Xiamen Xingruijia Import and Export Co., Ltd. has been specializing in the sales of industrial control equipment spare parts for 20 years. For more ABB models, please refer to the product list . If you need other brands or models, please contact us. We have a variety of brands and models in stock, and we can purchase difficult to order models for you. We look forward to your inquiry!!!

First hand source//affordable price//Spot inventory!

•Shipping Port: Xiamen

•E-mail: sales7@saulplc.com

•Tel/WhatsApp/Wechat: + 86-15359273796

•Ship to you via Fedex/DHL/TNT/UPS/EMS

•Package: Original packing with cartons

==============================================================================================================================================

ABB 3BSE021447R1 TU845

ABB 3BSE021447R1 TU845 is a Module Termination Unit (MTU) used in the ABB S800 I/O system for ABB System 800xA / Freelance DCS environments. It is a redundant, 50 V, vertical-mount MTU designed to connect field wiring to redundant S800 I/O modules.

1. Basic Information

2. Main Function

The TU845 provides the interface between field devices and S800 I/O modules. It performs:

• Field signal termination
• Field power distribution
• ModuleBus connection and signal routing
• Mechanical keying to prevent incorrect I/O module installation
• Redundant I/O module connection support

The MTU distributes two ModuleBuses, one to each I/O module and onward to the next MTU, while generating module addressing signals.

3. Compatible I/O Modules

ABB TU845 is designed for use with:

• ABB AI845
• ABB AI880
• ABB AI880A
• ABB DP840

4. Technical Specifications

I/O Connections

• Up to 8 I/O channels
• Two I/O terminals per channel
• ZP (zero potential) connection per channel
• 2+2 process voltage connections

Electrical Ratings

• Maximum voltage: 50 V
• Maximum current per I/O channel: 2 A
• Maximum process connection current: 5 A
• Dielectric test voltage: 500 V AC

Wiring

• Solid wire: 0.2–4 mm²
• Stranded wire: 0.2–2.5 mm² (24–12 AWG)
• Recommended torque: 0.5–0.6 Nm

5. Mechanical Data

6. Environmental Specifications

• Operating temperature: 0 to +55 °C
• Storage temperature: -40 to +70 °C
• Protection class: IP20
• Relative humidity: 5–95% non-condensing
• EMC compliance: EN 61000-6-2 / EN 61000-6-4
• Hazardous area approvals available (depending on configuration)

7. Key Features

• ✅ Supports redundant S800 I/O configurations
• ✅ DIN rail mounting with grounding latch
• ✅ Mechanical coding prevents incorrect module insertion
• ✅ Supports 2-wire field device connections
• ✅ Provides integrated field power connections
• ✅ Suitable for process automation applications

8. Typical Applications

ABB TU845 is commonly used in:

• Oil & gas plants
• Power generation facilities
• Chemical processing systems
• Water treatment plants
• Industrial automation systems
• ABB System 800xA control systems

9. Related Parts

Conclusion

The ABB 3BSE021447R1 TU845 is a reliable redundant S800 I/O Module Termination Unit optimized for ABB 800xA and Freelance control systems. Its 8-channel, 50 V design, redundant architecture, and compatibility with AI845/AI880/AI880A/DP840 modules make it suitable for critical process automation installations requiring high availability.