Overview
Suffix Breakdown & Model Matrix
The ANB11D-B25 model identifies the node unit configuration for dual-redundant ESB Bus operation with an optical repeater function.
| Code | Specification |
|---|---|
| ANB11D | Node Unit for Dual-Redundant ESB Bus with Optical Repeater |
| B | Optical repeater configuration for 50 km transmission distance |
| 2 | 220 – 240 VAC power supply option |
| 5 | Basic type without explosion protection |
| /BU2A | ESB Bus connector unit interface option |
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | ANB11D-B25/BU2A |
| Brand | Yokogawa |
| Origin | Japan |
| Product Type | Optical ESB Bus Node Unit |
| System Platform | CENTUM VP / CENTUM CS 3000 |
| Bus Interface | Dual-Redundant ESB Bus |
| Optical Function | Optical repeater for ESB signal transmission |
| Maximum Optical Transmission Distance | Up to 50 km |
| Power Supply | 100 – 120 VAC, 220 – 240 VAC, or 24 VDC depending on configuration |
| Frequency | 50/60 Hz |
| Power Consumption | 100 – 120 VAC: 200 VA, 120 W; 220 – 240 VAC: 230 VA, 120 W; 24 VDC: 5.5 A |
| Weight | 10 kg including 8 I/O modules |
| Mounting | 19-inch rack mounting with M5 x 4 screws |
| I/O Module Capacity | 8 FIO module slots |
Yokogawa DCS Signal Interface Characteristics
The ANB11D-B25/BU2A operates as an optical ESB network node within Yokogawa DCS architectures. Moreover, it converts electrical ESB communication signals into optical transmission signals to support extended remote I/O installation distances.
The unit provides dual-redundant ESB communication paths and supports physical separation between control equipment and remote field I/O locations. In addition, Yokogawa DCS configurations can apply channel-to-channel isolation methods at the connected I/O module level to reduce signal interference between field circuits.
The optical repeater design uses fiber communication to maintain signal transmission over extended distances. Therefore, installation engineers can place FIO nodes away from the main control equipment while maintaining ESB network communication.
Frequently Asked Questions
Q: Does the ANB11D-B25 support dual power supply operation?
A: Yes. The ANB11D-B25 uses a dual-redundant power supply configuration according to the provided model specification.
Q: What rack installation method does the ANB11D-B25 require?
A: The unit uses 19-inch rack mounting and installs with M5 x 4 screws. An insulation base is included as an accessory.
Q: How many I/O modules can the node unit accommodate?
A: The ANB11D-B25 supports installation of 8 FIO modules within the node unit structure.
Field Installation Guidelines
- Install the ANB11D-B25 in a compatible 19-inch rack using the specified mounting hardware.
- Confirm the selected power supply voltage matches the installed suffix configuration before energizing the unit.
- Route optical fiber cables separately from high-voltage power wiring to reduce mechanical stress and electromagnetic interference risks.
- Maintain proper cable bending radius according to the optical fiber cable manufacturer requirements.
- Connect grounding and insulation accessories according to the system cabinet design requirements.
- Verify ESB Bus wiring polarity, connector seating, and redundant communication paths before system startup.
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