the SSB401-13 ensures that real-time information from field sensors and actuators is synchronized with the central logic solver. Its design is optimized for high-speed deterministic communication, which is a prerequisite for functional safety in modern automated industrial environments.

Technical Characteristics

The SSB401-13 is engineered to maintain system integrity through advanced hardware redundancy and high-speed data protocols:

High-Speed Redundant Communication To eliminate potential single points of failure, the SSB401-13 supports a dual-redundant communication architecture. It delivers a data transmission rate of 128 Mbps over the ESB bus, ensuring that safety-critical signals are processed with minimal latency. This redundant design allows for uninterrupted system operation even if one communication pathway is compromised.

Scalability and Integration This interface module supports the connectivity of up to 13 safety node units within a single bus segment, providing significant flexibility for large-scale system expansion. Its compact form factor allows for high-density installation within standard I/O cabinets, facilitating efficient space utilization without sacrificing thermal management or performance.

Functional Safety Compliance Developed to meet the rigorous requirements of IEC 61508, the SSB401-13 is suitable for use in Safety Instrumented Systems (SIS). It provides the robust electrical isolation and fault-tolerant capabilities necessary for maintaining a high Safety Integrity Level (SIL) in hazardous process areas.

Technical Specifications

• Brand: Yokogawa

• Model Number: SSB401-13

• Product Type: ESB Bus Interface Module (Slave)

• Communication Speed: 128 Mbps

• Redundancy: Dual-redundant bus support

• Capacity: Supports up to 13 safety node units

• Power Consumption: 0.5 A at 5 V DC

• Weight: 0.3 kg

• Dimensions: 3.3 x 10.7 x 13.0 cm

• Origin: Japan

Application Areas

The Yokogawa SSB401-13 is a fundamental component in Safety Instrumented Systems (SIS) across various heavy industries. It is primarily utilized in:

• Emergency Shutdown Systems (ESD): Ensuring rapid and reliable closure of isolation valves.

• Fire and Gas (F&G) Systems: Managing the communication between detectors and suppression units.

• Burner Management Systems (BMS): Controlling fuel valves and ignition sequences in boilers and furnaces.

• Turbine Protection: Facilitating high-speed monitoring and overspeed protection for large rotating machinery.