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ABB TU831V1 3BSE013235R1 extension module termination unit
1. Product Description
The ABB TU831V1 3BSE013235R1 is a dedicated extension module termination unit engineered for ABB AC 800M Distributed Control Systems (DCS), specifically designed to support wiring for AC 800M extension modules (e.g., remote I/O modules, distributed communication modules). It acts as a bridge between extension modules and field devices (sensors, actuators), enabling secure signal and power transmission in distributed control scenarios—such as remote process units or large-scale factory layouts where modules are installed away from the central cabinet. Unlike standard compact termination units, it features enhanced wiring flexibility for extension-specific pinouts and supports longer cable runs, while maintaining a space-efficient design. Equipped with anti-loosening screw terminals, flame-retardant insulation, and clear labeling, it ensures reliable connectivity, easy maintenance, and seamless integration with AC 800M extension modules, making it ideal for distributed automation systems requiring extended module deployment.
2. Detailed Parameters
3. Advantages & Features
- Extension Module Specialization: Tailored pinout design matches AC 800M extension modules’ wiring requirements (e.g., remote I/O signal lines, power feedback paths), eliminating adapter cables and reducing wiring errors.
- Enhanced Current & Cable Support: 15 A continuous current capacity (higher than standard compact units) and 0.2-4.0 mm² conductor compatibility handle power-hungry extension modules; supports 50-meter cable runs for distributed deployment.
- Anti-Interference Design: Optimized for shielded cable connections (terminal grounding points for cable shields), reducing electromagnetic interference (EMI) in long-distance wiring—critical for remote industrial sites (e.g., outdoor pump stations).
- Space-Efficient Extension Wiring: 48.3×140×60 mm compact form factor fits in small remote cabinets; side-by-side mounting with extension modules saves space and simplifies wiring routing.
- Industrial Durability: PA66 insulation resists oil, chemicals, and salt spray (salt spray resistance ≥800 hours); -40°C to +85°C operating range adapts to remote harsh environments (e.g., coastal refineries, mining sites).
4. Application Fields
- Remote Process Units: Used in oil refineries or chemical plants to wire remote AI801 analog modules (for tank level sensors) or DI803 digital modules (for pipeline valves) to field devices, extending control to distant process areas.
- Large-Scale Factory Distributed Layouts: Deployed in automotive or electronics factories to connect distributed DO802 relay modules (for assembly line actuators) to the central AC 800M DCS, reducing central cabinet size.
- Outdoor Automation Systems: Applied in solar farms or wind power plants to wire extension CI855K01 Ethernet modules (for inverter communication) or remote temperature sensors, withstanding outdoor temperature fluctuations.
- Mining & Heavy Industry: Used in mining sites to connect extension DI801 digital modules (for conveyor emergency stops) or AI801 pressure modules (for hydraulic systems), supporting long cable runs in harsh mining environments.
5. Precautions
- Extension Module Compatibility: Confirm compatibility with specific AC 800M extension modules (e.g., remote I/O vs. communication extensions) before installation; mismatched pinouts may cause signal failure.
- Shielded Cable Installation: Use shielded twisted-pair cables for long runs (>20 meters); connect cable shields to the unit’s dedicated grounding terminals to prevent EMI-induced signal distortion.
- Current Load Management: Do not exceed 15 A continuous current per terminal; for high-power devices (e.g., 12 A actuators), use separate terminals and avoid grouping ≥10 A loads on adjacent terminals.
- Remote Cabinet Protection: Install the unit in remote cabinets with IP65+ protection (for outdoor use) or IP54+ (for indoor dusty areas); use cable glands to seal entry points and prevent water/dust intrusion.
- Wiring Tension Control: Avoid pulling cables tightly when connecting to terminals; use cable supports every 1-2 meters for long runs to prevent terminal stress and contact loosening over time.
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The structure and details of the product:

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