Yokogawa ANB11D-215/BU2B CENTUM VP series Node Units

Configured for distributed control network expansion in CENTUM VP platforms, the Yokogawa ANB11D-215/BU2B (ANB11D-215/BU2B Node Unit) provides direct physical/electrical execution.

Suffix Breakdown & Model Matrix

• ANB11D: Base platform designating the node unit with an optical repeater for ESB bus extension.
• -215: Hardware configuration indicator denoting dual-redundant power supplies rated for 220-240 V AC and basic non-explosion protected compliance.
• /BU2B: Connector assembly option featuring an integrated ESB bus terminator for end-of-line optical node deployment.

Hardware Specifications

4-20 mA HART Loop Protocol and Channel-to-Channel Isolation

The internal signal processing architecture provides rigorous channel-to-channel isolation across connected analog modules, protecting sensitive measurement circuits from common-mode voltage spikes and ground loops. Communication subsystems handle standard 4-20 mA HART loop protocols natively, ensuring uninterrupted diagnostic data overlay and precise process variable scaling without introducing conversion latency or signal attenuation across extended control loops.

Frequently Asked Questions

Q: How does the optical repeater integration maintain signal integrity over the 5 km fiber optic span?

A: The onboard optical transceiver converts electrical backplane signals into optical pulses optimized for multi-mode or single-mode fiber links, preventing electromagnetic interference and signal degradation across geographically dispersed installations.

Q: How does the dual-redundant power supply architecture handle active-active switchover during input voltage loss?

A: The dual 220-240 V AC power modules operate in a balanced load-sharing configuration; if one power rail experiences voltage drop or total failure, the redundant module instantly assumes full load demand without causing a reset or communication interruption on the optical backplane bus.

Field Installation Guidelines

• Rack Mounting: Secure the 19-inch rack-mount chassis into the cabinet profile using all designated mounting points to withstand mechanical vibrations and prevent structural misalignment.
• Shielded Cabling: Route all electrical control and communication cables through dedicated metallic wireways, ensuring that cable shields are properly grounded to the enclosure bus bar to suppress electromagnetic interference.
• Thermal Management: Maintain a clear vertical airflow path above and below the 10 kg unit enclosure to allow natural convection cooling within the specified 0 to 55 deg C operating temperature window.