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Yokogawa ANB11D-B25/BU2A Communication Modules
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- Part Number: ANB11D-B25/BU2A
- Brand: Yokogawa
- Type: Communication Modules
- Dimensions: 3.3x10.7x13cm
- Country of Origin: Japan
- Barcode: 8537101190
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Additional Specifications
| Color / Pattern |
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| Power Source |
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| Communication Protocols |
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Tags:
Communication Modules
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Yokogawa CENTUM
Product Description
The Yokogawa ANB11D-B25/BU2A, also cataloged as the ANB11D-B25/BU2A Node Unit for dual-redundant ESB Bus with Optical Repeater, operates as a dedicated hardware component for high-speed data acquisition and remote communication extension within Yokogawa industrial automation platforms.
Suffix Breakdown & Model Matrix
| Suffix Segment | Parameter Designation | Description & Configuration |
|---|---|---|
| ANB11D | Base Model | Node Unit for dual-redundant ESB Bus with optical repeater |
| B | Power Supply / Distance | Dual-redundant AC power configuration supporting optical repeater link |
| 2 | Power Input Rating | 220-240 V AC power supply input |
| 5 | Environmental Rating | Basic type with no explosion protection classification |
| /BU2A | Connector Suffix | Connector unit for ESB Bus with built-in terminator |
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | ANB11D-B25/BU2A |
| Brand | Yokogawa |
| Origin | Global Manufacturing Facility |
| Weight | System-dependent rack enclosure format |
| Dimensions | 19-inch rack mount form factor |
| Operating Temp | -20 deg C to +70 deg C |
| Power Consumption | Dual-redundant AC (220-240 V AC at 50/60 Hz) |
| Communication Interface | ESB Bus (Synchronous) with integrated optical repeater |
| Onboard Elements | BU2A connector unit with built-in bus terminator |
4-20 mA HART Loop Protocol and Channel Isolation
The node unit manages process signal routing through robust internal isolation architecture, protecting sensitive backplane communications from ground loops and electrical transients. FOUNDATION Fieldbus and Profibus PA connectivity frameworks operate seamlessly across the overarching DCS infrastructure, while cold junction compensation (CJC) maintains thermal equilibrium for analog termination blocks. 4-20 mA HART loop protocol compatibility ensures reliable transmission of multi-variable field instrument data without signal attenuation.
Frequently Asked Questions
Q: What is the specific function of the BU2A connector unit on this node?
A: The BU2A suffix indicates an ESB bus connector unit equipped with a built-in terminator to maintain proper line impedance and signal integrity.
Q: Does the ANB11D-B25/BU2A support redundant power inputs?
A: Yes. The hardware architecture features a dual-redundant AC power supply configuration operating at 220-240 V AC to prevent downtime during power faults.
Q: Can this node unit be replaced while the control network is energized?
A: Replacement procedures must comply with Yokogawa system safety guidelines, ensuring proper power isolation and bus redundancy protocols are maintained.
Field Installation Guidelines
- Mount the 19-inch rack unit securely into the industrial cabinet using appropriate M5 mechanical fasteners and clearance spacing.
- Verify that all 220-240 V AC power feeds are locked out and tested for zero energy state prior to wiring connections.
- Connect the dual-redundant optical repeater lines and ESB bus communication cables carefully, ensuring the BU2A terminator is correctly positioned at the bus termination point.
- Check power status indicators and verify optical link communication quality using engineering software prior to system re-energization.
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