Overview
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | ANB11D-615/BU2A |
| Brand | Yokogawa |
| Product Type | Optical ESB Bus Node Units |
| System Compatibility | CENTUM VP / CENTUM CS 3000 Distributed Control Systems |
| Communication Interface | Optical ESB Bus with integrated optical repeater |
| Optical Connector | LC type connector compliant with IEC61754-20 |
| Fiber Cable Type | Quartz single-mode optical fiber, 2 cores |
| Maximum Transmission Distance | Up to 5 km or 50 km depending on paired optical equipment configuration |
| Power Supply | Dual-redundant power supply configuration |
| Input Voltage | 100 to 120 V AC |
| Voltage Range | 85 to 132 V AC |
| Frequency | 50/60 Hz +/- 3 Hz |
| Power Consumption | 200 VA / 120 W |
| I/O Capacity | Supports up to 8 FIO modules |
| Mounting Method | 19-inch rack mounting with M5 screw fixing holes |
| Weight | Approximately 10 kg with 8 installed I/O modules |
| Dimensions | 19-inch rack installation format |
| Operating Temp | -20 to 70 deg C |
| Humidity Range | 5 to 95% RH, non-condensing |
| Environmental Protection | ISA Standard G3 conformal coating |
Process Control Signal Interface and Optical ESB Communication
The ANB11D-615/BU2A uses an optical ESB Bus interface to transfer FIO communication data between remote node locations and Yokogawa Field Control Units. Moreover, the integrated optical repeater converts electrical ESB Bus communication into optical transmission, allowing extended communication distances through single-mode fiber connections.
The unit supports dual-redundant communication paths and dual-redundant power input architecture. Therefore, the node unit maintains continuous communication between field I/O modules and the control system during normal redundancy switching operations.
For Yokogawa process instrumentation systems, the hardware architecture supports signal processing environments based on analog and digital field devices. In addition, Yokogawa DCS interfaces commonly integrate 4-20 mA HART loop protocol, FOUNDATION Fieldbus, and Profibus PA connectivity through compatible I/O modules. The ANB11D node structure provides the physical communication platform for these field-level interfaces.
Frequently Asked Questions
Q: Does the ANB11D-615/BU2A support optical ESB Bus extension over long distances?
A: Yes. The unit includes an optical repeater function and supports optical fiber transmission distances according to the connected optical ESB Bus equipment configuration.
Q: What power redundancy configuration does the ANB11D-615/BU2A provide?
A: The unit supports dual-redundant power supply operation using two independent power input paths to maintain node availability.
Q: How many FIO modules can be installed with this node unit?
A: The ANB11D-615/BU2A rack configuration supports installation of up to 8 FIO modules.
Field Installation Guidelines
- Install the ANB11D-615/BU2A in a compatible 19-inch rack structure and secure the chassis using the specified mounting points.
- Route optical fiber cables separately from high-voltage power cables to reduce mechanical stress and electromagnetic interference risks.
- Maintain correct LC optical connector handling procedures and prevent contamination of optical surfaces during installation.
- Connect protective grounding according to the DCS cabinet grounding design and verify grounding continuity before system startup.
- Confirm dual-redundant power wiring polarity, voltage range, and terminal connections before energizing the node unit.
- Check optical communication status after installation and verify communication continuity between the node unit and connected Field Control Unit.
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