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ABB TU846 Complete Kit System 800xA DCS S800 I/O Terminal Mounting Unit

ABB TU846 complete kit is a dedicated terminal base hardware solution customized for ABB S800 I/O modular distributed control system, covering all installation and wiring auxiliary accessories required for cabinet deployment. The core TU846 terminal unit adopts flame-retardant reinforced industrial plastic shell, with built-in multi-layer shielding PCB integrating power bus distribution, signal wiring terminals and passive anti-interference filter circuits.

This base unit realizes mechanical locking and electrical docking with S800 series I/O modules through standardized backplane contacts. The front side is equipped with dense high-reliability screw terminals, supporting direct connection of 4–20mA analog sensors, dry contact digital signals, valve actuators and cabinet auxiliary power lines without additional transfer terminal blocks. Independent signal ground and power ground separation design effectively avoids ground loop interference caused by long-distance field wiring. Built-in RC filter and TVS surge suppression components on each wiring channel suppress lightning surges, frequency converter harmonic noise and motor switching transient signals.

The modular DIN rail clip-on structure supports independent single-unit disassembly without cutting off the whole rack power supply, realizing hot swap maintenance of matched I/O modules and greatly shortening system downtime during equipment failure replacement. The internal bus contact adopts gold-plated conductive terminals to ensure long-term stable electrical connection under vibration and temperature fluctuation working conditions, avoiding poor contact signal loss.

It is fully compatible with all standard S800 I/O cards including AI810, AO810, DI810, DO810, AI830, AO830 series analog and digital modules, perfectly matching System 800xA and AC800M PLC control platforms. The full kit includes original TU846 terminal base unit, complete screw terminal fittings, DIN rail fixing buckles, cable fixing clamps and printed official installation & maintenance manual, ready for direct cabinet installation without purchasing extra wiring accessories.

TU846

Complete Technical Parameters:

Mechanical & Wiring Performance

Matching Object: Single S800 series analog/digital I/O module
Wiring Terminal Type: M3 high-torque screw terminals
Adaptable Wire Specification: 0.5–2.5mm² single-core/multi-core field cables
Terminal Rated Current: 10A per channel, 250VAC insulation rating
Mechanical Lock: Spring buckle fast locking, anti-vibration structure
Ground Design: Independent signal ground & power ground separation layout

Electrical & Anti-Interference Specifications

Internal Bus Interface: Gold-plated backplane contact for S800 I/O bus communication
Built-in Protection: Per-channel TVS surge suppression + RC low-pass filter
Insulation Withstand Voltage: 2000V AC between signal circuit and shell ground
EMC Compliance: IEC 61000-6-2 industrial anti-interference standard
Bus Power Distribution: Supports 24VDC auxiliary power transmission for I/O modules

Mechanical & Environmental Specifications

Mounting Method: Standard 35mm DIN rail clip-on installation
Overall Dimension: 125mm × 72mm × 58mm
Single Unit Net Weight: 0.18kg; Full Kit Total Weight: 0.35kg
Continuous Operating Temperature: -20℃ ~ +65℃
Storage Temperature Range: -40℃ ~ +85℃
Ambient Humidity: 5%–95% non-condensing
Shell Material: V0 grade flame-retardant reinforced plastic
Protection Grade: IP20 when fully installed inside control cabinet
Safety Certifications: CE, UL, RoHS certified
MTBF: ≥120,000 hours industrial reliability rating

Compatible Equipment & Matching Software

Matched I/O Modules: S800 AI810, AO810, DI810, DO810, AI830, AO830 series all standard I/O cards
Upper Control Platform: ABB AC800M PLC, System 800xA DCS
Commissioning Software: ABB Control Builder M PC configuration tool
Rack Compatibility: S800 standard 8-slot / 16-slot I/O rack

TU846

Main Features & Competitive Advantages:

Core Features

Special single-slot terminal base for all mainstream S800 analog & digital I/O modules, universal compatibility
High-reliability M3 screw terminals, support multi-specification field sensor and actuator wiring
Independent dual ground separation design, eliminate ground loop signal distortion
Built-in per-channel surge suppression and filter circuits, outstanding on-site anti-EMI capability
Gold-plated backplane bus contacts, anti-oxidation and anti-vibration long-term stable connection
DIN rail modular clip-on design, realize hot swap maintenance of matched I/O modules
V0 flame-retardant plastic shell, high safety for high-temperature chemical and power plant cabinets
Compact integrated layout, reduce extra transfer terminal occupation inside control cabinets
Full factory continuity and insulation test for each unit, zero hidden wiring contact faults
Standard universal spare part, fully interchangeable with all batches of TU846 terminal bases

