ABB TU812V1 Module Termination Unit | 16 Channel

TU812V1 S800 I/O Module Termination Unit

The TU812V1 from ABB serves as a compact module termination unit for the S800 I/O system. This passive unit provides 16 signal connections and facilitates field wiring integration. It features mechanical keying to prevent incorrect module insertion and supports efficient ModuleBus distribution.

Key Features and Benefits

• Compact installation using 25-pin D-sub connector for field wiring
• Mechanical keying system prevents insertion of wrong I/O modules
• DIN rail mounting with secure latching device for grounding
• Distributes ModuleBus to I/O modules and subsequent MTUs
• Generates correct address signals for connected I/O modules

Technical Specifications

• Manufacturer: ABB
• Model Number: TU812V1 (Article 3BSE013232R1)
• Unit Type: Compact Module Termination Unit (MTU)
• Voltage Rating: 50 V maximum operating voltage
• Signal Channels: 16 I/O signal connections
• Process Connection: 25-pin male D-Sub connector
• Maximum Current: 2 A per I/O channel, 5 A total process connection

Mechanical Configuration

• Two mechanical keys with six positions each
• Total of 36 different configurations possible
• Mechanical keying only - does not affect electrical functionality
• DIN rail mounting in both horizontal and vertical directions
• Latching device ensures secure mounting and proper grounding

Compatible I/O Modules

• AI810, AI815, AI820, AI830, AI830A, AI835, AI835A, AI845
• AO810, AO810V2, AO815, AO820, AO845, AO845A
• DI810, DI811, DI814, DI830, DI831, DI840, DI880, DI885
• DO810, DO814, DO840, DO880, DP820, DP840

Installation and Mounting

• DIN rail mounting for easy installation and removal
• Horizontal mounting up to 55°C (131°F) ambient temperature
• Vertical mounting up to 40°C (104°F) ambient temperature
• Secure latching mechanism for reliable connection
• Compact design for space-efficient cabinet layout

Environmental Specifications

• Operating Temperature: 0 to +55 °C (+32 to +131 °F)
• Storage Temperature: -40 to +70 °C (-40 to +158 °F)
• Relative Humidity: 5 to 95% non-condensing
• Pollution Degree: Degree 2 according to IEC 60664-1
• Protection Rating: IP20 according to IEC 60529
• Corrosion Protection: ISA-S71.04 G3 compliance

Electrical Safety and Certifications

• CE marked for European market compliance
• Electrical Safety: EN 61010-1, UL 61010-1, EN 61010-2-201
• Hazardous Location: C1 Div 2 cULus, C1 Zone 2 cULus, ATEX Zone 2
• Marine certification: ABS, BV, DNV-GL, LR for maritime use
• EMC compliance: EN 61000-6-4, EN 61000-6-2
• RoHS compliance: EN 50581:2012 environmental standard

Physical Dimensions

• Width: 64 mm (2.52 inches) including connector
• Height: 170 mm (6.7 inches) including latch
• Depth: 64 mm (2.52 inches) including terminals
• Weight: 0.17 kg (0.37 pounds)

ModuleBus Functionality

• Distributes ModuleBus signals to connected I/O modules
• Extends ModuleBus communication to next termination unit
• Shifts position signals for proper I/O module addressing
• Ensures reliable data communication across the bus
• Supports single I/O module configuration

Frequently Asked Questions

• What is the purpose of the TU812V1? It serves as a termination unit for S800 I/O modules with field wiring connections.
• How many configurations are possible? 36 different configurations using two mechanical keys.
• What is the maximum current rating? 2 A per I/O channel and 5 A for the entire process connection.
• Can it be mounted vertically? Yes, but with reduced temperature rating of 40°C maximum.
• What connectors are used? 25-pin male D-Sub connector for process connections.
• Does it support redundant I/O? No, it is designed for single I/O module configuration.

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