ANB11D-215/BU2B | Yokogawa | CENTUM VP Optical ESB Bus Node Unit

Product Overview

The Yokogawa ANB11D-215/BU2B acts as a high-performance communication bridge for the CENTUM VP Distributed Control System (DCS). This unit facilitates I/O expansion via an optical ESB bus, allowing engineers to distribute control nodes over distances up to 5 km. By converting electrical signals to optical pulses, the ANB11D-215 provides absolute galvanic isolation and total immunity to electromagnetic interference (EMI). We supply this unit as 100% Brand New and Original, ensuring your remote I/O architecture meets factory-certified performance standards.

Part Number Breakdown: ANB11D-215/BU2B

Yokogawa specifies the hardware configuration through a modular suffix system to match specific site power and distance requirements:

Technical Specifications

The ANB11D-215/BU2B provides the following technical parameters for robust industrial deployment:

• Primary Function: Remote I/O expansion via Optical ESB Bus

• Transmission Distance: Up to 5 km via fiber optic cabling

• Redundancy: Supports dual-redundant power modules and dual-path bus communication

• Input Voltage: 100–120 V AC, 50/60 Hz

• Interface Type: BU2B Connector Unit (Includes built-in terminator)

• Mounting: Standard 19-inch rack mounting

• I/O Compatibility: Interfaces with standard Yokogawa FIO modules

• Weight: ~10 kg (Net)

Engineering Advantages

The ANB11D-215/BU2B solves critical integration challenges in large-scale industrial facilities:

• Total EMI Immunity: Long copper cable runs in refineries or power plants often pick up significant electrical noise. This unit utilizes fiber optics to bypass electromagnetic interference entirely, ensuring clean signal transmission even when cables run near high-voltage motors or variable frequency drives (VFDs).

• Ground Loop Elimination: Fiber optic communication provides 100% electrical isolation between the main control room and remote I/O nodes. This prevents ground potential differences from causing hardware damage or signal drift, a common failure point in sprawling industrial sites.

• Deterministic 5 km Reach: The optimized optical repeater circuitry guarantees high-speed, deterministic data exchange over a 5 km radius. This allows operators to place I/O cabinets closer to the field instruments, significantly reducing the cost of analog and digital field wiring.

• Redundant Power Stability: The dual-redundant power supply configuration ensures the node stays online during a power module failure. The system draws current from two separate sources, allowing for online replacement of a faulty module without interrupting the process.

FAQs

• Does the /BU2B option require an external terminator?

  No. The /BU2B connector unit includes an integrated terminator. Use this specific option code for nodes located at the end of an ESB bus chain to prevent signal reflection and ensure bus stability.

• Can I use this unit for distances greater than 5 km?

  This specific configuration (Suffix -2) targets the 5 km range. For distances up to 50 km, Yokogawa offers different configurations. Please verify your fiber optic link budget and attenuation requirements before installation.

• Is the ANB11D-215 compatible with 220V AC?

  No. Suffix "1" designates a 100–120 V AC input. If your site utilizes 220–240 V AC, you must specify the ANB11D-225 model to prevent hardware damage.

• What maintenance does the optical interface require?

  The optical repeater is solid-state and requires no calibration. However, we recommend inspecting the fiber optic connectors for dust or contamination during routine maintenance to prevent signal attenuation.