TU841 ABB | 3BSE020848R1 Redundant Communication Interface
Manufacturer: ABB
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Part Number: TU841 3BSE020848R11
Condition：New with Original Package
Product Type: Module Termination Unit
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Country of Origin: Japan
Payment:T/T, Western Union
Shipping port: Xiamen
Warranty: 12 months
Product Description
Product Overview
The TU841 (Ordering Code: 3BSE020848R1) is a high-integrity Module Termination Unit (MTU) designed for the ABB S800 I/O system. It is specifically engineered to support redundant configurations of the TB840 or TB840A Optical ModuleBus Modems. This unit serves as the physical backbone for communication clusters where optical redundancy is required but the downstream I/O modules remain non-redundant. As a passive hardware component, the TU841 facilitates the distribution of the electrical ModuleBus, provides regulated power supply connections, and features an integrated rotary switch for quick cluster address identification within the System 800xA or AC 800M architecture.
Detailed Technical Specifications
The TU841 provides a robust environment for optical-to-electrical signal conversion and cluster management.
| Feature | Specification Details |
| Manufacturer | ABB |
| Model Number | TU841 |
| Product ID | 3BSE020848R1 |
| System Compatibility | S800 I/O, AC 800M, System 800xA |
| Modem Compatibility | Supports 2 x TB840 or TB840A Modems |
| ModuleBus Support | Single electrical ModuleBus output |
| Cluster Addressing | Rotary switch for addresses 1–7 |
| Mechanical Keying | 4 keys with 6 positions (36 unique configs) |
| Mounting | 35mm DIN rail with grounding latch |
| Isolation Rated | 50 V |
| Operating Temperature | -25 °C to +55 °C (-13 °F to 131 °F) |
| Dimensions (WxDxH) | 47 mm x 124 mm x 186 mm |
| Net Weight | 0.45 kg (1.0 lbs) |
| Protection Rating | IP20 |