Description
The ABB TU840 is a module termination unit (MTU) designed for redundant configurations within the ABB S800 I/O system used in industrial automation applications. Here’s a breakdown of its key characteristics:
Function:
- Connects redundant Optical ModuleBus Modem units (TB840/TB840A) to the S800 I/O system, enabling a fault-tolerant communication path between the controller and I/O modules.
- Terminates the ModuleBus signal on both redundant paths, preventing signal degradation.
Applications:
- Used in critical industrial automation applications where system uptime is crucial.
- Provides a backup communication channel in case of a failure in one of the ModuleBus Modem units.
Specifications (based on available information):
- Compatibility: Designed specifically for the ABB S800 I/O system and works with TB840/TB840A Optical ModuleBus Modems.
- Dimensions: Specific dimensions are difficult to find without a datasheet, but being a compact unit, it’s likely suitable for space-constrained industrial control cabinets.
Finding Information:
While ABB might not actively promote the TU840 anymore, here are some resources you can explore to learn more:
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ABB Website: Search for “TU840” or the product code on the ABB website You might find resources or links to archived product information, although it might be limited.
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Datasheet and User Manuals: Look for the official datasheet and user manuals for the TU840. These documents provide detailed information about the unit’s functionalities, wiring diagrams, and configuration procedures. You can try searching ABB’s website or contacting their support for these documents.
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Online Resources: Several online resources discuss the ABB S800 I/O system and its components. You might find references to the TU840 in these resources,
