Description

Product Overview

The ABB TK851 is a high-performance CEX-Bus termination module designed to ensure signal integrity and stability in industrial automation systems, particularly within ABB’s 800xA distributed control system (DCS) and S800 I/O platform. As a critical component in redundant control architectures, this module terminates the CEX-Bus communication line to eliminate signal reflections, ensuring reliable data transmission between adjacent DIN rail-mounted interface units. The TK851 features a 25-pin DB25S female connector with screw fixing, enabling secure and robust connections in harsh industrial environments.

Engineered for mission-critical applications, the TK851 supports hot-swappable operation, allowing maintenance without system shutdown, and is compatible with ABB’s RCU-Link and CEX-Bus extension cables (e.g., TK850) to create seamless communication paths. Its shielded design complies with industrial standards for electromagnetic compatibility (EN 61000) and vibration resistance (IEC 60068-2-6), ensuring stable performance in electrically noisy and mechanically challenging settings. By integrating precision-molded connectors and corrosion-resistant materials, the TK851 minimizes downtime and reduces long-term maintenance costs.

Technical Specifications

Parameter Name	Parameter Value
Product Model	ABB TK851
Manufacturer	ABB
Product Type	CEX-Bus Termination Module
Connector Type	25-pin DB25S female (screw-fixed)
Termination Resistance	100 Ω (integrated)
Shielding	Braided copper shield for EMI/RFI protection
Voltage Rating	50 VDC
Current Capacity	1 A (continuous)
Operating Temperature	-20°C to +60°C
Physical Dimensions	55 x 16 x 50 mm (L x H x W)
Weight	0.04 kg
Mounting Method	DIN rail or panel-mounted
Certifications	CE, UL, CSA

Key Features and Advantages

Signal Integrity Optimization: The TK851’s 100 Ω termination resistor eliminates signal reflections, ensuring high-speed data transfer (up to 10 Mbps) over CEX-Bus without degradation. This is critical for real-time control in power generation and oil refining applications.

Rugged Industrial Design: Constructed with halogen-free, flame-retardant materials and gold-plated connectors, the TK851 resists corrosion, moisture, and extreme temperatures, making it suitable for offshore platforms and mining environments. Its compact size (55 x 16 x 50 mm) allows easy integration into confined spaces.

Seamless System Integration: Compatible with ABB’s 800xA and S800 I/O systems, the TK851 works seamlessly with modules like PM858 processors and TP830 baseplates, enabling scalable redundancy configurations. Its plug-and-play design minimizes installation time and errors.

Cost-Effective Redundancy: By terminating CEX-Bus communication paths, the TK851 eliminates the need for additional interface modules, reducing hardware costs by up to 30% in large-scale systems. Its hot-swap capability further lowers operational downtime.

Applications

The ABB TK851 excels in industries requiring reliable communication in distributed control systems:

Power Generation: Terminates CEX-Bus connections in thermal power plants for turbine control and generator synchronization.
Oil & Gas: Ensures stable data transmission between remote I/O units in offshore platforms and refineries.
Manufacturing: Supports real-time monitoring of robotic arms and conveyor belts in automotive and food processing plants.
Water Treatment: Maintains seamless communication between decentralized control units in wastewater treatment facilities.
Mining: Provides robust signal termination for conveyor systems and crushing equipment in underground and surface mines.

By integrating with ABB’s automation platforms, the TK851 ensures mission-critical processes operate with minimal latency and maximum uptime.

Installation and Maintenance

Installation Preparation:

Mount the TK851 on a 35 mm DIN rail adjacent to the last CEX-Bus device in the network.
Connect the DB25S female connector to the CEX-Bus port of the interface unit, ensuring proper grounding.
Use shielded wiring and secure cable ties to minimize electromagnetic interference.

Maintenance Recommendations:

Monthly: Inspect connectors for corrosion or loose connections, especially in humid environments.
Yearly: Test termination resistance using a multimeter to ensure it remains within ±5% of the rated 100 Ω. Replace the TK851 if deviation exceeds this threshold.
Every 3 Years: Perform a full system diagnostic to verify signal quality and latency.

Product Warranty and Support

ABB guarantees the TK851 against defects in materials and workmanship for 1 year from purchase. This warranty covers repair or replacement of faulty modules, excluding damage from improper installation or environmental factors. Customers benefit from ABB’s global technical support network, including 24/7 remote diagnostics and on-site commissioning services. Extended warranty plans are available for mission-critical applications, ensuring maximum system availability.

Product Information

Brand Model: ABB TK851
Product Name: CEX-Bus Termination Module
Warranty: 1 year
Size: 55 x 16 x 50 mm
Weight: 0.04 kg
Origin: Sweden
Inventory: Spot/Futures
Delivery Time: Goods in stock will be dispatched within 3 days after payment
Order Time: Goods will be dispatched within one month after payment

Contact info

WhatsApp: +86 18030182217
Email: sandydcsplc@gmail.com
Phone: +86 18030182217
Wechat: +86 18030182217
Website: www.xiongbaparts.com

ABB TK851 CEX-Bus Termination Module(XIONGBA)