Description
Product Overview
The ABB TU846 is a high-performance Redundant Module Termination Unit (MTU) designed for ABB’s S800 I/O platform, a cornerstone of industrial automation systems. Engineered to support CI840 field communication interface modules, this baseplate provides a secure mechanical and electrical foundation for redundant I/O configurations in mission-critical environments. The TU846 enables vertical mounting of modules, optimizing cabinet space while ensuring reliable signal transmission and power distribution. With integrated power connectors and TB807 module bus terminators, it supports seamless integration into 800xA distributed control systems and other industrial networks, enhancing system availability in applications such as oil refining, power generation, and chemical processing.
Designed for fault tolerance, the TU846 supports 1+1 redundancy for CI840 modules, ensuring continuous operation even in the event of a module failure. Its robust construction includes flame-retardant materials and gold-plated contacts, ensuring resistance to corrosion, moisture, and extreme temperatures. The unit’s compact dimensions (47 x 186 x 124 mm) and DIN rail mounting facilitate installation in confined spaces, while its shielded design complies with electromagnetic compatibility standards (EN 61000) and vibration resistance (IEC 60068-2-6). By minimizing signal degradation and downtime, the TU846 delivers long-term cost savings in demanding industrial settings.
Technical Specifications
Parameter Name | Parameter Value |
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Product Model | ABB TU846 (3BSE022460R1) |
Manufacturer | ABB |
Product Type | Redundant Module Termination Unit (MTU) |
Compatibility | CI840 field communication interface modules |
Power Supply | 24V DC ±10% |
Current Capacity | 5A (process connection) |
Dielectric Test Voltage | 500V AC |
Operating Temperature | 0°C to +55°C (vertical mounting: +40°C) |
Storage Temperature | -40°C to +70°C |
Physical Dimensions | 47 x 186 x 124 mm (D x H x W) |
Weight | 0.5 kg |
Mounting Method | 35 mm DIN rail |
Certifications | CE, UL, ATEX Zone 2 (EEx nA IIC T4) |
Key Features and Advantages
Redundancy for Critical Operations: The TU846 supports 1+1 redundancy for CI840 modules, ensuring system uptime by automatically switching to the backup module in case of a failure. This feature is critical for applications like offshore platforms and nuclear power plants, where downtime can lead to significant financial losses or safety risks.
Space-Optimized Vertical Mounting: Unlike traditional horizontal mounting, the TU846 allows vertical installation of CI840 modules, reducing cabinet space by up to 30% while maintaining easy access for maintenance. This design is particularly beneficial in compact control rooms or mobile installations.
Rugged Industrial Design: Constructed with halogen-free, flame-retardant materials and gold-plated contacts, the TU846 resists corrosion, moisture, and extreme temperatures (-40°C to +70°C), making it suitable for harsh environments such as mining sites and chemical plants. Its IP20-rated enclosure and pollution degree 2 compliance ensure stable performance in dusty or electrically noisy settings.
Hot-Swap Capability: The TU846 supports hot-swappable module replacement, enabling maintenance without system shutdown. This feature minimizes downtime in continuous-process industries like oil refining and water treatment.
Comprehensive Certification: With ATEX Zone 2 certification (EEx nA IIC T4), the TU846 is approved for use in potentially explosive environments, such as gas processing facilities and paint spray booths. This certification ensures compliance with strict European safety standards, expanding its applicability in global markets.
Applications
The ABB TU846 excels in industries requiring high-reliability I/O termination in distributed control systems:
- Oil & Gas: Supports redundant CI840 modules in offshore platforms and refineries, ensuring real-time monitoring of pressure, flow rates, and temperature in hazardous areas.
- Power Generation: Enables fault-tolerant communication between I/O units in thermal and nuclear power plants, ensuring stable turbine control and generator synchronization.
- Chemical Processing: Provides robust connectivity for distributed control units in petrochemical plants, withstanding corrosive environments and extreme temperatures.
- Mining: Delivers reliable signal transmission for conveyor systems and crushing equipment in underground and surface mines, even in dusty or vibration-prone conditions.
- Water Treatment: Ensures seamless communication between decentralized control units in wastewater treatment facilities, optimizing process automation and energy efficiency.
By integrating with ABB’s S800 I/O platform and 800xA DCS, the TU846 ensures mission-critical processes operate with minimal latency and maximum uptime.
Related Products
- ABB CI840: PROFIBUS DP-V1 interface module requiring TU846 for redundant mounting in industrial networks.
- ABB TB807: Module bus terminator included with TU846 for signal integrity in S800 I/O systems.
- ABB TU847: Non-redundant MTU for CI840 modules, complementary to TU846 in mixed I/O setups.
- ABB TK850: CEX-Bus extension cable for expanding communication paths in redundant TU846 configurations.
- ABB PM858K02: Redundant processor unit for 800xA systems, leveraging TU846 for I/O connectivity.
- ABB TP830: Baseplate for mounting PM858 processors and TU846 modules in control cabinets.
- ABB AI810: 8-channel analog input module compatible with TU846 for temperature and pressure monitoring.
- ABB AO810V2: 8-channel analog output module requiring TU846 for signal termination in control valve applications.
Installation and Maintenance
Installation Preparation:
- Mount the TU846 vertically on a 35 mm DIN rail, ensuring 25 mm clearance for ventilation.
- Connect the TU846 to the 24V DC power supply and terminate signals using the integrated screw terminals.
- Secure the CI840 module onto the baseplate, aligning the connectors and locking the module in place.
Maintenance Recommendations:
- Monthly: Inspect connectors for corrosion or loose connections, particularly in humid environments.
- Yearly: Verify power supply voltage and signal continuity using a multimeter. Replace the TU846 if oxidation exceeds 5% of contact surfaces.
- Every 3 Years: Perform a full system diagnostic to validate signal quality and redundancy switching time, ensuring compliance with ABB’s performance standards.
Product Warranty and Support
ABB guarantees the TU846 against defects in materials and workmanship for 1 year from purchase. This warranty covers repair or replacement of faulty units, excluding damage from improper installation or environmental factors. Customers benefit from ABB’s global technical support network, including 24/7 remote diagnostics and on-site commissioning services. Extended warranty plans are available for mission-critical applications, ensuring maximum system availability.
Product Information
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Brand Model: ABB TU846
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Product Name: Redundant Module Termination Unit
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Warranty: 1 year
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Size: 47 x 186 x 124 mm
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Weight: 0.5 kg
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Origin: Sweden
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Inventory: Spot/Futures
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Delivery Time: Goods in stock will be dispatched within 3 days after payment
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Order Time: Goods will be dispatched within one month after payment
Contact info
- WhatsApp: +86 18030182217
- Email: sandydcsplc@gmail.com
- Phone: +86 18030182217
- Wechat: +86 18030182217
- Website: www.xiongbaparts.com