Detailed Parameter Table
Product Introduction
The YOKOGAWA ANT502-50/BU1B is a specialized Optical ESB Bus Repeater Slave Module, an integral component of Yokogawa’s CENTUM VP distributed control system (DCS). This module is designed to extend the reach of the ESB (Ethernet Serial Bus) communication network by converting the electrical bus signal into a reliable optical signal for long-distance transmission. As a slave module, the YOKOGAWA ANT502-50/BU1B works in conjunction with a corresponding master module, such as the ANT401, to establish a secure and high-speed optical link. Its primary function is to serve as a node within the ESB network, allowing field control units (FCUs) to communicate with remote I/O units, such as the ANB11 Optical ESB Bus Node Unit or the ANT10U Unit for Optical ESB Bus Repeater Module, over distances up to 5 km. The “BU1B” option code specifically indicates a connector unit without an ESB Bus connector, which is crucial for certain installation types where the module is not used for branching the bus.
The YOKOGAWA ANT502-50/BU1B module plays a critical role in expanding the physical architecture of a CENTUM VP system. By leveraging fiber optic technology, it bypasses the distance limitations of standard copper wiring, enabling a more decentralized and flexible system layout. This capability is essential for large-scale industrial plants, geographically dispersed facilities, and applications where the control room is located far from the field I/O devices. The YOKOGAWA ANT502-50/BU1B ensures that data transmission remains fast, stable, and immune to electromagnetic interference, a key requirement for mission-critical automation and control processes.
Core Advantages and Technical Highlights
The YOKOGAWA ANT502-50/BU1B stands as a testament to Yokogawa’s commitment to building highly reliable and scalable industrial control systems. Its design and functionality are specifically tailored to overcome the challenges of long-distance communication in harsh industrial environments.
Robust Communication and Extended Reach: The primary strength of the YOKOGAWA ANT502-50/BU1B is its ability to extend the ESB bus network up to 5 km using single-mode optical fiber. This extended reach is crucial for large-scale facilities, such as petrochemical plants or power generation stations, where control units and field devices are located significant distances apart. The optical signal conversion provides superior immunity to electromagnetic interference (EMI) and radio frequency interference (RFI), ensuring a clean, stable, and uninterrupted data flow, which is paramount for the integrity of control signals.
High Reliability and Redundancy Support: The YOKOGAWA ANT502-50/BU1B is designed to support dual-redundant configurations. In this setup, a pair of modules is installed in continuous slots, providing a fail-safe mechanism that ensures continuous operation even if one module fails. This redundancy is a critical feature for applications where process downtime is unacceptable. The robust construction and low current consumption (0.5 A) of the YOKOGAWA ANT502-50/BU1B further contribute to its long-term reliability and operational stability.
Flexible System Architecture: This module facilitates both chain and star connection topologies, offering system designers the flexibility to create an optimal network layout that suits the specific needs of their application. Whether connecting a series of remote I/O nodes in a long chain or creating a star-like network from a central hub, the YOKOGAWA ANT502-50/BU1B provides the necessary building block. The “BU1B” option, which indicates no ESB Bus connector, offers a streamlined design for installations where the module acts solely as an end point in a connection, simplifying wiring and reducing potential points of failure.
Typical Application Scenarios
The YOKOGAWA ANT502-50/BU1B is indispensable in a wide range of industrial applications that rely on the robust and scalable architecture of the Yokogawa CENTUM VP DCS. In the oil and gas industry, this module is deployed to connect remote wellhead platforms or processing stations to a centralized control room, allowing for real-time monitoring and control of operations over long distances. In large-scale power plants, the YOKOGAWA ANT502-50/BU1B is used to link control units with field I/O located in distant boiler houses, turbine halls, or switchyards, ensuring synchronized and reliable control of the entire facility.
In the chemical and pharmaceutical sectors, the YOKOGAWA ANT502-50/BU1B facilitates the expansion of control systems to cover vast production sites, including hazardous and explosion-prone areas. Its optical communication eliminates the risk of sparking and provides a secure data link in these sensitive environments. Furthermore, in water treatment and infrastructure projects, the module is vital for connecting a central control station to geographically dispersed pump stations, sensor networks, and valve controls, enabling efficient management of water distribution and quality across a municipality. The YOKOGAWA ANT502-50/BU1B‘s role is to ensure that a seamless and reliable communication backbone is in place, regardless of the physical distance or environmental challenges of the site, allowing for centralized control and management of complex and critical processes.
Related Model Recommendations
- ANT401: The Optical ESB Bus Repeater Master Module for 5 km, which pairs with the YOKOGAWA ANT502-50/BU1B to form an optical link.
- ANT512: An Optical ESB Bus Repeater Slave Module for 5 km to 50 km, offering extended transmission distance for even larger sites.
- ANB11S: An Optical ESB Bus Node Unit, which is a key chassis where the YOKOGAWA ANT502-50/BU1B is typically installed.
- ANT10U: A Unit for Optical ESB Bus Repeater Module, another compatible installation unit for the YOKOGAWA ANT502-50/BU1B.
- EC401: The ESB Bus Coupler Module, which is installed in the Field Control Unit (FCU) to connect to the ESB bus network.
Installation, Commissioning and Maintenance Instructions
Installation preparation: Prior to installing the YOKOGAWA ANT502-50/BU1B, ensure that the system’s power supply is completely disconnected to prevent electrical shock and equipment damage. Verify that the module is installed in a compatible unit, such as the ANB11□ or ANT10U, and that the slot assignment is correct for the intended configuration (single or dual-redundant). All necessary optical fiber cables and termination tools should be prepared. Since the YOKOGAWA ANT502-50/BU1B‘s /BU1B option does not have an ESB bus connector, ensure that the connection is made correctly to the adjacent modules via the optical link.
Maintenance suggestions: The YOKOGAWA ANT502-50/BU1B is designed for high reliability with minimal maintenance requirements. Routine maintenance primarily involves visual inspections of the module’s status indicators to confirm proper operation. Check the optical fiber connections for any signs of damage, dirt, or improper bends, as these can significantly impact communication quality. Clean the optical connectors with a suitable lint-free wipe and cleaning fluid as needed to maintain optimal signal integrity. For troubleshooting, refer to the module’s status LEDs and the CENTUM VP system diagnostics to identify and address any communication errors. If the YOKOGAWA ANT502-50/BU1B module requires replacement, ensure that the system is properly powered down and follow the manufacturer’s specific removal and installation procedures to avoid damage to the backplane or adjacent modules.
Service and Guarantee Commitment
Yokogawa’s dedication to quality is evident in the robust design and comprehensive support for the YOKOGAWA ANT502-50/BU1B Optical ESB Bus Repeater Slave Module. The module comes with a standard warranty, providing assurance against manufacturing defects. Beyond the warranty, Yokogawa offers a full suite of after-sales services, including technical support from a global network of experts. Our team provides assistance with installation, commissioning, and troubleshooting to ensure the seamless integration and long-term performance of your YOKOGAWA ANT502-50/BU1B. We are committed to providing reliable, professional service and technical expertise to help you maximize the value and efficiency of your automation systems. Our support ensures that your investment in the YOKOGAWA ANT502-50/BU1B is protected, giving you confidence in the stability and continuity of your critical operations.
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