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Product Overview
The ABB TU865 3BSE078712R1 is a Module Termination Unit (MTU) designed for the Select I/O system within ABB’s 800xA platform. It provides connectivity and reliable communication between Ethernet Fieldbus Communication Interfaces (CI845), Ethernet adapters, and I/O modules. The unit supports both single and redundant configurations and can be mounted vertically on a DIN rail. It is tailored for modular and flexible I/O architecture in process automation.
Technical Specifications
| Parameter | Value |
|---|---|
| Article Number | 3BSE078712R1 |
| Communication Protocol | Ethernet |
| Mounting Type | 35 mm DIN rail |
| Supported Modules | CI845, TC810, TC811, HI880 |
| Power Supply Connection | Dual 24 V connectors (single/redundant) |
| Operating Temperature | -40°C to +70°C |
| Storage Temperature | -40°C to +85°C |
| Relative Humidity | 5% to 95% (non-condensing) |
| Altitude Range | -1000 to 5000 m |
| Protection Class | IP20 (IEC 60529) |
| EMC Standards | IEC/EN 61000-6-4, IEC/EN 61000-6-2 |
| Safety Standards | IEC/EN 61010 series, UL, CSA |
| Hazardous Area Certifications | ATEX, IECEx, cULus, CCC |
| Marine Certifications | DNV, ABS |
| RoHS/WEEE Compliance | EU, UAE, China RoHS, EU WEEE |
| Corrosion Protection | G3 environment |
| Dimensions (W x D x H) | 135 x 95.5 x 210 mm |
| Weight | 0.5 kg |
Applications
-
Process automation in oil & gas, chemical, and power industries
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Safety Instrumented Systems (SIS) up to SIL 3
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Modular cabinet configurations in distributed control systems
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Projects requiring late-stage I/O changes or scalability
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Environments requiring hazardous area certifications
Advantages
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Supports single and redundant Ethernet communication
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Simplifies I/O cabinet design and standardization
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Enables modular, scalable Select I/O architecture
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Suitable for use in hazardous areas with global certifications
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Integrates seamlessly with ABB’s 800xA automation platform
Frequently Asked Questions (FAQ)
Q1: What controllers are compatible with the TU865?
A1: It is compatible with ABB AC 800M controllers using CI845 Ethernet FCI modules.
Q2: Can TU865 be used in SIL 3 applications?
A2: Yes, with the optional HI880 High Integrity module.
Q3: What is the maximum number of MTUs it can connect to?
A3: Up to 12 Select I/O MTUs.
Q4: What kind of power supply does it require?
A4: It supports single or redundant 24 V DC power supplies.
Q5: Is the TU865 suitable for use in hazardous areas?
A5: Yes, it holds ATEX, IECEx, and cULus certifications for hazardous areas.
Q6: What is the environmental operating range?
A6: It operates between -40°C to +70°C with up to 95% humidity (non-condensing).
Q7: Does it support redundant communication modules?
A7: Yes, it supports both single and redundant configurations for CI845 and Ethernet adapters.
Q8: What is the mounting method for the TU865?
A8: It mounts vertically on a standard 35 mm DIN rail.
Q9: Is it compliant with international safety and EMC standards?
A9: Yes, it complies with IEC, UL, CSA, and EMC standards.
Q10: What is included in the TU865 package?
A10: The unit includes a TL814K01 cover plate as standard.
Related Models (Same Series or Functional)
| Model | Description | Dimensions (mm) | Weight |
|---|---|---|---|
| CI845 | Ethernet Field Communication Interface | 45 x 115 x 130 | 0.2 kg |
| TC810 | Ethernet Adapter (Single) | 45 x 115 x 130 | 0.2 kg |
| TC811 | Ethernet Adapter (Redundant) | 45 x 115 x 130 | 0.2 kg |
| HI880 | High Integrity Module for SIL 3 | 35 x 120 x 150 | 0.15 kg |
| TU860 | MTU for 16 channels I/O connection | 135 x 95.5 x 210 | 0.5 kg |
| TU861 | MTU with redundant field power connection | 135 x 95.5 x 210 | 0.5 kg |
Popular ABB Models
| Model | Description | Dimensions (mm) | Weight |
|---|---|---|---|
| PM865K01 | Controller Unit for AC 800M | 186 x 186 x 143 | 0.9 kg |
| AI810 | Analog Input Module (8 ch, 4-20 mA) | 59 x 120 x 135 | 0.3 kg |
| AO810 | Analog Output Module (8 ch, 4-20 mA) | 59 x 120 x 135 | 0.3 kg |
| DO810 | Digital Output Module (16 ch, 24 VDC) | 59 x 120 x 135 | 0.3 kg |
| DI820 | Digital Input Module (16 ch, 120 VAC) | 59 x 120 x 135 | 0.3 kg |
| CI854AK01 | Profibus DP Communication Interface | 45 x 120 x 120 | 0.25 kg |
