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The ABB TU842 3BSE020850R1 Redundant Module Termination Unit is designed for high-reliability signal distribution in S800 I/O systems. Supporting up to 16 I/O channels and 2+2 process voltage connections, it ensures robust performance in demanding industrial environments.
Its dual ModuleBus architecture enables seamless data flow between connected modules, while mechanical keying prevents incorrect module insertion. The TU842 3BSE020850R1 is ideal for applications requiring redundancy, precision, and compact installation.
| Parameter | Value |
|---|---|
| Model Number | TU842 3BSE020850R1 |
| Manufacturer | ABB |
| Product Type | Redundant Module Termination Unit |
| System | S800 I/O DCS |
| Channels Supported | Up to 16 |
| Process Voltage Connections | 2 + 2 |
| Max Voltage | 50 V |
| Max Current per Channel | 3 A |
| Mechanical Key Positions | 36 (4 keys total) |
| Mounting Type | DIN Rail |
| Dimensions (L×W×H) | 18.5 × 13 × 6 cm |
| Weight | 0.6 kg |
| HS Code | 8537101190 |
| Origin | Sweden |
| Condition | Brand New |
| Availability | In Stock |
| MOQ | 1 Unit |
The ABB TU842 3BSE020850R1 is ideal for distributed control systems requiring redundant signal paths and secure module addressing. Its 3-wire connection support and field power distribution make it suitable for power generation, chemical processing, and manufacturing automation.

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Extensive stock of industrial automation and discontinued parts, ready for immediate shipment.
Every product — including obsolete items — is covered by a 12-month warranty and 30-day return guarantee.