Yokogawa ANB11D-225/BU2A Dual-Redundant Power Supply Node Units

The Yokogawa ANB11D-225/BU2A, also cataloged as the ANB11D Dual-Redundant Power Supply Node Unit, operates as a dedicated hardware component for 5 km optical repeater extension and ESB bus communication interfacing within CENTUM VP control network platforms.

Suffix Breakdown & Model Matrix

Hardware Specifications

4-20 mA HART Loop Protocol and Fieldbus Connectivity

• Optical Transmission Extension: Extends ESB bus transmission distance up to 5 km using optical fiber while supporting chain and star configurations.
• Channel-to-Channel Isolation: Implements galvanic electrical separation between field termination points and internal backplane logic planes.
• CJC and Signal Conditioning: Incorporates cold junction compensation paths for supported analog input modules handling thermocouple and conventional 4-20 mA loops.
• Redundant Power Execution: Features dual-redundant power configurations operating on 220-240 V AC (50/60 Hz) to maintain continuous operational availability.

Frequently Asked Questions

Q: What is the maximum transmission distance supported by the ANB11D-225/BU2A unit?

A: The unit extends ESB bus transmission distance up to 5 km using optical fiber communication links.

Q: What power supply configuration does the -225 suffix indicate?

A: The -225 suffix designates a dual-redundant power supply configuration operating on 220-240 V AC input.

Field Installation Guidelines

• Mount the unit securely using 19-inch rack mount standards with M5x4 screws, accounting for the total 10 kg system weight including installed I/O modules.
• Ensure the input power source complies with the 220-240 V AC (50/60 Hz) electrical requirement and matches the 230 VA power consumption profile.
• Verify optical fiber connections and routing parameters are maintained within the 5 km transmission threshold to prevent attenuation faults on the extended ESB bus.