Product Introduction
When industrial automation systems require reliable signal distribution, the ABB TU805 delivers a robust solution. This 16-channel 50V terminal unit is designed specifically for S800 I/O modules DI801 and DO801. The TU805 is a passive unit that efficiently distributes external process power, enabling 2- and 3-wire connections of process signals. Its direct mounting on the I/O module eliminates the need for extra space, streamlining panel layouts.
Technical Specifications Breakdown
The TU805 offers 16 channels with a maximum current of 1 A per I/O channel, ensuring adequate capacity for most field devices. It accepts solid and stranded wire sizes from 0.2 to 1.5 mm² (24-16 AWG), providing flexibility for various wiring standards. The dielectric test voltage is 500 V a.c., confirming robust insulation. Operating temperature ranges from 0 to +55 °C (+32 to +131 °F), with storage from -40 to +70 °C (-40 to +158 °F). The unit meets IP20 protection class according to IEC 60529 and carries CE, UL, and hazardous location certifications (C1 Div 2 cULus, C1 Zone 2 cULus, ATEX Zone 2).
Industry Applications
In process control environments, the TU805 excels at connecting sensors and actuators to S800 I/O systems. For example, in chemical plants requiring hazardous area compliance, the ATEX Zone 2 certification allows safe installation in potentially explosive atmospheres. The 2- and 3-wire connection capability supports both simple switch inputs and more complex transmitter signals, reducing wiring complexity.
Installation & Setup Guidance
Mount the TU805 directly onto the DI801 or DO801 module without additional brackets. Use the two process power terminals for external power input and the 16 distribution terminals for channel wiring. Ensure wire stripping length matches the terminal block specifications. Verify that the ambient temperature stays below 55 °C (131 °F) for reliable operation. The unit is passive, so no configuration is required beyond proper wiring.
Maintenance & Reliability
The TU805 requires minimal maintenance due to its passive design. Periodic inspection of terminal connections and visual checks for corrosion are recommended, especially in environments classified as ISA-S71.04 G3. The unit operates reliably within 5 to 95% non-condensing humidity. Regular inspection and testing according to the manufacturer's safety manual is recommended for hazardous location installations.
Compatibility & Integration
The TU805 is purpose-built for ABB S800 I/O modules DI801 and DO801. It integrates seamlessly into ABB distributed control systems (DCS) and programmable logic controllers (PLC) that support the S800 platform. The terminal unit handles 50V process power distribution, making it compatible with a wide range of field devices.
Selection Guide & Purchasing Advice
Before ordering, verify that your I/O modules are DI801 or DO801 and that the system voltage does not exceed 50V. The TU805K01 kit includes 10 units, ideal for larger installations. For single-unit needs, order the TU805 individually. SpareTechPLC stocks genuine ABB TU805 units with full certification support. Contact our team to confirm current lifecycle status and availability.
Frequently Asked Questions
Q1: What is the difference between TU805 and TU805K01?
A: The TU805K01 is a kit containing 10 pieces of TU805. The TU805 is the individual 16-channel 50V terminal unit.
Q2: Can the TU805 be used with modules other than DI801 and DO801?
A: The TU805 is specifically designed for use with DI801 and DO801 modules. Using it with other modules is not supported by the manufacturer.
Q3: What wire sizes are compatible with the TU805?
A: The terminal block accepts solid and stranded wires from 0.2 to 1.5 mm², equivalent to 24-16 AWG.
Q4: Does the TU805 require external power?
A: Yes, the TU805 distributes external process power via its two process power terminals. It is a passive unit and does not generate power itself.
Q5: What certifications does the TU805 hold?
A: It carries CE, UL 61010-1, hazardous location approvals (C1 Div 2, C1 Zone 2, ATEX Zone 2), marine certification DNV-GL, and RoHS compliance.
