Description​

The ABB TU811​is a robust base unit designed for ABB’s S800 I/O system,providing secure mounting and electrical connectivity for I/O modules in distributed automation applications.This durable mounting unit ensures reliable interconnection between field devices and control systems,featuring advanced terminal technology and modular design.The TU811​delivers exceptional mechanical stability and electrical performance in demanding industrial environments where continuous operation is critical.

Application Scenarios​

In a chemical processing plant’s distributed control system upgrade,the ABB TU811​base units were deployed to mount S800 I/O modules across 15 process units.The TU811​units provided secure mounting and reliable connections for over 200 analog and digital I/O points in corrosive atmosphere areas.During a plant expansion,the modular design allowed quick addition of new I/O points without system shutdown.The TU811’s vibration-resistant terminals maintained connection integrity despite nearby pump vibrations that previously caused intermittent signal failures.Over five years of operation,the TU811-based I/O system achieved 99.99%availability with zero connection-related failures.

Parameter​

Main Parameters

Value/Description

Product Model

TU811​

Manufacturer

ABB

Product Type

S800 I/O Base Unit

Compatible Modules

All S800 I/O modules

Number of Slots

1 module capacity

Connection Type

Push-in spring terminals

Wire Range

0.5-2.5mm²(AWG 20-12)

Terminal Force

<10N per connection

Isolation Voltage

1500V AC

Current Rating

10A per terminal

Power Bus

Integrated power distribution

Communication

Internal fieldbus connection

Mounting

DIN rail 35mm

Operating Temperature

-25°C to+70°C

Storage Temperature

-40°C to+85°C

Material

Polyamide 6.6(UL94 V0)

Protection Rating

IP20

Dimensions

130mm×110mm×75mm

Weight

0.3kg

Certifications

CE,cULus,ATEX

Technical Principles and Innovative Values​

Innovation Point 1:The TU811​features advanced push-in spring terminal technology that reduces wiring time by 60%compared to screw terminals.The spring mechanism maintains constant contact force,ensuring reliable connections despite vibration and thermal cycling.The direct wire insertion requires no tools for conductors up to 2.5mm²,significantly speeding up installation and maintenance.

Innovation Point 2:Integrated power distribution bus provides redundant power paths to connected modules,enhancing system availability.The TU811’s optimized current-carrying capacity supports maximum module power requirements while minimizing voltage drop across the base unit.

Innovation Point 3:Mechanical coding keys prevent incorrect module insertion,ensuring proper configuration and preventing damage to electronic components.The TU811’s robust polyamide construction withstands harsh industrial environments including exposure to oils,chemicals,and mechanical stress.

Application Cases and Industry Value​

In a water treatment plant’s filter control system modernization,the ABB TU811​base units were implemented to organize S800 I/O points for 20 filter beds.The previous termination system required frequent retightening of screw terminals due to vibration from nearby pumps.After migrating to TU811​base units with spring-clamp technology,maintenance time reduced by 75%and connection-related failures eliminated.The project achieved ROI within 8 months through reduced maintenance costs and improved system reliability.The TU811’s modular design also facilitated future expansion without system modifications.

Related Product Combination Solutions​

TU810​|Basic version base unit

TU812​|Extended version with additional features

AI810​|Analog input module

DI810​|Digital input module

DO810​|Digital output module

CI854​|Communication interface module

SD822​|System power supply

DIN Rail​|Mounting rail accessories

Installation and Maintenance​

Installation Preparation:Before installing the TU811,verify DIN rail straightness and secure mounting.Use appropriate wire gauges and strip lengths(9mm recommended).Ensure all connections are fully inserted and visually confirmed through the transparent housing.

Maintenance Recommendations:Perform annual visual inspection for corrosion or damage.Check wire seating during routine maintenance.Use dedicated release tool for wire removal to prevent spring damage.Keep spare units for critical applications.

Product Guarantee​

We guarantee that every ABB TU811​is a genuine ABB product manufactured to the highest quality standards.Our technical team provides comprehensive support including system design,installation guidance,and troubleshooting services.

Contact us for complete I/O solutions using genuine ABB TU811 base units and S800 I/O modules.

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