Features:
- Modem-path resilience: The base accommodates the documented optical modem pair.
- Single downstream branch: The field-I/O side remains intentionally non-redundant.
- Revision-controlled purchase: The R11 suffix is retained throughout the page and enquiry record.
TU841 supports projects that require modem-pair availability without duplicating the downstream I/O path.
The correct spare decision depends on the actual cluster drawing and complete article suffix, not just the TU841 face marking.
Clear pre-removal records reduce the risk of swapped fibre, address, or downstream-bus connections.
Availability is subject to Apter Power's current inventory and sourcing confirmation.
TU841 3BSE020848R11 Manuals and Resources
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
TU841 3BSE020848R11 Optical ModuleBus Modem Termination Unit Specs
General
- Manufacturer ABB
- Model TU841 3BSE020848R11
- Condition New Original ready stock
- Product Family S800 I/O Communication Interfaces
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
- Architecture boundary: The modem pair is redundant while the electrical I/O branch is single.
- Failure analysis: Include the single branch in the project availability assessment.
- Topology proof: Use the as-built cluster drawing to confirm the arrangement.
- Change control: Treat any move to redundant I/O as an engineered redesign.
- Full article: Purchase against 3BSE020848R11.
- Label quality: Request a legible nameplate without cropped suffix characters.
- Record update: Replace shortened legacy references in the spare-parts list.
- Incoming check: Compare delivered label and connectors before warehouse acceptance.
- Address: Restore the documented rotary-switch position.
- Modem placement: Return each TB840/TB840A unit to its recorded side.
- Single bus: Trace the only electrical ModuleBus connection.
- Diagnostics: Clear and recheck cluster alarms after approved testing.