Overview
Manuals
Single ModuleBus Path
Arrangement
Optical Cluster Setup
Features:
- single electrical ModuleBus for two TB840/TB840A modems for the documented signal arrangement
- S800 I/O station mounting with module-key and wiring verification
- optical ModuleBus termination unit for non-redundant I/O for the confirmed installation
ABB identifies TU841 3BSE020848R11 as optical modulebus termination unit for non-redundant i/o for ABB S800 I/O. TU841 supports redundant communication modems with a single electrical ModuleBus to non-redundant S800 I/O. The unit forms the mechanical and electrical base between the selected I/O module and the field wiring, so channel mapping, voltage class and terminal configuration must be preserved during service. The complete ordering identity is important because related units can differ in channel arrangement, termination design, interface function or supported system generation. Selection should therefore be based on the article number, nameplate and installed configuration rather than appearance alone.
Technical content is limited to ABB S800 I/O System for Compact Product Suite data sheet. Final suitability is confirmed against the installed unit, nameplate and system records.
The ABB TU841 3BSE020848R11 optical ModuleBus termination unit for non-redundant I/O is supported by Moore Automated for verified industrial replacement and spare-part requirements.
ABB TU841 3BSE020848R11 optical ModuleBus termination unit for non-redundant I/O manual(Datasheets), Link
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.
Single ModuleBus Path
TU841 uses single electrical ModuleBus for two TB840/TB840A modems; preserve the documented terminal-bank organization and field-wire identification.
Dual-Modem Arrangement
Confirm the selected S800 I/O module, non-redundant I/O cluster arrangement, voltage class and any power, fuse or modem dependency before replacement.
Optical Cluster Setup
Isolate the station, photograph and label every conductor, compare the module key and terminal numbers, and follow ABB recommissioning checks.
