Description

1. Product Overview

ABB TU810V1 (Part No.: 3BSE013230R1) is a compact 16-channel terminal mounting base (MTU Module Terminal Unit) from the S800 I/O series. It serves as a passive wiring base matched for the AC 800M DCS system. Its main functions include establishing reliable electrical connections between field instrument cables and various analog & digital I/O modules, as well as supporting ModuleBus internal bus daisy-chain transmission and automatic hardware address assignment for I/O modules. It is an essential auxiliary component for distributed remote I/O architecture.

This terminal unit has a maximum withstand voltage of 50V and a rated load current of 2A per channel. It is compatible with all standard S800 I/O modules including AI, AO, DI, DO and DP types. Equipped with a mechanical anti-misplug locking structure, it prevents hardware damage caused by incorrect installation of different types of I/O modules. Adopting standard DIN rail modular mounting, it supports both horizontal and vertical cabinet layout. Featuring excellent EMC performance and wide operating temperature adaptability, it is widely used in DCS systems of process industries such as power, chemical, metallurgy, water treatment and papermaking. Typical applications include I/O wiring configuration for new projects, spare replacement of bases for legacy S800 I/O systems, and control system measuring point expansion renovation.

2. Hardware Structure and Composition

2.1 16-Channel Field Signal Wiring Unit

It integrates 16 independent process signal terminals for connecting analog and digital cables from field devices including pressure, temperature and level transmitters, valve feedbacks, relays and solenoid valves. Two sets of common terminals for process power supply and two sets of 0V reference potential are reserved to support 2-wire and 4-wire instrument power wiring. The terminals accept solid wires ranging from 0.2 to 4.0mm² and stranded wires from 0.2 to 2.5mm², ensuring firm connection to avoid signal disconnection and poor contact faults induced by on-site vibration.

2.2 ModuleBus Internal Bus Daisy-chaining & Address Allocation Unit

A high-speed backplane ModuleBus loop is built inside. It can be daisy-chained to the previous terminal base upward and transmit bus signals to the next TU810V1 base downward to realize chain networking of multiple I/O modules. Unique hardware addresses are automatically assigned to each I/O module in every slot via displacement position signals, eliminating manual DIP switch setting, reducing configuration mismatch risks and enabling the controller to accurately identify each I/O measuring point.

2.3 Mechanical Anti-misposition Locking Unit

Two groups of adjustable mechanical coding lock strips are provided with a total of 36 hardware positioning combinations. Exclusive physical lock positions are configured for different analog and digital I/O modules; only modules with matching codes can be inserted into corresponding slots. It physically prevents wrong insertion of AI, AO, DI and DO modules and effectively avoids hardware burnout caused by short-circuited module power and signal pins.

2.4 DIN Rail Mounting & Earthing Protection Unit

The base features a snap-on DIN rail locking mechanism for easy installation and removal, together with integrated earthing contacts. When mounted on a standard earthed DIN rail, the unit achieves reliable shield earthing to suppress common-mode electromagnetic interference. Made of flame-retardant industrial plastic, it has a compact and lightweight structure with separated strong and weak current wiring areas, suitable for high-density I/O cabinet layout. It is fully backward compatible with bases of the same series and can directly replace legacy terminal units of the same specification on-site.

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3. Technical Specifications

3.1 Electrical Specifications

Rated Withstand Voltage: Max. 50VDC
Rated Current per Channel: 2A; Max. 5A for common process loops
Compatible Cable Specifications: Solid wire 0.2~4.0mm²; stranded wire 0.2~2.5mm²
Bus Type: Built-in ModuleBus backplane daisy-chain bus; passive transmission without external power supply
Compatible I/O Modules: Full range of standard S800 I/O modules such as AI810, AI815, AO810, DI810, DO810, DP820
Number of Channels: 16 independent process signal channels

3.2 Environmental Specifications

Operating Temperature (Horizontal Mounting): 0℃ ~ +55℃; Operating Temperature (Vertical Mounting): 0℃ ~ +40℃
Storage & Transportation Temperature: -40℃ ~ +70℃
Relative Humidity: 5%~95% RH, non-condensing, free of corrosive gas and conductive dust
EMC Compliance: IEC 61000 Industrial Class A anti-interference standard
Protection Class: IP20; for indoor installation only in ventilated and enclosed industrial control cabinets

3.3 Mechanical Specifications

Mounting Method: Standard 35mm snap-on DIN rail mounting, supports both horizontal and vertical installation
Overall Dimensions: W 27mm × D 119mm × H 119mm
Net Weight: Approx. 0.17kg
Enclosure Material: Flame-retardant high-temperature resistant engineering plastic
Optional Accessories: Various S800 series I/O modules, shielded signal cables, DIN earthing rails, terminal marking tags

4. Product Functions and Features

Passive Modular Wiring Design Simplifies On-site Instrument Wiring

No external operating power is required; it acts merely as a passive wiring transition base. The 16-channel integrated terminal layout centrally collects multi-loop field instrument cables for neater wiring compared with discrete terminal blocks, greatly lowering wiring error rates and facilitating later circuit inspection, troubleshooting and measuring point expansion renovation.

Automatic Hardware Addressing + Bus Daisy-chaining Enables Convenient I/O Chain Networking

I/O hardware addresses are automatically allocated via backplane displacement signals without DIP switch or manual software configuration. Multiple terminal bases can be extended by daisy chaining; a single ModuleBus bus can connect multiple TU810V1 units together with matched I/O modules to rapidly deploy large-scale distributed measuring points and shorten system commissioning cycles.

Mechanical Coding Anti-misplug Structure Delivers All-round I/O Hardware Protection

Physical lock strips block insertion of mismatched modules to prevent power short circuits and signal loop breakdown caused by mixed use of analog and digital modules. It is especially applicable to high-density cabinets with various types of I/O devices, reducing risks of man-made hardware damage during on-site installation and maintenance.

Wide-temperature Anti-interference Industrial Design Adapts to Harsh Process Industry Conditions

The flame-retardant sealed enclosure together with shield earthing resists electromagnetic radiation interference from plant frequency converters and high-voltage power cables. Dual mounting orientations fit different cabinet layouts, and the wide-temperature operating capability ensures long-term stable continuous operation in high-temperature, dusty environments such as metallurgical, chemical and thermal power plants.

High-compatibility Standardized Design Facilitates Spare Replacement and System Expansion

It is backward compatible with all compact S800 I/O modules. Legacy terminal bases can be directly replaced without modifying existing field cables, DIN rails or cabinet layout. Hot swapping of compatible I/O modules is supported without interrupting the operation of other measuring points in the same group, guaranteeing non-stop continuous plant production.

5. Applicable Working Conditions and Application Scenarios

Terminal wiring deployment of S800 remote I/O stations for AC 800M DCS systems in petroleum refining, coal chemical and fine chemical industries, realizing centralized wiring of analog and digital measuring points for temperature, pressure, flow, liquid level and other parameters.
I/O wiring matching for auxiliary control systems including boilers, steam turbines, desulfurization, denitrification and water treatment in thermal power plants and waste incineration power plants, as well as dense instrument signal conversion scenarios in local control cabinets.
Mounting base installation for distributed I/O modules in sequence control and interlock protection systems of papermaking, metallurgy and cement production lines, together with signal wiring projects for field equipment such as valves, motors and transmitters.
New construction and technical expansion projects of automatic control systems for municipal tap water and sewage treatment plants, applicable to intensive multi-loop instrument wiring and installation scenarios.

ABB TU810V1 3BSE013230R1 Module Terminal Unit