Product Overview

The Yokogawa ANT401-5E/A2EE2AT is a high-performance Master Module designed for the Optical ESB Bus Repeater system. This essential networking component facilitates the conversion of standard electrical ESB bus signals into optical signals, allowing for significant expansion of control network topologies. By utilizing single-mode fiber optic cabling, the module extends the communication reach of a Field Control Station (FCS) up to a maximum distance of 5 kilometers. It is engineered to maintain high-speed data synchronization between the main controller and remote I/O nodes, ensuring the responsiveness and reliability of the CENTUM VP architecture across large-scale industrial sites.

Hardware Configuration and Technical Parameters

The ANT401-5E/A2EE2AT is built for high-availability environments and supports various mounting and redundancy options.

• Communication Interface: LC-type optical connectors (IEC61754-20 compliant)

• Optical Medium: Single-mode quartz fiber (9.3/125 μm)

• Max Range: 5 km total transmission distance

• Wavelength: 1.3 μm with a permissible loss range of 0 to 10 dB

• Topology Support: Configurable for Star or Chain network layouts

• Cascading Capacity: Maximum of 2 stages in chain configurations

• Power Profile: 0.5 A current consumption

• Chassis Weight: 0.25 kg (Main body); 0.30 kg (Gross shipping weight)

• Physical Dimensions: 130 mm x 130 mm x 32 mm

• Compatible Units: AFV30S/D, AFV40S/D, ANB10S/D, ANB11S/D, and ANT10U

Strategic Industrial Deployment

The ANT401-5E/A2EE2AT is typically deployed in centralized control architectures where field equipment is distributed over a wide geographic area.

• Petrochemical and Refining: Connecting remote I/O substations located at tank farms or loading docks to the central control room without the limitations of copper cabling.

• Large-Scale Utilities: Implementing long-distance bus communication in water treatment or power plants where electromagnetic interference (EMI) makes fiber optics the preferred medium.

• Redundant Network Backbone: Establishing dual-redundant optical paths in critical safety systems to prevent total communication loss during a cable strike or hardware failure.

• Environmental Management: Utilizing the HKU interface option to monitor temperature and power status within remote cabinets directly through the bus repeater link.

FAQ

Q: What is the primary role of the "Master" module in an optical ESB link?

A: The Master module, such as the ANT401, is installed at the upstream side (closer to the FCS) to initiate the optical link. It must be paired with an Optical ESB Bus Repeater Slave Module (like the ANT502) at the remote node side.

Q: Can I use multimode fiber with this specific module?

A: No, the ANT401-5E is specifically designed for single-mode quartz optical fiber. Using multimode fiber will result in excessive signal loss and potentially prevent the link from establishing.

Q: Is it possible to install two ANT401 modules for redundancy?

A: Yes, the module supports dual-redundant configurations. In this setup, two modules are installed in the designated I/O slots of an AFV or ANB unit to ensure continuous communication if one module or fiber path fails.

Q: What do the /CU1N and /CU1T option codes signify?

A: These codes refer to the connector units required for the ESB bus. /CU1N is a standard connector unit, while /CU1T includes a built-in terminator, which is necessary if the module is at the end of the physical ESB bus segment.

Q: How many remote nodes can be connected via a single ANT401 master?

A: A single master module can support up to 8 connections across a combination of chain and star topologies, depending on the system's total node count and software licensing.