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ABB TK850 Extension Cable/Module
ABB TK850
The TK850 is an expansion cable/module developed by ABB for the CEX (Compact Expansion) bus. It is primarily designed to enable long-distance bus extension and modular connection in the 800xA and System 800xA control systems. When paired with terminals such as the TK851 and TB850/TB851, it facilitates signal transmission either inside a control cabinet or across multiple cabinets.
Key Technical Specifications
- Model: TK850V007 (Common Specification)
- Compatible Bus: CEX Bus (24 V DC-based)
- Cable Type: Shielded twisted pair, supporting 2 × 24 V power supply and signal channels
- Maximum Transmission Distance: Up to 200 m (depending on specific wiring and load conditions)
- Connection Method: Standard CEX terminals (pin or socket type) at both ends, enabling direct plug-and-play operation
- Operating Temperature Range: -20 °C to +60 °C, suitable for industrial environments
- Protection Class: IP20, ideal for internal cabinet installation
Product Features
- Modular Expansion: Leveraging standardized CEX terminals, the TK850 allows for quick plug-and-play connectivity, making it easy to add or remove I/O modules on-site.
- High Reliability: Equipped with shielded twisted pair cables and anti-interference design, it ensures signal integrity and complies with industrial communication standards such as IEC 61850.
- Strong Compatibility: It seamlessly integrates with other ABB CEX components including the TK851, TB850/TB851 and BC810K02, and supports redundant controller connections.
- Simplified Wiring: A single cable delivers both power and signal, reducing wiring costs and space requirements.
- Easy Maintenance: The terminal adopts a plug-and-play structure, enabling quick fault location and replacement.
Structure and Components
- Cable Body: Multi-strand shielded copper wire with an outer PVC/PE insulating sheath.
- Terminal Connectors: ABB standard CEX terminals (pin or socket type) at both ends, which can be directly mated with the terminals of the TK851 and TB850/TB851.
- Protective Sleeve: Optional metal or plastic sleeve is available to enhance tensile strength and protective performance.
Typical Application Areas
- Process Automation: Field bus extension for continuous production lines in industries such as chemical engineering, petroleum and natural gas.
- Power Systems: I/O expansion for distribution automation and substation monitoring cabinets.
- Building Automation: Bus extension for HVAC, security and lighting control systems in large-scale buildings.
- Manufacturing Industry: Modular I/O connection for CNC machine tools and robot control cabinets.
Installation and Maintenance Guidelines
Installation
- Confirm Wiring Path: Determine the cable routing based on the on-site layout, and avoid parallel routing with high-voltage cables to minimize electromagnetic interference.
- Terminal Matching: Select the corresponding TK850 specification according to the terminal type (pin or socket) used to ensure consistency in terminal types.
- Fixed Support: Secure the cable with cable clips or brackets, and maintain a bending radius of not less than 10 × the cable diameter to prevent excessive bending.
- Grounding: If a metal sleeve is used, proper grounding must be implemented to prevent electrostatic accumulation.
Commissioning
- Use ABB-provided CEX bus diagnostic tools (e.g., CEX Diagnostic Module) to check signal integrity, supply voltage and terminal contact conditions.
- Conduct a single-port continuity test before system startup to ensure that each cable segment is free of short circuits or open circuits.
Maintenance
- Regular Inspection: Inspect terminal tightness, sheath integrity, and cable surface for wear or aging every 6 months.
- Replacement Principle: If outer sheath damage or poor terminal contact is detected, replace the corresponding cable segment promptly to avoid total bus failure caused by local faults.
- Spare Parts Management: It is recommended to keep supporting terminals such as the TK850, TB850/TB851 and TK851 in stock on-site for quick replacement.
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Xiamen Xingruijia Import and Export Co., Ltd.
Xiamen Xingruijia Import and Export Co., Ltd. is a high-tech enterprise with years of professional experience in selling spare parts for large-scale imported automation systems, including Distributed Control Systems (DCS), Programmable Logic Controllers (PLC), redundant fault-tolerant control systems and robot systems.
We are mainly engaged in the sales and system integration of spare parts for renowned imported automation brands such as Foxboro, Tricon, Ovation, Motorola, Xycom, ABB, Allen-Bradley, Schneider, GE Fanuc, Yaskawa and Woodward. Thanks to the dedicated efforts of all our staff and the strong support from customers and industry peers, our business has expanded rapidly, covering major regions across China including East China, South China, North China and Southwest China. We have quickly emerged as a rising star in the automation industry. Guided by the tenet that ”creating value for customers is our eternal pursuit”, we have been providing consistent services to every new and existing customer with the business philosophy of ”quality assurance, honest service and timely delivery”.
Our Services
- System Integration: We offer end-to-end services ranging from system design, equipment selection, installation and commissioning to after-sales support.
- Spare Parts Supply: With an abundant inventory of spare parts, we can quickly provide genuine original spare parts to ensure the stable operation of your equipment.
- Technical Training: We provide professional technical training for customers to help them quickly master the operation and maintenance skills of the equipment.
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