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ABB TU840 Redundant MTU Module | 3BSE020846R1

Name: ABB TU840 3BSE020846R1 Redundant MTU Module | S800 I/O System
Brand: ABB
SKU: 3BSE020846R1
Price: 676.00 CNY
Availability: InStock

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SKU: 3BSE020846R1 DCS Distributed Control Systems ABB

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Original ABB 3BSE020846R1 Input Module - Industrial Retrofit Component

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SKU3BSE020846R1
CategoryDCS Distributed Control Systems
BrandABB
SupportAvailability, lead time, condition, and shipping coordination

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ABB TU840 Redundant MTU Module – Reliable Dual ModuleBus Termination

The ABB TU840 (3BSE020846R1) is a high-performance redundant Module Termination Unit designed for mission-critical S800 I/O applications. This robust terminal unit provides dual optical ModuleBus modem termination, ensuring uninterrupted communication and maximum system uptime in demanding industrial environments.

Technical Specifications

Model Number: 3BSE020846R1
Product Series: ABB S800 I/O System
Function: Redundant Module Termination Unit (MTU)
Communication: Dual Optical ModuleBus Interface
Redundancy: Full redundant architecture for high availability
Operating Temperature: -40 °C to +70 °C
Power Supply: 24 VDC nominal
Mounting: DIN rail compatible
Weight: 0.45 kg

Key Applications

The TU840 redundant MTU excels in process automation scenarios requiring fault-tolerant I/O communication:

Oil & gas production and refining facilities
Chemical processing plants with safety-critical controls
Power generation and distribution systems
Water treatment and municipal infrastructure
Manufacturing lines demanding zero-downtime operation

Solution Benefits

Implementing the ABB TU840 delivers measurable operational advantages. The redundant optical ModuleBus architecture eliminates single points of failure, while hot-swappable design enables maintenance without process interruption. Seamless integration with ABB AC 800M controllers and S800 I/O modules reduces engineering time and commissioning costs.

Related Products

Product	Description	Link
ABB TB840A	ModuleBus Cluster Modem (3BSE037760R1)	View Product
ABB TU845	Redundant Terminal Block (3BSE021447R1)	View Product
ABB CI820V1	S800 Redundant Communication Interface (3BSE025255R1)	View Product

Frequently Asked Questions

Q: Is the TU840 compatible with non-redundant S800 configurations?
A: Yes, the TU840 can operate in both redundant and non-redundant system architectures, though its primary design purpose is redundant applications.

Q: What cable type is required for optical ModuleBus connections?
A: Use ABB-approved multimode fiber optic cables (50/125 ¼m or 62.5/125 ¼m) with LC connectors for reliable communication.

Q: Can I hot-swap the TU840 during operation?
A: In redundant configurations, one MTU can be replaced while the system remains operational, ensuring continuous process control.

Q: What diagnostic features does the TU840 provide?
A: LED indicators show power status, ModuleBus communication health, and fault conditions for rapid troubleshooting.

Warranty & Support

All ABB TU840 modules include a comprehensive 12-month warranty covering manufacturing defects and material failures. Technical support and genuine ABB replacement parts are available worldwide through our authorized distribution network.