ANB10D-445 Yokogawa ESB Bus Node Unit

The Yokogawa ANB10D-445/CU2T/NDEL, also cataloged as the ANB10D-445 ESB Bus Node Unit, operates as a dedicated hardware component for field I/O processing and communication expansion within CENTUM VP control system platforms.

Suffix Breakdown & Model Matrix

Hardware Specifications

Process Control and DCS Characteristics

• 4-20 mA HART loop protocol: The node unit maintains high-fidelity signal paths for HART-enabled I/O modules, supporting transparent transmission of device-level diagnostics to the DCS asset management station.
• FOUNDATION Fieldbus / Profibus PA connectivity: The unit acts as a gateway for digital fieldbus data, ensuring deterministic delivery of process variables and status information over the ESB bus architecture.
• Channel-to-channel isolation: Electrical isolation is maintained between the ESB bus interface and field-side I/O modules, preventing ground loops and transient interference from affecting the integrity of the process control loop.
• Cold junction compensation (CJC): The node unit supports terminal boards equipped with thermal reference sensors, facilitating accurate CJC calculations for thermocouple inputs at the field connection point.

Frequently Asked Questions

Q: Does the ANB10D-445 support hot-swapping of the power supply modules?

A: Yes. The unit is designed with dual-redundant power supplies that allow for hot-swapping of modules during normal operation without causing an I/O link failure or node communication interruption.

Q: What is the purpose of the NDEL option code?

A: The NDEL code indicates the inclusion of the required software license for Node Expansion, which must be activated within the system database to permit the inclusion of this node in the control configuration.

Field Installation Guidelines

• Mounting: Install the node unit in a clean, vibration-free rack enclosure. Ensure the unit is secured to the mounting rails at all designated points to prevent mechanical stress on the ESB bus connectors.
• Grounding: Connect the chassis ground terminal to the main cabinet protective earth (PE) bus using a copper conductor of at least 2 mm squared. A low-impedance ground is necessary to satisfy EMC requirements for high-speed bus communication.
• Wiring: Route ESB bus cables through shielded conduits separated from high-voltage AC lines. Ensure that the terminator (S9564FA) is correctly installed at the final node in the bus segment to prevent signal reflections and packet loss.