ABB TU847

Description

ABB TU847 Module Termination Unit (MTU)

1. Product Description

• Redundancy Support: Features dual PROFIBUS DP ports and a failover mechanism, ensuring continuous communication in mission-critical applications by automatically switching to a backup path in case of primary port failure.
• Signal Termination: Provides 27 isolated terminals (3×9 configuration) for connecting analog (4–20mA, 0–10V) and digital (NAMUR sensors, voltage-free contacts) signals, with color-coded wiring for easy installation and maintenance.
• Rugged Design: Engineered to withstand operating temperatures from 0°C to +55°C and storage temperatures from -40°C to +70°C, resisting vibrations, moisture, and electromagnetic interference (EMI) for reliable performance in demanding industrial settings.
• Wide Compatibility: Works seamlessly with ABB’s S800 I/O modules (e.g., AI890, DI890) and third-party devices, supporting both standard and safety-related signals in a single unit.

2. Technical Parameters

Parameter	Specification
Brand	ABB
Model	TU847
Type	Module Termination Unit (MTU)
Signal Terminals	27 isolated terminals (3×9 configuration)
Wiring Capacity	Supports solid/stranded wires (0.2–4 mm²)
Voltage Supply	24V DC ±10% (derived from S800 I/O system)
Communication Interfaces	PROFIBUS DP (dual ports), RJ45 (Ethernet)
Operating Temperature	0°C to +55°C (non-condensing humidity: 5%–95%)
Storage Temperature	-40°C to +70°C
Dimensions (H×W×D)	186mm × 124mm × 47mm
Weight	0.55 kg
Compatibility	ABB CI840/CI840A field communication interfaces, S800 I/O modules, and third-party devices
Certifications	CE, RoHS, ATEX/IECEx (for hazardous areas), marine compliance (ABS, BV, DNV-GL)

ABB TU847

3. Advantages and Features

• High Availability through Redundancy: The dual PROFIBUS DP ports reduce downtime by up to 40% in critical systems, as the module automatically switches to the backup port if the primary connection fails. This is crucial for industries where uninterrupted communication is non-negotiable, such as oil refineries or nuclear power plants.
• Flexible Signal Integration: Supports a mix of analog and digital signals, eliminating the need for separate termination units. For example, it can connect pressure transmitters (4–20mA) and safety interlock switches (digital signals) simultaneously, streamlining wiring and reducing component clutter by 30%.
• Robust Environmental Resilience: Withstands extreme temperatures and EMI, outperforming standard termination units in harsh environments. Its industrial-grade construction ensures a mean time between failures (MTBF) exceeding 150,000 hours, minimizing maintenance costs over the product lifecycle.
• Space-Efficient Design: At 186mm × 124mm × 47mm, the TU847 is compact enough for retrofitting into existing control cabinets, optimizing space usage without compromising on functionality.

4. Application Areas and Case Study

Application Areas:

• Chemical Processing: Manages signal termination for temperature, pressure, and flow sensors in chemical reactors, ensuring precise control and safety.
• Oil and Gas: Integrates with valves, pumps, and gas detectors in offshore platforms and refineries, supporting redundant communication to prevent data loss in harsh marine environments.
• Power Generation: Connects turbine sensors and generator control systems in thermal and renewable energy plants, maintaining stable signal transmission for grid synchronization.
• Manufacturing: Facilitates communication between robotic arms, conveyor belts, and PLCs in automated production lines, enhancing process efficiency.

Case Study:

5. Competitive Comparison

• Dual Redundancy Ports: Uniquely supports dual PROFIBUS DP connections, a feature that many alternatives lack, making it ideal for high-availability systems.
• Mixed Signal Support: Natively handles both analog and digital signals in a single unit, reducing the need for multiple modules and simplifying system design.
• Stringent Safety and Environmental Certifications: Meets ATEX/IECEx and marine standards, making it suitable for hazardous and offshore applications where few competitors offer equivalent compliance.
  

  ABB TU847

6. Selection Recommendations

• Redundancy Needs: Choose the TU847 if your application requires failover capabilities for critical communication, such as in safety instrumented systems (SIS) or uninterruptible power supply (UPS) setups.
• Signal Types: Ensure the module’s terminal configuration and signal compatibility match your field devices (e.g., 4–20mA for analog sensors, NAMUR for digital safety switches).
• Environmental Conditions: Verify the operating temperature range (0°C to +55°C) and humidity tolerance (5%–95% non-condensing) align with your installation site, especially for outdoor or high-temperature environments.
• System Compatibility: Confirm integration with your existing ABB S800 I/O system or third-party platforms that support PROFIBUS DP or Ethernet communication.

7. Precautions

• Installation:
  • Power down the entire system before installing or replacing the TU847 to prevent electrostatic discharge (ESD) damage to internal components.
  • Use shielded cables for signal connections and route them separately from high-voltage power cables to minimize EMI interference.
• Maintenance:
  • Regularly inspect terminal connections for tightness and corrosion, particularly in humid or corrosive environments.
  • Update firmware using ABB’s official software (e.g., Control Builder M) to ensure compatibility with the latest system updates and security patches.
• Storage:
  • Store unused TU847 modules in their original packaging in a dry, dust-free environment within the specified storage temperature range (-40°C to +70°C).
  • Handle the module with anti-static wrist straps or gloves to protect against ESD during handling.