EC401-50 S3 ESB Communication Module | Yokogawa

Product Description

Product Overview

YOKOGAWA EC401-50 S3 is an ESB Bus Coupler Module designed for Yokogawa CENTUM VP Distributed Control Systems. The module functions as an ER bus interface within ESB bus architectures, enabling reliable communication between local ESB bus nodes, Compact Field Control Units (FCUs), and remote ER bus segments.

Installed inside ESB Bus Node Units or Compact FCUs, this module provides stable, deterministic data exchange for distributed control environments where communication reliability and expandability are critical.

Functional Description

The EC401-50 S3 operates as a communication interface module that links ESB-based control components to ER bus networks. It enables structured data transfer between local controllers and remote nodes while supporting redundant configurations for high-availability system designs.

When two modules are installed, the system supports dual-redundant ER bus communication, improving fault tolerance and maintaining continuous operation during module or network failures.

Technical Specifications

Communication Characteristics

• Communication Protocol: ER bus

• Physical Layer: IEEE 802.3 10BASE-2

• Transmission Medium: Coaxial cable

• Connector Type: BNC

• Communication Speed: 10 Mbps

• Maximum Transmission Distance: Up to 500 m per segment

System Compatibility

• CENTUM VP Distributed Control System

• ESB Bus Node Units: ANB10S, ANB10D

• Compact FCUs: AFF50S, AFF50D, AFV10S, AFV10D

Electrical Characteristics

• Power Supply: Provided by host ESB Bus Node Unit or Compact FCU

• Power Consumption: Low-power design optimized for continuous operation

Mechanical Specifications

• Dimensions: 22 × 124 × 126 mm

• Weight: 0.1–0.3 kg (installation dependent)

• Installation Method: Plug-in module for ESB nodes and Compact FCUs

Environmental Conditions

• Operating Temperature: 0 °C to +55 °C

• Storage Temperature: -20 °C to +70 °C

• Relative Humidity: 10% to 90% RH, non-condensing