Product Overview
The ABB TU847 3BSE022462R1 Module Termination Unit (MTU) is a passive termination unit engineered for redundant configuration of the field communication interface CI840/CI840A. It provides all necessary connections for power supply, electrical ModuleBus, and two CI840/CI840A modules. Two rotary switches allow station address settings from 0 to 99. A ModuleBus Optical Port TB842 can be connected to the TU847 via TB806, extending your network flexibility.
Four mechanical keys, two for each module position, prevent insertion of the wrong module type. Each key offers six positions, yielding 36 possible configurations. The unit requires space to its left for removal and cannot be replaced while power is applied. A G3 compliant version (TU847Z) is also available for harsh environments.
Key Features & Benefits
- Power supply connection for reliable operation.
- Two PROFIBUS connections for redundant communication.
- Two service tool connections for easy diagnostics.
- Rotary switches for station address setting (0–99).
- ModuleBus connections for seamless integration.
- Connector for ModuleBus Optical Port (TB842).
- Mechanical keying prevents incorrect module insertion.
- Latching device for DIN rail locking and grounding.
- DIN rail mountable for quick installation.
Technical Specifications
| Parameter |
Value |
| Article Number |
3BSE022462R1 |
| Communication Protocol |
PROFIBUS DP-V1 |
| Module Redundancy |
Yes |
| Hot Swap |
No |
| Type |
Redundant CI840/CI840A, Single I/O |
| Power Input |
24 V d.c. (19.2 – 30 V) |
| Mounting |
Vertical or Horizontal |
| PROFIBUS Connector |
DSUB9 |
| Service Ports |
RJ45 connector |
| ModuleBus Current Distribution |
Max 5 V 1.5 A / Max 24 V 1.5 A |
| Mechanical Key Combinations |
36 |
| Acceptable Wire Sizes |
0.25 – 2.5 mm², 24 – 14 AWG |
| Recommended Torque |
0.5 – 0.6 Nm |
| Stripping Length |
6 – 7.5 mm (0.24 – 0.30 in) |
| Rated Insulation Voltage |
50 V |
| Dielectric Test Voltage |
500 V a.c |
| Operating Temperature |
0 to +55 °C (+32 to +131 °F) |
| Storage Temperature |
-40 to +70 °C (-40 to +158 °F) |
| Relative Humidity |
5 – 95 % non-condensing |
| Max Ambient Temperature |
55 °C (131 °F); 40 °C (104 °F) for vertical mounting |
| Ingress Protection |
IP20 per IEC 529 |
| Dimensions (W × H × D) |
124 mm × 186 mm × 47 mm |
| Weight |
0.5 kg (1.1 lbs) |
Industry Applications
The ABB TU847 3BSE022462R1 is ideal for process industries where communication redundancy is critical, such as oil and gas, chemical, and power generation. It serves as the termination point for redundant CI840/CI840A modules in ABB's 800xA distributed control system.
In a typical scenario, the TU847 enables a redundant PROFIBUS DP-V1 network, ensuring uninterrupted communication between field devices and the controller. If one CI840 fails, the second takes over seamlessly, minimizing downtime and maintaining process integrity.
The unit's DIN rail mounting and vertical/horizontal orientation flexibility make it suitable for control cabinets with limited space, allowing efficient layout in existing panels.
Installation & Setup Guidance
Mount the TU847 3BSE022462R1 on a standard DIN rail using the latching device for secure locking and grounding. Ensure adequate space to the left for removal. Connect the 24 V DC power supply (19.2–30 V) to the designated terminals. Use DSUB9 connectors for PROFIBUS and RJ45 for service ports. Set the station address (0–99) using the rotary switches. Insert the CI840/CI840A modules and adjust the mechanical keys to match the module type—36 combinations are possible. Always power off before replacing any component; the unit does not support hot swap.
Maintenance & Reliability
Routine inspection of the TU847 should focus on connector tightness and physical damage. Check the DIN rail latch and grounding periodically. Ensure the ambient temperature stays within the specified range—for vertical mounting, the limit is 40 °C. Keep the unit free from dust and moisture; IP20 protection requires installation in a suitable enclosure. Regular checks of the mechanical key positions will prevent accidental misconfiguration.
Compatibility & Integration
The TU847 3BSE022462R1 is designed specifically for ABB CI840/CI840A communication interface modules. It supports PROFIBUS DP-V1 and can be integrated with a ModuleBus Optical Port TB842 via TB806. The unit is part of ABB's 800xA system and works with redundant configurations. Verify compatibility with your existing ABB controller before ordering.
Selection Guide & Purchasing Advice
When ordering the ABB TU847 3BSE022462R1, confirm your system's communication requirements and module type. Ensure your power supply provides 24 V DC within the specified range. Check the dimensions and mounting orientation to fit your cabinet. For G3 environments, consider the TU847Z variant. For a reliable source, PLC Source PRO offers genuine ABB TU847 units with fast shipping and professional support.