ABB TK851 CEX - Bus Terminal Module

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1. Product Overview

The ABB TK851 CEX Bus Terminal Module is a bus terminal module used in ABB industrial automation systems. It provides expansion and connection for distributed control system (DCS) field buses. The module supports high-speed, stable data communication and is compatible with ABB and third-party controllers, ensuring reliable signal and data transmission. The TK851 CEX enables flexible, modular, and scalable automation network design in complex industrial environments.

2. Technical Specifications

• Model: TK851 CEX

• Product Type: Bus Terminal Module

• Function: Expands bus interfaces to enable communication between controllers and field devices

• Bus Type: CEX Bus (compatible with ABB bus protocol)

• Supported Modules: Digital input, digital output, analog input/output modules

• Data Transfer Rate: Up to 12 Mbps (typical)

• Communication Interface: Bus interface with hot-swappable support

• Power Supply: 24 V DC

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

• Mounting: DIN rail

• Degree of Protection: IP20

• Standards: Compliant with industrial automation and electrical safety standards

• Typical Applications: Industrial automation, process control, distributed control systems (DCS)

3. Advantages and Features

1. High-Speed and Reliable Communication
   Supports up to 12 Mbps bus transfer rate, ensuring real-time control.

2. Modular Design
   Easy to expand and combine; modules can be quickly added or replaced as needed.

3. Strong Compatibility
   Works with ABB controllers and various fieldbus devices for flexible system integration.

4. Easy Installation and Maintenance
   DIN rail mounting with hot-swap support reduces system downtime.

5. Industrial-Grade Reliability
   Operates reliably under typical industrial temperature and environmental conditions.

4. Applications

• Industrial automation and control systems

• Distributed Control Systems (DCS)

• Process control systems

• PLC expansion module connection

• Production line automation and monitoring systems

5. Installation and Usage Notes

1. Verify module model and bus compatibility with the control system before installation.

2. Ensure the module and controller are powered off before connecting the power supply.

3. Observe bus direction and module polarity when wiring to avoid communication faults.

4. Install the module in a well-ventilated control cabinet to prevent overheating.

5. Regularly inspect bus connections and module status to ensure long-term reliable operation.