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Yokogawa ANB10D-425/CU2T ESB Bus Node Unit

Configured for I/O capacity expansion in ProSafe-RS safety systems, the Yokogawa ANB10D-425/CU2T (ANB10D-425/CU2T ESB Bus Node Unit) provides direct physical housing, power distribution, and ESB bus communication interfacing for localized safety I/O modules.

Suffix Breakdown & Model Matrix

  • ANB10D: Base model designation for the ESB Bus Node Unit.

  • 425: Specifies the power supply voltage (24 VDC) and unit configuration.

  • CU2T: Identifies the integrated ESB bus connector unit equipped with the terminal terminator.

Hardware Specifications

Parameter Specification
Model ANB10D-425/CU2T
Brand Yokogawa
Origin Japan
Weight 5.9 kg
Dimensions 482.6 mm x 221.5 mm x 205 mm
Operating Temp -20 deg C to +70 deg C
Power Consumption Max 5.5 A at 24 VDC
I/O Capacity Up to 8 modules per unit
Power Redundancy Dual-redundant power supply
Protection ISA G3 corrosion-resistant

Process Control and DCS Connectivity

The Yokogawa ANB10D-425/CU2T employs a high-speed ESB (Extended Serial Bus) interface to facilitate deterministic communication between the safety control unit and remote I/O racks. The unit utilizes channel-to-channel isolation principles within the backplane architecture to minimize signal crosstalk during high-density I/O operations. The integrated CU2T bus interface provides the necessary termination logic to maintain signal integrity across the bus, effectively mitigating impedance mismatches that lead to data reflection in multi-node configurations. Cold junction compensation (CJC) is managed locally within compatible I/O modules seated in this node unit, ensuring that temperature-sensitive process inputs maintain specified accuracy levels under varying thermal loads.

Frequently Asked Questions

Q: Does the unit support hot-swapping of I/O modules during system runtime?

A: Yes, the ANB10D-425/CU2T architecture supports hot-swapping of individual I/O modules. Ensure that the associated safety logic is transitioned to a maintenance state prior to module extraction to prevent spurious system trips.

Q: What is the primary function of the CU2T termination?

A: The CU2T component provides the required bus termination to prevent signal reflection at the end of the ESB network segment, which is necessary for maintaining valid data framing at high bus communication velocities.

Field Installation Guidelines

  • Mechanical Mounting: Install the unit into a standard 19-inch equipment rack using four M5 screws. Utilize insulation bushes to ensure proper electrical isolation between the chassis and the rack frame to prevent ground loops.

  • Power Wiring: Connect dual-redundant 24 VDC power sources to the designated terminals. Verify that each power feed is individually fused and capable of supporting the maximum 5.5 A draw per unit.

  • Bus Cabling: Route ESB bus cables through dedicated cable trays to maintain physical separation from high-voltage power lines. Ensure cables are secured and that the CU2T terminator is firmly seated to ensure a reliable electrical connection.

  • Environmental Sealing: Given the G3 corrosion-resistant rating, maintain enclosure integrity to prevent the ingress of contaminants. Inspect gaskets periodically to ensure the node unit remains protected against ambient atmospheric corrosives.

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