Yokogawa ANB10D-420/CU2N/NDEL ESB Bus Node Unit

Configured for high-speed I/O integration in CENTUM distributed control systems, the Yokogawa ANB10D-420/CU2N/NDEL (ANB10D) Node Unit provides direct physical/electrical execution of ESB bus data transmission, dual-redundant power management, and node expansion licensing.

Suffix Breakdown & Model Matrix

Hardware Specifications

Yokogawa DCS Process Control Characteristics

• 4-20 mA HART loop protocol: The ANB10D serves as the interface node for field control stations that manage HART-enabled instrumentation. This connectivity is mandatory to ensure transparent passthrough of HART diagnostic data from field devices to the DCS engineering station.
• FOUNDATION Fieldbus / Profibus PA connectivity: The node unit acts as the primary backplane interface for fieldbus-connected subsystems. This connectivity is mandatory to provide the deterministic bandwidth required for fieldbus segment communication within the CENTUM architecture.
• Channel-to-channel isolation: The internal circuitry incorporates galvanic isolation between the ESB bus transceiver and the node power supply. This is mandatory to prevent ground potential differences between remote racks from inducing common-mode noise into the communication backbone.
• Cold junction compensation (CJC): The node unit maintains precise thermal management for the internal bus controllers, which is mandatory to prevent clock drift and timing errors that could otherwise result in ESB bus communication timeouts.

Frequently Asked Questions

Q: Can the ANB10D dual-redundant power supplies be replaced while the system is online?

A: Yes. The -4 dual-redundant power supply configuration allows for hot-swapping a single power supply module while the node remains powered by the secondary source. Isolation of the specific supply being replaced is mandatory prior to removal.

Q: What is the purpose of the /NDEL software license?

A: The /NDEL option code signifies an integrated software license for node expansion. This is mandatory to unlock the register capacity required for managing additional I/O modules connected through the ESB bus interface.

Field Installation Guidelines

• Mounting: Install the unit in a standard 19-inch rack using the M5 x 4 mounting hardware. The use of the included insulation bush is mandatory to isolate the node chassis from the rack frame and prevent undesirable ground loops.
• Grounding: Terminate the node chassis to the cabinet’s central safety earth bus. A low-impedance connection is mandatory to provide an effective path for transient suppression and to maintain the integrity of the high-speed ESB communication bus.
• Wiring: Connect the ESB bus cables via the /CU2N connector unit. Ensure all signal cabling is routed in dedicated, shielded raceways at least 150 mm away from high-power AC lines to prevent inductive noise injection, which is critical for deterministic bus operation.