The TU843 is a specialized Module Termination Unit (MTU) engineered for integration with redundant I/O modules within the ABB S800 I/O ecosystem. It acts as the mechanical and electrical anchoring base for dual I/O modules, establishing a robust interface that enables hot-swapping and seamless failover configurations in critical industrial processes. The base facilitates all field wiring connections and internal ModuleBus pass-through channels without breaking signal continuity during servicing.
This specific unit is configured for vertical DIN rail mounting, allowing control engineers to optimize cabinet layout and high-density tracking. Functioning safely within a low-voltage spectrum up to 50V, the unit manages discrete, analog, and communication loop distribution lines across automated control infrastructures managed by broader decentralized control networks.
| Parameter | Specification |
|---|---|
| Manufacturer | ABB |
| Model/Type Designation | TU843 |
| Product ID | 3BSE021443R1 |
| Product Type | Module_Termination_Unit |
| Rated Voltage | 50V maximum |
| I/O Redundancy | Supported |
| Mounting Orientation | Vertical DIN rail |
| Product Net Depth / Length | 64 mm |
| Product Net Height | 124 mm |
| Product Net Width | 186.5 mm |
| Product Net Weight | 0.66 kg |
| RoHS Information | Following EU Directive 2011/65/EU |
| WEEE Category | 5. Small Equipment (No External Dimension More Than 50 cm) |
| Number of Batteries | 0 |
| SCIP Number | 7c710169-c950-4bd8-ae0c-d8dba80a0de2 Bulgaria |
What is the core difference between the TU842 and the TU843 termination units?
The primary difference is the physical mounting layout. The TU842 is configured for horizontal DIN rail mounting, whereas this unit is structurally designed for vertical DIN rail installations.
Does this MTU require an isolated external grounding strap?
The device grounds through its DIN rail attachment, though following standard cabinet grounding practices by maintaining a low-impedance connection to the main backplate is required.
Can I run standard 120V AC control loops directly through this termination block?
No, this termination unit has a maximum rated technical voltage of 50V. Exceeding this limit compromises the safety and operational constraints of the device.
Are there internal batteries that require scheduling for maintenance replacement?
No, this passive termination unit contains zero batteries and relies entirely on external system bus architectures for operational logic.
What versions of the ABB 800xA control platform are compatible with this unit?
It is cataloged for compatibility with S800 I/O versions 4.0, 4.1, 5.0, 5.1, and System 800xA 6.0 setups.
Global Express Shipping
Returns & Warranty
Manufacturer: ABB
Product No.: 3BSE021443R1
Country of origin:Sweden,Bulgaria
Product Type: Redundant Module Termination Unit
Barcode: 85371098
Payment: T/T, Western Union
Weight: 660g
Dimensions: 186.5 mm x 124 mm x 64 mm
Shipping port: Xiamen
Warranty: 12 months
The TU843 is a specialized Module Termination Unit (MTU) engineered for integration with redundant I/O modules within the ABB S800 I/O ecosystem. It acts as the mechanical and electrical anchoring base for dual I/O modules, establishing a robust interface that enables hot-swapping and seamless failover configurations in critical industrial processes. The base facilitates all field wiring connections and internal ModuleBus pass-through channels without breaking signal continuity during servicing.
This specific unit is configured for vertical DIN rail mounting, allowing control engineers to optimize cabinet layout and high-density tracking. Functioning safely within a low-voltage spectrum up to 50V, the unit manages discrete, analog, and communication loop distribution lines across automated control infrastructures managed by broader decentralized control networks.
| Parameter | Specification |
|---|---|
| Manufacturer | ABB |
| Model/Type Designation | TU843 |
| Product ID | 3BSE021443R1 |
| Product Type | Module_Termination_Unit |
| Rated Voltage | 50V maximum |
| I/O Redundancy | Supported |
| Mounting Orientation | Vertical DIN rail |
| Product Net Depth / Length | 64 mm |
| Product Net Height | 124 mm |
| Product Net Width | 186.5 mm |
| Product Net Weight | 0.66 kg |
| RoHS Information | Following EU Directive 2011/65/EU |
| WEEE Category | 5. Small Equipment (No External Dimension More Than 50 cm) |
| Number of Batteries | 0 |
| SCIP Number | 7c710169-c950-4bd8-ae0c-d8dba80a0de2 Bulgaria |
What is the core difference between the TU842 and the TU843 termination units?
The primary difference is the physical mounting layout. The TU842 is configured for horizontal DIN rail mounting, whereas this unit is structurally designed for vertical DIN rail installations.
Does this MTU require an isolated external grounding strap?
The device grounds through its DIN rail attachment, though following standard cabinet grounding practices by maintaining a low-impedance connection to the main backplate is required.
Can I run standard 120V AC control loops directly through this termination block?
No, this termination unit has a maximum rated technical voltage of 50V. Exceeding this limit compromises the safety and operational constraints of the device.
Are there internal batteries that require scheduling for maintenance replacement?
No, this passive termination unit contains zero batteries and relies entirely on external system bus architectures for operational logic.
What versions of the ABB 800xA control platform are compatible with this unit?
It is cataloged for compatibility with S800 I/O versions 4.0, 4.1, 5.0, 5.1, and System 800xA 6.0 setups.
| Product Image | Model Number / Title | Condition | Availability | Action |
|---|---|---|---|---|
|
ABB 3BSE008544R2 AI820-eA S800 I/O Analog Input Module | Original New | In Stock | View Details |
|
ABB 3BSE008546R2 AO820-eA S800 Analog Output Module | Original New | In Stock | View Details |
Global Express Shipping
Returns & Warranty
Orders are processed and delivered Monday-Friday (excluding public holidays).
For full eligibility, restocking fees, and international return details, please view our official Refund & Return Policy .
| Color pattern |
Greyish White
Silver
|
| Country of origin |
Sweden
Bulgaria
|
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