Product Overview

The Yokogawa ANT502-5E is a high-performance Optical Fiber Performance Expansion Unit (also known as an Optical Fiber Bus Repeater) designed to extend the communication distance between the Field Control Station (FCS) and the Remote I/O Node Units in the Yokogawa CENTUM VP Distributed Control System (DCS). It is used in applications where the distance between I/O nodes exceeds the limits of conventional copper wiring (ESB cables). The ANT502 acts as a slave-side repeater, receiving optical signals from a master-side module (typically the ANT401) and converting them into electrical signals for the local I/O rack.

The -5E suffix indicates a specific hardware revision, featuring dual-redundant optical ports and standard environmental protection, ensuring reliability and continuous communication in large-scale industrial plants.

Key Features

• Model: Yokogawa ANT502-5E

• Type: Optical Fiber Performance Expansion Unit, Slave-Side Repeater

• Compatibility: Designed for Yokogawa CENTUM VP and CENTUM CS 3000

• Redundancy: Dual-redundant configuration for high availability, offering bumpless switchover in case of a failure

• Distance Extension: Extends communication up to 2 km (1.24 miles) between master (ANT401) and slave (ANT502)

• Signal Conversion: Converts optical fiber signals to electrical signals for local I/O racks

Technical Specifications

Key Benefits

• Long-Distance Integration: Enables remote I/O racks to be placed in satellite instrument houses (SIH) or other distant locations, maintaining high-speed communication and control between distributed nodes.

• Electrical Isolation: Optical fiber provides complete galvanic isolation, preventing the DCS from being affected by lightning strikes, ground potential differences, and other electrical interferences that can occur between buildings.

• High Availability: With dual-redundant optical ports, the ANT502 ensures continuous communication. If one fiber optic link fails (e.g., due to a cable cut), the system automatically switches to the secondary path, preventing downtime.

• Real-Time Diagnostics: Front-panel LED indicators display real-time status:

• STATUS: Indicates overall health of the module.

• SND/RCV: Displays activity on the optical communication link (Transmit/Receive).

• SYNC: Displays synchronization status with the master module (ANT401).

Physical & Environmental Specifications