Technical Overview

The EC401-50 S3 is a high-speed ESB Bus Coupler for Yokogawa CENTUM VP and ProSafe-RS systems. Installed in a Field Control Unit (FCU), it provides the primary interface for local I/O nodes, ensuring deterministic transmission of process data with minimal latency.

The Style 3 (S3) hardware revision offers enhanced data throughput, improved thermal stability, and increased resilience to electromagnetic interference (EMI), making it suitable for high-density, safety-critical process control applications.

Detailed Specifications

Application & Deployment

• Connects local I/O nodes to FCU for real-time process monitoring

• Supports dual-redundant configurations for zero-downtime operation

• Acts as Master for ESB bus, interfacing with Slave modules (e.g., EC402)

• Enables high-density I/O expansion within cabinets or across racks

• Maintains deterministic performance required for safety-critical operations

Operational Notes

• Recommended deployment in pairs for redundancy, though simplex operation is possible

• Supports hierarchical node expansion for flexible system architecture

• Designed for electrical ESB bus cabling; fiber optic extensions require SSB401 series

Technical FAQ

What improvements does Style 3 (S3) provide?
S3 includes enhanced internal circuitry, better power efficiency, improved thermal performance, and superior EMI immunity compared to S1 and S2 revisions.

Can it connect via fiber optic cables?
No. The EC401-50 S3 is designed for copper ESB bus connections. Use SSB401 series for fiber optic extensions.

Is it necessary to use the module in pairs?
While simplex operation is possible, dual-redundant deployment is strongly recommended for mission-critical systems to ensure uninterrupted operation.