Product Description

The EC401-10 S2 (Part Number: EC401-10) is a high-speed communication interface module used within the Yokogawa CENTUM Distributed Control System (DCS). It functions as the master-side ESB (Extended Serial Bus) coupler, enabling reliable, low-latency data exchange between the Field Control Unit (FCU) and remote I/O node units.

Although early references mention Allen-Bradley compatibility, the EC401-10 S2 is a proprietary Yokogawa component designed exclusively for CENTUM CS 1000, CS 3000, and CENTUM VP systems. Its primary role is to extend the I/O bus over short distances, ensuring deterministic communication and synchronized control for mission-critical industrial processes.

Technical Specifications

Application Scenarios

The EC401-10 S2 is essential in distributed I/O architectures where remote node expansion is required without compromising system performance or availability.

Typical applications include:

• Installation in AFV10, AFV30, or AFV40 Field Control Units

• Communication management for ANB10 and ANB11 Node Units

• Expansion of ESB-based remote I/O networks

Industries served:

• Oil & gas refineries

• Chemical and petrochemical processing plants

• Power generation facilities

Its deterministic communication behavior makes it well-suited for high-availability and safety-critical DCS environments.

Frequently Asked Questions (FAQ)

Q: What is the difference between EC401 and EC402?
A: The EC401-10 S2 is the master-side ESB coupler installed in the Control Unit (FCU). The EC402 is the slave-side module installed in the Node Unit.

Q: Is the EC401-10 S2 hot-swappable?
A: In a redundant configuration, the module can be replaced without shutting down the entire control system, provided the secondary EC401 module remains operational.