Description

Yokogawa ANB10D-420/CU2N ESB Bus Node Unit

Configured for ESB bus interfacing in the CENTUM DCS FIO architecture, the Yokogawa ANB10D-420/CU2N, also cataloged as the ANB10D Node Unit, provides direct physical connection between field I/O modules and the Field Control Unit via dual-redundant ESB communication links.

Suffix Breakdown & Model Matrix

Code Segment	Definition
ANB10D	Node Unit for Dual-Redundant ESB Bus
-4	Dual-redundant power supply configuration
2	220–240 V AC input power
0	Standard model without explosion protection
/CU2N	ESB Bus Connector Unit (no built-in termination resistors)

Hardware Specifications

Parameter	Specification
Model Brand	Yokogawa ANB10D-420/CU2N
Origin	Japan
Weight	Approx. 10 kg (with 8 loaded I/O modules)
Dimensions	483 mm x 221 mm x 214 mm
Operating Temp	0 to 60 degC (0 to 50 degC with certain comm modules)
Power Consumption	230 VA / 120 W
Input Voltage	220 to 240 V AC (range 187 to 264 V AC)
Frequency	50 / 60 Hz (range 47 to 63 Hz)
Humidity Range	5% to 95% RH (non-condensing)
Altitude Limit	≤ 2000 m
Dust Concentration	≤ 0.3 mg/m³

FOUNDATION Fieldbus Connectivity & Channel Isolation

The ANB10D-420/CU2N supports deterministic ESB bus communication without introducing additional protocol conversion latency. In multi-module configurations, channel-to-channel isolation minimizes crosstalk between I/O cards. When integrated with Foundation Fieldbus H1 segments, the node maintains cyclic data update timing aligned to CENTUM VP scheduling constraints, ensuring consistent process variable acquisition and output actuation across redundant control paths.

Frequently Asked Questions

Q: Does the ANB10D-420/CU2N support hot-swapping of I/O modules?

A: Hot-swapping is permitted only under controlled conditions where the node remains powered and redundant paths are active; power supply modules must not be removed during operation.

Q: What is the switching behavior during loss of one power supply?

A: The remaining active supply assumes full load without interruption; no reconfiguration or manual intervention is required.

Q: Are external termination resistors required with /CU2N option?

A: Yes. The /CU2N connector unit does not include internal termination resistors; proper bus termination must be installed at both physical ends of the ESB segment.

Field Installation Guidelines

Mount the unit in a standard 19-inch rack using four M5 screws. Ensure rack grounding is bonded to the facility earth grid before connecting AC power. Route ESB bus cables separately from high-voltage wiring to prevent electromagnetic interference. Maintain minimum bend radius for all shielded twisted-pair cabling. Verify dust concentration and humidity levels meet specification prior to energizing the node. Confirm that both power supplies are phased identically when connecting to AC mains.

Specifications

• Brand: Yokogawa

Advantages

• High reliability in industrial environments
• Supports continuous operation
• Compatible with major PLC/DCS systems