ANB11D-615/BU2A | Yokogawa CENTUM VP Fiber Optic ESB Bus Node Unit

Product Overview

The Yokogawa ANB11D-615/BU2A serves as a specialized high-speed communication node for the CENTUM VP Distributed Control System (DCS). This Fiber Optic ESB Bus Node Unit extends the I/O reach of the Field Control Station (FCS) by converting electrical signals into optical pulses. It facilitates remote I/O placement across large industrial sites while maintaining high-speed data integrity. We supply this unit as 100% Brand New and Original, ensuring your control network utilizes factory-certified hardware for maximum uptime.

Part Number Breakdown: ANB11D-615/BU2A

Yokogawa employs a specific suffix logic to define the power and interface requirements for the ANB11D series:

Technical Specifications

The ANB11D-615/BU2A offers high-performance optical conversion for distributed architectures:

• Protocol: ESB (Extension Segment Bus)

• Transmission Speed: Up to 125 Mbps

• Fiber Compatibility: Supports both Single-mode and Multi-mode fiber

• Power Supply: 24 V DC ±10%

• Power Consumption: ~5 W typical

• Operating Temperature: 0°C to 55°C

• Dimensions: 482.6 mm x 221.5 mm x 205 mm

• Weight: ~10 kg

• Status Monitoring: Integrated LED indicators for Power and Communication status

• Mounting: Supports DIN rail or panel mounting configurations

Engineering Advantages

The ANB11D-615/BU2A addresses the unique challenges of modern process plant layouts:

• Complete EMI/RFI Immunity: By utilizing fiber optic transmission, this unit eliminates the risk of electromagnetic interference (EMI) and radio frequency interference (RFI). This ensures stable data flow in environments with high-voltage equipment, variable frequency drives (VFDs), and heavy motor traffic.

• Galvanic Isolation for Remote Sites: The optical interface provides total electrical isolation between the main control room and remote I/O cabinets. This prevents ground loops and protects the Field Control Station from lightning surges or electrical faults originating at remote instrument enclosures.

• Versatile Fiber Integration: The hardware accepts both single-mode and multi-mode fiber. Engineers can utilize existing multi-mode infrastructure for shorter distances or deploy single-mode fiber to bridge vast distances across refineries, offshore platforms, or water treatment networks.

• Low Power Footprint: Drawing only 5 Watts typically, the unit minimizes the thermal load within the control cabinet. This low power consumption allows for higher density installations in compact spaces without compromising the lifespan of adjacent electronic components.

FAQs

• What is the primary difference between the ANB10D and the ANB11D-615/BU2A?

  The ANB10D uses copper ESB bus cables for short-distance local expansion. The ANB11D-615/BU2A utilizes fiber optic cables to facilitate long-distance I/O expansion while providing superior noise immunity and electrical isolation.

• Does this unit support dual-redundant power?

  This specific configuration focuses on 24V DC input. While the internal circuitry is robust, engineers typically implement redundancy at the cabinet power distribution level or by pairing the unit with a redundant DC power supply system.

• How do I monitor the link health?

  The front panel features dedicated LED indicators. These lights provide immediate visual feedback on the power status and the integrity of the ESB bus communication, simplifying troubleshooting during commissioning and routine maintenance.

• Can I install this unit directly on a DIN rail?

  Yes. The ANB11D-615/BU2A supports both DIN rail and panel mounting. This flexibility allows for easy integration into standard 19-inch racks or localized instrument boxes depending on your site's physical constraints.