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Yokogawa ANB10D-125/CU2T ESB Bus Node Unit

Configured for deterministic data exchange in CENTUM VP systems, the Yokogawa ANB10D-125/CU2T (ANB10D ESB Bus Node Unit) provides direct physical backplane execution for eight Field Input/Output modules. It terminates dual-redundant ESB bus loops via integrated CU2T connector units, delivering regulated 24 VDC power to field transmitters and executing real-time signal conversion between the Field Control Unit and peripheral hardware.

Suffix Breakdown & Model Matrix

Code	Definition
ANB10D	Node Unit for Dual-Redundant ESB Bus (FIO compatible)
-1	100 - 120 V AC Power Supply
2	Dual-Redundant Power Supply Configuration
5	Basic Type (No Explosion Protection)
/CU2T	Connector Unit with Terminator (S9564FA x 2)

Hardware Specifications

Parameter	Specification
Model Brand	Yokogawa ANB10D-125/CU2T
Origin	Japan
Weight	Approx. 10 kg (with 8 populated I/O modules)
Dimensions	19-inch Rack Mount (Standard EIA)
Operating Temp	0 degC to 60 degC
Power Consumption	200 VA / 120 W
Input Voltage	100 to 120 V AC (90 to 132 V AC range)
Frequency	50/60 Hz (± 3 Hz)
I/O Capacity	Up to 8 FIO Modules
Humidity	5% to 95% RH (Non-condensing)

4-20 mA HART Loop Protocol Compatibility

The ANB10D-125/CU2T supports standard 4-20 mA analog input and output FIO modules operating on the HART protocol. The node unit's backplane supplies stable current sourcing to ensure loop integrity during digital communication handshakes. Channel-to-channel isolation within the populated FIO cards prevents ground loop formation when interfacing with HART multiplexers. The ESB bus maintains deterministic polling cycles required for HART variable readback without compromising the primary control scan time.

Frequently Asked Questions

Q: What is the hot-swap limitation for replacing a single power supply module in the -125 configuration?

A: The ANB10D-125 features dual-redundant power modules. One PW481 module can be removed and replaced while the second module maintains full operational voltage to the backplane and FIO cards. Ensure the replacement module matches the 100-120 V AC rating before insertion.

Q: Does the /CU2T option require external termination resistors?

A: No. The /CU2T designation includes two pre-installed connector units (S9564FA) that contain internal bus terminators. Do not install additional resistors on the ESB bus trunk when using this configuration.

Q: What is the maximum backplane current load supported per I/O slot?

A: Each FIO slot receives regulated 24 VDC from the node unit. The total current consumption must not exceed the power supply capacity of 120 W. Refer to individual FIO module datasheets for specific draw calculations to prevent overload.

Field Installation Guidelines

Mount the ANB10D-125/CU2T in a standard 19-inch rack using M5 screws. Torque terminal connections to the M4 power terminals according to the torque specifications provided in the CENTUM VP installation manual. Ensure the ESB bus cable shield is grounded at a single point to the rack chassis to prevent noise ingress. Maintain a minimum bend radius of 10 times the cable diameter for all ESB bus coaxial cables. Verify that the ambient temperature change rate does not exceed ± 10 degC/hour to avoid thermal stress on the backplane connectors.

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