ABB TU805K01 16-Channel 50 V Terminal Unit Kit for S800 I/O

Product Overview

When managing distributed I/O in process automation, reliable signal termination is critical. The ABB TU805K01 kit provides a practical solution with 10 pieces of TU805 terminal units designed for the S800 I/O system. Each TU805 is a passive 16-channel, 50 V terminal unit that distributes external process power to DI801 and DO801 modules. This kit simplifies wiring and reduces installation time in control cabinets.

Technical Specifications

The TU805K01 delivers key performance metrics for demanding industrial environments. Each of the 16 channels supports a maximum current of 1 A per I/O channel. The terminal block accepts solid wires from 0.2 to 1.5 mm² and stranded wires from 0.2 to 1.5 mm² (24–16 AWG). Dielectric test voltage is 500 V a.c. Operating temperature ranges from 0 to +55 °C (+32 to +131 °F), with approvals issued for +5 to +55 °C. Storage temperature spans -40 to +70 °C (-40 to +158 °F). The unit measures 86.1 mm wide, 40.5 mm deep, and 40.5 mm high, weighing 0.3 kg. Protection class is IP20 per IEC 60529.

Comparison with Similar Terminal Units

Compared to standard 8-channel terminal units, the TU805K01 offers double the channel density in a compact footprint. While many competitive units require separate power distribution blocks, the TU805 integrates 2 x 2 process power terminals and 2 x 16 process power distribution terminals directly. This eliminates extra components and wiring, reducing overall system cost. The TU805K01 also supports both 2- and 3-wire connections, a feature not always available in basic terminal units.

Industry Applications

The TU805K01 excels in process industries such as chemical, oil and gas, and water treatment. For example, in a chemical plant, the kit connects field sensors and actuators to DI801 and DO801 modules, handling up to 50 V signals. The marine certification (DNV-GL) makes it suitable for offshore platforms and shipboard automation. The hazardous location approvals (C1 Div 2 cULus, C1 Zone 2 cULus, ATEX Zone 2) allow deployment in potentially explosive atmospheres.

Installation and Setup

Mount the TU805 directly onto the I/O module without extra space. Use the terminal block for wiring: strip wires to the appropriate length and tighten screws to the recommended torque. For 3-wire connections, utilize the process power distribution terminals. Ensure the ambient temperature does not exceed 55 °C (131 °F) and maintain relative humidity between 5 and 95 %, non-condensing. No special tools are required beyond standard screwdrivers and wire strippers.

Maintenance and Reliability

Regular inspection of terminal connections and environmental conditions ensures long service life. The TU805K01 is built with corrosion protection per ISA-S71.04: G3, making it resilient in harsh atmospheres. Pollution degree 2 (IEC 60664-1) and overvoltage categories per IEC/EN 60664-1 and EN 50178 provide robust electrical safety. Periodic checks of the dielectric integrity using 500 V a.c. test voltage can verify insulation health. The passive design means no active components to fail, enhancing reliability.

Compatibility and Integration

The TU805K01 is specifically designed for ABB S800 I/O modules DI801 and DO801. It integrates seamlessly into ABB control systems, including AC 800M and similar controllers. The terminal unit supports both 2- and 3-wire field connections, matching standard industrial sensors and actuators. No additional communication protocols are required; the unit simply passes signals between the I/O module and field devices.

Purchasing Advice

Before ordering the TU805K01, verify that your system uses S800 I/O modules DI801 or DO801. The kit includes 10 terminal units, sufficient for multiple I/O points. Check the operating temperature range and hazardous location requirements against your site conditions. BluePLC Industrial offers the TU805K01 with full traceability and support. Contact our team for current availability and any compatibility questions.