Product Description

The EC402-50 (Part Number: EC402-50) is a slave-side communication interface module used in Yokogawa CENTUM VP and CENTUM CS 3000 Distributed Control Systems (DCS). Installed within a local node unit, it operates as the Extended Serial Bus (ESB) receiver, enabling deterministic, high-speed data exchange between the Field Control Unit (FCU) and distributed I/O modules.

Designed for continuous operation in mission-critical environments, the EC402-50 receives ESB signals from the master-side coupler (EC401) and distributes them across the node unit’s internal backplane. This architecture ensures synchronized process data handling and reliable I/O scanning for real-time control applications.

Technical Specifications

Performance & Integration

The EC402-50 is optimized for low-latency I/O scanning, making it ideal for fast control loops and time-sensitive process operations. Unlike Ethernet-based communication modules, the ESB protocol provides a deterministic, non-collision data path, ensuring predictable response times.

Its compact design and efficient power usage make it well-suited for high-density node configurations, where space, thermal stability, and communication reliability are critical.

Application Scenarios

• Remote I/O expansion in CENTUM VP and CENTUM CS 3000 systems

• Installation in ANB10 and ANB11 Node Units

• Deterministic communication for process-critical I/O signals

Common industries:

• Oil & gas

• Chemical and petrochemical processing

• Power generation and utilities