Product Description

The ANT401-5E/A2EE2AT is a high-performance Master Repeater Module designed to extend the reach of the ESB (Enhanced Service Bus) within the Yokogawa Electric Corporation control system architecture.

By converting electrical ESB signals into optical signals, this module enables long-distance communication—up to 5 km using single-mode fiber—between a Field Control Unit (FCU) and remote I/O nodes. It is engineered for seamless integration with both CENTUM VP and ProSafe-RS platforms, ensuring high-speed and high-integrity data transmission across expansive industrial facilities.

The “5E” variant is optimized for single-mode fiber applications and supports flexible network topologies, including star, chain (daisy-chain), or hybrid configurations. This design provides maximum layout flexibility for complex plant infrastructures.

Detailed Technical Specifications

Operational Applications

The ANT401-5E/A2EE2AT is widely deployed in large-scale and geographically distributed industrial environments, including:

• Offshore Platforms: Connecting subsea wellhead or remote I/O panels to centralized control rooms

• Oil Refineries & Petrochemical Plants: Linking multiple process units across wide facility footprints

• Water & Wastewater Treatment Plants: Bridging communication between remote pump stations and main DCS cabinets

• Hazardous Areas: Utilizing fiber optics to eliminate electromagnetic interference and provide intrinsic electrical isolation

By using optical transmission, the module significantly improves noise immunity and system reliability in electrically harsh environments.

FAQ

What is the difference between a Master (ANT401) and a Slave (ANT502) module?
The ANT401-5E/A2EE2AT (Master) is installed on the controller or upstream side to initiate and manage the optical ESB link. The ANT502 (Slave) is installed at the remote I/O node, where it receives the optical signal and converts it back into electrical ESB communication.

Can I mix star and chain topologies with this module?
Yes. The ANT401-5E/A2EE2AT supports hybrid configurations, allowing both star and chain segments within the same network to optimize fiber routing based on plant layout.

Is the HKU interface mandatory?
No. The HKU interface is optional; however, it is strongly recommended for monitoring cabinet temperature, fan status, and environmental conditions—especially in remote or unmanned installations.