Atlas Copco TC‑4000‑S Controller (Art. No. 8435 6500 00)

The Atlas Copco TC‑4000‑S, with article number 8435 6500 00, is a next‑generation tightening controller engineered for high‑productivity assembly environments. This controller supports a wide array of electric and pneumatic torque tools, providing precise control, comprehensive monitoring, and seamless integration with factory automation. Its compact, scalable design makes it suitable for both standalone workstations and complex multi‑tool systems.

Core Control Features

The TC‑4000‑S is capable of controlling up to 8 tools simultaneously through a modular expansion system. It offers advanced tightening strategies, including soft start, step tightening, and torque/angle hybrid control. The controller supports both incremental and absolute encoders, ensuring accurate angle measurement even in high‑speed applications. It also includes a joint monitoring function that detects cross‑threading, misalignment, and tool wear in real time.

Hardware and Connectivity

The controller is housed in a durable IP54 steel enclosure with a built‑in 4.3‑inch colour touchscreen for local operation. It features a high‑speed backplane that supports hot‑swappable I/O modules. Standard communication includes Ethernet (TCP/IP), Profinet, EtherNet/IP, and Modbus TCP, with optional fieldbus modules available. The TC‑4000‑S also provides multiple USB ports for data transfer and programming.

Technical Specifications

• Supply Voltage: 24 VDC nominal, 18‑30 VDC range

• Power Consumption: 120 W max

• Tool Interfaces: Up to 8, configurable for electric or pneumatic

• Torque Range: 0.1 – 3000 N·m (depending on tool)

• Angle Accuracy: ±0.5°

• Sampling Rate: 5000 Hz per channel

• Memory: 8 GB flash, 512 MB RAM

• I/O Expansion: Up to 64 digital and 16 analog channels

• Operating Temperature: 0 °C to +50 °C

Programming and User Interface

Programming is accomplished via the ToolsTalk TC software, which offers a drag‑and‑drop interface for building tightening sequences. The controller can store up to 500 programs, each with individual parameter sets. The touchscreen HMI allows operators to start/stop cycles, view results, and acknowledge alarms. Multi‑language support is available, and the display can be customised to show only relevant information for each user role.

Data Management and Reporting

Every tightening event is logged with full detail, including torque vs. angle curves. Data can be exported via Ethernet or USB in standard formats. The controller includes a built‑in statistical process control engine, providing real‑time Cp, Cpk, and control chart displays. It also supports automated reporting, generating summary reports at the end of each shift or batch.

Safety and Protection

The TC‑4000‑S includes comprehensive safety features: emergency stop input, motor overcurrent protection, and a safety relay for stopping tools in fault conditions. It complies with ISO 13849‑1 for functional safety and can be integrated with light curtains or two‑hand control systems. All inputs and outputs are galvanically isolated to prevent ground loops.

Integration with Production Systems

Thanks to its open communication architecture, the controller easily connects to PLCs, robots, and MES. It supports OPC UA and MQTT for IIoT applications, enabling remote monitoring and predictive maintenance. The device also features a REST API for custom application development.

Applications

This controller is ideal for automotive powertrain assembly, heavy vehicle manufacturing, wind turbine construction, and any application requiring high‑reliability bolted joints. It is also used in research labs for fastener testing and in maintenance workshops for re‑calibration.

Maintenance and Reliability

The TC‑4000‑S is designed for low maintenance. It has no internal batteries, and all connectors are rated for 10,000 mating cycles. Diagnostic LEDs and system logs help quickly identify issues. The controller supports firmware updates without losing existing configurations.

Benefits for Production

By providing precise control and real‑time feedback, the TC‑4000‑S reduces rework and scrap. Its high throughput and flexible programming enable fast changeovers, supporting just‑in‑time manufacturing. The integrated data logging and analysis tools empower quality engineers to continuously improve processes.

Conclusion

The Atlas Copco TC‑4000‑S (8435 6500 00) is a robust, feature‑rich controller that meets the needs of modern assembly operations. Its combination of performance, scalability, and connectivity makes it a valuable investment for achieving superior joint quality and operational efficiency.