Yokogawa ANT401-50/CU1N Optical ESB Bus Repeater Master Module

The Yokogawa ANT401-50/CU1N Optical ESB Bus Repeater Master Module is a high-performance optical communication module engineered for large-scale distributed control systems (DCS). As the master unit in an ESB (Enhanced System Bus) optical repeater network, it enables long-distance, high-speed, and deterministic data communication between the central control system and remote field nodes.

This module leverages fiber-optic technology to eliminate electromagnetic interference, ensure signal integrity, and extend the communication range across industrial plants. The ANT401-50/CU1N is widely deployed in mission-critical applications where high reliability, system scalability, and redundancy are essential. Its rugged construction, integrated diagnostics, and flexible mounting options make it suitable for industries such as oil & gas, power generation, petrochemical processing, and automated manufacturing systems.

Product Specifications

Product Applications

The ANT401-50/CU1N module is ideal for industrial systems requiring reliable, interference-free, long-distance communication. Key applications include:

• Power Generation: Maintaining deterministic communication between central control systems and remote turbine or generator nodes.

• Oil & Gas Facilities: High-reliability communication for offshore platforms, refineries, and pipeline monitoring.

• Petrochemical Plants: Enables real-time data acquisition in harsh environments with strong EMI interference.

• Pharmaceutical & Food Processing: Ensures accurate and compliant data exchange for automated batch processes.

• Large Manufacturing Plants: Facilitates integration of distributed control and automation systems across extensive facility areas.

Product Advantages

• High-Speed Optical Transmission: Provides fast, deterministic communication over long distances.

• EMI Immunity: Optical fiber completely eliminates electrical interference.

• Redundant Network Support: Dual paths ensure continuous operation even in the event of link failure.

• Extended Communication Range: Capable of transmitting data over several kilometers without signal loss.

• Rugged Industrial Design: Compact and durable for installation in harsh plant environments.

• Integrated Diagnostics: LED indicators and built-in monitoring simplify troubleshooting and maintenance.

FAQ

1. Which types of fiber can be used with the ANT401-50/CU1N?

   Single-mode and multimode fibers are supported depending on required transmission distance.

2. Does this module support redundant communication paths?

   Yes, it provides dual redundant optical paths for high system availability.

3. What is the maximum distance for optical data transmission?

   Up to 15 km with single-mode fiber, depending on the network configuration.

4. How many nodes can be connected via this master module?

   Typically supports up to 64 nodes in a single ESB network segment.

5. Can it be integrated with Yokogawa CENTUM VP systems?

   Yes, full compatibility with CENTUM VP and other Yokogawa DCS systems is provided.

6. What diagnostics and monitoring features are available?

   LED indicators, self-check functions, and alarm outputs for link integrity.

7. Is hot-swapping supported for this module?

   Yes, the module can be replaced without shutting down the entire system if configured properly.

8. What error-handling mechanisms are implemented?

   CRC-based error detection and automatic retransmission ensure data integrity.

9. What is the nominal power requirement for operation?

   24 V DC (±10%), with power consumption approximately 10 W.

10. How does the module synchronize multiple nodes?

    Time-synchronized data exchange ensures deterministic communication across the ESB network.