ABB TU835V1 MTU Module: 8-Channel I/O Termination Unit for AI810, AI815, AI845

Product Introduction

When you need reliable signal distribution and address generation for your ABB I/O modules, the TU835V1 MTU delivers. This extended-type terminal block unit supports up to 8 I/O channels, each rated for a maximum voltage of 50V and a maximum current of 2 A per channel. The TU835V1 distributes the ModuleBus to the connected I/O module and to the next MTU in the chain, while shifting outgoing position signals to generate the correct address. Designed for single I/O configurations, it works seamlessly with AI810, AI815, and AI845 modules.

Technical Specifications Breakdown

The TU835V1 offers key specs that matter in industrial automation. Each I/O channel handles up to 2 A, while the process connection supports up to 8 A. The unit accepts solid wires from 0.2 to 4 mm² and stranded wires from 0.2 to 2.5 mm² (24–12 AWG), with a recommended torque of 0.5–0.6 Nm and a stripping length of 7 mm. Dielectric test voltage is 500 V a.c. Operating temperature ranges from 0 to +55 °C (+32 to +131 °F), with storage from -40 to +70 °C (-40 to +158 °F). The protection class is IP20 according to IEC 60529, and the unit weighs 0.26 kg (0.57 lbs). Dimensions are 126 mm (5 in.) width including connector, 64 mm (2.52 in.) depth including terminals, and 110 mm (4.3 in.) height.

Industry Applications

In process control environments, the TU835V1 excels at connecting field signals to ABB I/O modules. For example, in a chemical plant, it distributes transducer power and signal connections for up to 8 channels, with process voltage connected to two individually isolated groups. This setup reduces wiring complexity and improves signal integrity. In marine applications, the unit holds certifications from ABS, BV, DNV-GL, and LR, making it suitable for shipboard automation where reliability under harsh conditions is critical. The mechanical keying feature prevents insertion of the wrong I/O module, saving time during installation and maintenance.

Installation & Setup Guidance

Mount the TU835V1 on a standard DIN rail. The mechanical latch locks the unit securely, and you can release it with a screwdriver for easy removal. Use the two mechanical keys to configure the MTU for different I/O module types—each key has six positions, offering 36 total configurations. This is purely a mechanical setup and does not affect functionality. Connect field signals and process power using the terminal block, ensuring wire sizes and torque meet the specified ranges. The unit supports mounting in both directions, with a maximum ambient temperature of 55 °C (131 °F).

Maintenance & Reliability

To ensure long-term reliability, inspect the TU835V1 periodically for signs of corrosion or damage. The unit features corrosion protection per ISA-S71.04: G3 and operates in pollution degree 2 environments (IEC 60664-1). Each channel includes a fused transducer power terminal to protect against overcurrent. The latching device to the DIN rail provides grounding, enhancing safety. With a wide operating temperature range and non-condensing humidity tolerance of 5 to 95%, the TU835V1 is built for continuous industrial use.

Compatibility & Integration

The TU835V1 integrates directly with ABB I/O modules AI810, AI815, and AI845. It connects to the ModuleBus and distributes signals to the I/O module and subsequent MTUs. The unit supports single I/O configurations and provides 16 process connections: 8 for I/O channels (2 terminals per channel) and 4 for process power plus 4 for process power (0V). It meets EMC standards EN 61000-6-4 and EN 61000-6-2, and electrical safety standards EN 61010-1 and UL 61010-1. For hazardous locations, it carries C1 Div 2 cULus, C1 Zone 2 cULus, and ATEX Zone 2 certifications.

Selection Guide & Purchasing Advice

Before ordering the TU835V1, verify that your I/O module is compatible (AI810, AI815, or AI845). Confirm the required number of channels—up to 8 per unit—and ensure your system uses single I/O configurations. The article number is 3BSE013236R1. For current lifecycle status and availability, contact BluePLC Industrial. We stock this ABB MTU and can advise on replacement options if needed. Trust BluePLC Industrial for genuine industrial automation parts and expert support.