ABB TU401 Terminal Unit

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1. Product Overview

The ABB TU401 Terminal Unit is a terminal module used in ABB industrial automation systems for reliable electrical connections between controllers and field devices, sensors, or actuators. It provides standardized connection interfaces, facilitating field signal wiring, system expansion, and maintenance. The TU401 terminal unit is suitable for ABB DCS, PLC, and distributed control systems (DCS), ensuring reliable signal transmission and easy maintenance.

2. Technical Specifications

• Model: TU401

• Product Type: Terminal Unit

• Function: Provides reliable wiring between controllers and field devices

• I/O Types: Digital or analog signals (depending on configuration)

• Connection Type: Screw terminals or spring terminals

• Electrical Ratings: 24 V DC / 230 V AC (application dependent)

• Max Wire Size: 2.5 mm²

• Operating Temperature Range: –20 ℃ to +60 ℃

• Mounting: DIN rail

• Degree of Protection: IP20

• Standards: IEC 60947-7-1, CE

• Typical Applications: PLC/DCS signal wiring, industrial automation control, process control systems

3. Advantages and Features

1. Reliable Connections
   Ensures stable, secure electrical connections, reducing signal interference and faults.

2. Standardized Interface
   Screw or spring terminal design allows fast wiring and easy maintenance.

3. Modular Design
   DIN rail mountable and flexible for system expansion.

4. Industrial-Grade Reliability
   Operates stably under high temperature, dust, and vibration conditions.

5. Easy Maintenance
   Clear terminal labeling facilitates system commissioning and troubleshooting.

4. Applications

• Industrial automation control systems

• PLC/DCS signal wiring

• Process control and monitoring systems

• Factory automation production lines

• Energy management and building automation

5. Installation and Usage Notes

1. Verify module model and controller interface compatibility before installation.

2. Ensure power is disconnected before wiring to prevent electric shock or short circuits.

3. Connect wires according to terminal labeling to avoid signal confusion or module damage.

4. Ensure DIN rail mounting is secure to prevent loosening from vibration.

5. Regularly inspect wiring and terminal status to ensure reliable system operation.