Key Advantages

All-in-one Complete Kit: Equipped with full terminal screws and installation buckles, one-stop procurement saves accessory matching time
Strong Signal Stability: Integrated multi-stage anti-interference design ensures accurate analog/digital signal transmission in heavy industry sites
Low Maintenance Cost: No consumable parts inside the base unit, minimal routine inspection requirements
Ultra-Wide Compatibility: Matches full range of S800 I/O modules and System 800xA DCS, ideal for old DCS cabinet renovation
Harsh Environment Adaptability: Wide temperature range and flame-retardant shell adapt to power, chemical, metallurgy and offshore control cabinets
Global Export Certification: CE & UL safety certification, meet overseas process automation project standards
Cabinet Space Saving: Integrated wiring base avoids additional external terminal blocks, simplify internal cabinet layout
Fast On-Site Installation: Spring quick-lock structure, rapid fixing on DIN rail without complicated tools

Application Fields:

Power Generation Industry DCS Control

Thermal power plant System 800xA boiler, turbine auxiliary parameter monitoring I/O rack
Hydropower station unit water level, flow, temperature signal acquisition cabinet
Biomass & gas turbine distributed power station S800 I/O terminal base replacement

Chemical & Petrochemical Plants

Refinery reactor pressure, temperature analog signal wiring terminal unit
Chemical pipeline valve, pump digital interlock control S800 terminal base
Explosion-proof cabinet auxiliary DCS I/O wiring fixing base

Metallurgy & Heavy Industry

Steel rolling mill fan, water pump frequency conversion parameter collection DCS terminal unit
Mine ventilation, mineral conveying equipment digital signal wiring base

Oil & Offshore Engineering

Offshore platform process control System 800xA I/O terminal mounting unit
Coastal oil gas processing plant anti-corrosion DCS cabinet wiring base

Water Treatment & Environmental Protection

Sewage plant pH, dissolved oxygen analog sensor signal terminal base
Waste incineration furnace temperature, flue gas monitoring S800 I/O base

Automation Retrofit & Renovation Projects

Direct replacement of aging terminal bases of old ABB S800 I/O racks
Upgrade scattered discrete terminal wiring to standardized TU846 integrated terminal base layout

FAQ:

Q1: What accessories are included in the ABB TU846 full complete set?

A1: The full kit includes original TU846 terminal base unit, complete M3 terminal screw fittings, DIN rail fixing buckles, cable fixing clamps and printed official installation & operation manual, all accessories ready for direct cabinet DIN rail installation.

Q2: Which ABB I/O modules can TU846 match?

A2: It is a universal single-slot terminal base for all standard S800 series I/O modules, compatible with AI810, AO810, DI810, DO810, AI830, AO830 and other mainstream analog/digital I/O cards under System 800xA DCS.

Q3: Can the matched S800 I/O module be hot swapped on TU846?

A3: Yes, the TU846 base supports hot plug of the corresponding I/O module, single module replacement without cutting off the whole I/O rack power supply to avoid system wide shutdown.

Q4: What wire specifications do TU846 screw terminals support?

A4: The M3 screw terminals adapt to 0.5mm² ~ 2.5mm² single-core or multi-core field cables, covering most industrial sensor and actuator wiring standards.

Q5: Does TU846 have built-in anti-interference protection circuits?

A5: Each signal channel is equipped with independent TVS surge suppression diode and RC low-pass filter, effectively suppress converter harmonic, lightning surge and motor switching interference signals.

Q6: What installation mode does TU846 adopt?

A6: Standard 35mm DIN rail clip-on installation with spring quick-lock buckle, convenient disassembly and maintenance inside all standard DCS control cabinets.

Q7: What commissioning software is used for System 800xA configuration matching TU846?

A7: Official ABB Control Builder M PC software, supporting I/O module address configuration, signal channel parameter setting and rack diagnostic monitoring.

Q8: What is the continuous stable operating temperature range of TU846?

A8: Continuous stable operation range: -20℃ ~ +65℃; storage temperature range: -40℃ ~ +85℃, adapting to various industrial control cabinet temperature environments.

Q9: Is the shell of TU846 flame retardant?

A9: The shell is made of V0 grade flame-retardant reinforced plastic, which meets high safety requirements for chemical plant, power plant and other high-temperature control cabinet application scenarios.

Q10: Can TU846 directly replace old batches of the same model terminal base?

A10: 100% plug-and-play interchangeable. TU846 is unified factory standard version, no wiring adjustment or rack program modification required during replacement.

Do you provide global shipping services?

Yes. We have local distribution centers on all continents, which can quickly transport parts to any corner of the world.

2. What payment methods and currencies do you accept?

To make your purchasing process as simple as possible, we offer multiple payment methods including bank transfer, check, and PayPal. Meanwhile, we also accept most mainstream credit and debit cards, such as Visa, Mastercard, and American Express. We can accept payments in most major currencies worldwide, but we recommend using US dollars (USD), British pounds (GBP), or euros (EUR) as a priority. Payments in other currencies may incur additional fees. All transactions are securely processed by HSBC Bank and HSBC Merchant Services.

How many parts do you currently have in stock?

We have a vast inventory of thousands of new, refurbished, and outdated automation components, including products from well-known manufacturers such as ABB and Schneider. If you cannot find the required parts, please do not worry. We work closely with a global network of professional suppliers to provide you with tailored quotes even if the part is not listed on our website.

Who can I contact if I encounter any problems?

Our experienced customer service team will handle any issues after you place your order.