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Description
Yokogawa ANB10D-125/CU2N ESB Bus Node Unit
The Yokogawa ANB10D-125/CU2N, also cataloged as the ANB10D Node Unit, operates as a dedicated hardware component for distributed I/O expansion within CENTUM VP and CENTUM CS 3000 DCS platforms. It interfaces field devices to the Field Control Station via redundant ESB bus links, enabling deterministic signal acquisition and control execution.
Suffix Breakdown & Model Matrix
Code Segment
Position
Definition
ANB10D
Model
ESB Bus Node Unit with dual-redundant communication
-1
Suffix
Single ESB Bus interface configuration
2
Suffix
Dual-redundant power supply
5
Suffix
220 - 240 V AC input power
/CU2N
Option
ISA G3 conformal coating, non-explosion protected
Hardware Specifications
Parameter
Specification
Model Brand
Yokogawa ANB10D-125/CU2N
Origin
Japan
Weight
5.5 to 6.0 kg (without I/O modules)
Dimensions
482.6 mm width (19-inch rack), depth and height per Yokogawa mechanical outline
Operating Temp
0 to 50 degC
Power Consumption
Max. 100 VA (dependent on installed I/O modules)
Supply Voltage
220 to 240 V AC, 50/60 Hz ±3 Hz
Communication Interface
Dual-redundant ESB bus
I/O Capacity
8 I/O module slots plus dedicated PSU and interface slots
Mounting
19-inch rack mount
Process Control Signal Handling
The ANB10D supports 4-20 mA HART loop protocol integration through compatible analog I/O modules, enabling bidirectional digital data overlay on standard current loops. Channel-to-channel isolation limits inter-module crosstalk during high-density signal routing. Cold junction compensation is executed locally within thermocouple input modules interfaced to this node.
Frequently Asked Questions
Q: Can I/O modules be replaced without shutting down the DCS?
A: Yes. The ANB10D supports hot-swapping of I/O and power supply modules without interrupting control execution, provided redundancy is active.
Q: What is the ESB bus switching behavior during a communication fault?
A: In dual-redundant mode, the standby ESB link assumes control automatically with no loss of I/O scanning continuity.
Q: Are there restrictions on total I/O loading?
A: Total current consumption of all installed I/O modules must remain within the rated output capacity of the dual power supplies to prevent voltage droop.
Field Installation Guidelines
Install the ANB10D in a grounded 19-inch rack with adequate rear clearance for ESB bus cabling. Use Yokogawa YCB301 cables for copper ESB connections, maintaining minimum bend radius and separation from high-voltage power wiring. Ensure shield termination at the rack ground point to suppress EMI. Verify power supply phasing before energizing. Confirm conformal coating integrity when deploying in corrosive atmospheres classified under ISA G3.
