ABB TU840 3BSE020846R1 Termination Unit – AC 800M Controller Series
In a continuous process plant — whether a petrochemical refinery, a pulp and paper mill, or a power generation facility — the integrity of every signal path between field instruments and the control system is mission-critical. When a termination unit fails or is missing, field I/O signals cannot be reliably routed to the processor module, resulting in blind control loops, unplanned shutdowns, and potentially catastrophic process upsets. The ABB TU840 3BSE020846R1 Termination Unit is the essential hardware interface that keeps those signal paths intact, ensuring your AC 800M-based DCS operates without interruption.
The TU840 (catalog reference 3BSE020846R1) occupies a precise position within ABB’s AC 800M controller family — one of the most widely deployed distributed control system platforms in heavy industry worldwide. As a dedicated termination unit, it provides the mechanical and electrical connection point between field wiring and the corresponding I/O or communication module, eliminating loose-wire risk and simplifying cabinet maintenance. With ABB’s AC 800M installed across thousands of sites in over 100 countries, genuine spare parts like the TU840 are in constant global demand, making reliable sourcing a strategic priority for every plant maintenance team.
Technical Specifications
- Manufacturer: ABB
- Part Number / SKU: TU840 3BSE020846R1
- Product Type: Termination Unit
- Compatible System: ABB AC 800M DCS Platform
- Weight: 420 g
- Condition: New / Surplus / Refurbished (specify on inquiry)
Note: All electrical ratings, I/O channel counts, and bus specifications are confirmed from official ABB documentation upon order inquiry. We do not publish unverified parameters.
Key Features & Benefits
- Genuine ABB Hardware: Sourced from authorized channels and verified against ABB part numbering standards — no counterfeit risk.
- Plug-and-Play Replacement: Direct drop-in replacement for existing TU840 units in AC 800M cabinets, minimizing downtime during maintenance windows.
- Secure Field Wiring Interface: Provides a robust, vibration-resistant termination point that protects signal integrity in demanding industrial environments.
- Simplified Cabinet Maintenance: Module swap without re-wiring field cables — the termination unit stays in place while the I/O module is replaced.
- Long Service Life: Engineered to ABB’s industrial-grade standards for continuous operation in process control environments.
- Global Availability: Konmask.com maintains sourcing networks to fulfill urgent and planned procurement requests worldwide.
Industry & Equipment Applications
- Oil & Gas: Upstream wellhead control, midstream pipeline SCADA, downstream refinery DCS cabinets.
- Power Generation: Turbine control systems, boiler management, grid-connected plant automation.
- Pulp & Paper: Continuous digester control, bleaching line automation, recovery boiler management.
- Chemical & Petrochemical: Reactor loop control, distillation column automation, safety instrumented systems (SIS) integration.
- Water & Wastewater: Pump station control, treatment plant process automation.
- Mining & Minerals: Conveyor and crusher control, flotation cell automation.
System Integration & Compatible Parts
The TU840 3BSE020846R1 is designed for use within the ABB AC 800M ecosystem. When planning a replacement or system expansion, consider the following commonly paired components:
- ABB AC 800M PM851 / PM856 / PM860 Processor Modules
- ABB S800 I/O Modules (AI810, AO810, DI810, DO810 series)
- ABB TB820 / TB840 ModuleBus Optical Port modules
- ABB CI854 / CI857 Communication Interface Modules
- ABB SD821 / SD822 Power Supply Units
Contact our technical team to confirm compatibility with your specific cabinet revision and firmware version before ordering.
Our Quality Assurance Process
- Part Verification: Every unit is cross-checked against ABB’s official part number database (3BSE020846R1) before shipment.
- Visual & Physical Inspection: Connectors, PCB condition, labeling, and housing integrity are inspected by our technical staff.
- Traceability: Batch and serial records are maintained for full supply chain traceability.
- Secure Packaging: ESD-safe packaging with anti-static bags and foam inserts to prevent transit damage.
- Documentation: Certificate of conformity and inspection report available upon request.
How to Order
- Submit an inquiry via the “Request a Quote” button on this page or email [email protected].
- Provide your required quantity, delivery timeline, and destination country.
- Our team will confirm availability, lead time, and provide a formal quotation within 24 business hours.
- Upon PO confirmation, we arrange export documentation, packaging, and shipment via your preferred freight method (DHL, FedEx, sea freight, etc.).
- Track your shipment with our provided logistics reference until delivery.
Why Choose Konmask.com?
- Industrial Automation Specialists: We focus exclusively on DCS, PLC, and industrial control components — not a generalist marketplace.
- B2B Export Experience: Serving procurement teams, MRO buyers, and engineering contractors across Asia, Europe, the Middle East, and the Americas.
- Fast Response: Dedicated account managers respond to RFQs within one business day.
- Flexible MOQ: Single-unit orders accepted for urgent maintenance needs; volume pricing available for project procurement.
- Secure Transactions: T/T, L/C, and other standard B2B payment terms supported.
- After-Sales Support: Technical guidance available post-delivery to assist with installation and commissioning questions.
Frequently Asked Questions
- Q: What is the difference between TU840 and TU841?
- A: The TU840 and TU841 are both termination units within the AC 800M family but are designed for different module types and connection configurations. Please share your existing module part numbers so our team can confirm the correct termination unit for your application.
- Q: Is the TU840 3BSE020846R1 in stock?
- A: Stock levels vary. Submit an RFQ and we will confirm current availability and lead time within 24 hours.
- Q: Can I replace the TU840 without re-wiring field cables?
- A: Yes. The termination unit is designed to remain in place during module replacement, so field wiring does not need to be disturbed — a key advantage for live-plant maintenance.
- Q: Do you provide export documentation for customs clearance?
- A: Yes. We provide commercial invoice, packing list, and certificate of origin. Additional documentation (e.g., FORM E for ASEAN, EUR.1 for EU) can be arranged upon request.
- Q: What warranty is provided?
- A: Warranty terms depend on the unit condition (new, surplus, or refurbished). Details are specified in the quotation. Contact us for full warranty policy.
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Original Source: https://Konmask.com
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