3TB170.91 Module Link Terminal

The 3TB170.91 is a professional module link terminal developed by B&R Industrial Automation, specially designed for the SYSTEM 2005 modular automation platform. As a core wiring connection component for rack-based control systems, it is installed on the standard backplane of control racks and serves as the physical connection bridge between internal functional modules and external field wiring. Adopting mature push-in and cage clamp connection technology, this terminal features a compact modular structure, reliable electrical conductivity and excellent mechanical stability. With optimized insulation design and high-strength engineering plastic housing, it delivers outstanding resistance to aging, high temperature and electrical breakdown. The product supports fast wiring and module docking, effectively simplifying on-site wiring work and improving the efficiency of system assembly, debugging and later maintenance. It can adapt to complex industrial environments with vibration, humidity and electromagnetic interference, and is widely used in new automation system construction as well as equipment renovation and wiring upgrade projects across multiple industries.

The official product model is 3TB170.91, an original B&R product manufactured in Austria, and it is produced in strict accordance with the group’s global quality system and international electrical component standards. This terminal block has a total of 20 pins and follows unified mechanical specifications for the SYSTEM 2005 series, achieving full compatibility with all rack modules of the platform. Its protection rating conforms to IP20 as specified by the EN 60529 standard, suitable for indoor installation inside standard industrial control cabinets. The rated voltage is 300 V, and each contact supports a rated current of 10 A, meeting the power and signal transmission requirements of most industrial control circuits. The contact spacing is set to 5.08 mm, which complies with international general terminal layout standards and facilitates standardized wiring and expansion. The internal contact adopts high-quality conductive materials, with a contact resistance of no more than 5 mΩ, ensuring stable electrical transmission. The product supports copper wire connection only and is not applicable to aluminum wires. It matches wire gauges ranging from 0.20 mm² to 1.50 mm², corresponding to AWG 26 to AWG 12, covering common specifications of industrial control cables. Each finished product undergoes strict electrical testing, mechanical durability testing and insulation testing before leaving the factory, and has passed relevant safety and electromagnetic compatibility certifications, which can guarantee long-term stable use in industrial scenarios.

The 3TB170.91 mainly undertakes the functions of electrical connection, signal transmission and circuit expansion within the B&R SYSTEM 2005 control rack. It is responsible for connecting the internal circuits of CPU modules, power supply modules, I/O modules and bus modules to external field cables, realizing the transmission of power signals, control signals and communication signals between the control system and on-site actuators, sensors and other peripheral equipment. The integrated multi-channel pin design can concentrate and arrange multiple wiring points in a limited space, effectively organizing the internal wiring of the control cabinet, avoiding messy lines and reducing the risk of circuit faults caused by wiring confusion.

Equipped with reliable cage clamp and push-in connection mechanisms, the terminal can firmly lock the access cables. It can effectively resist loosening of wiring terminals caused by long-term mechanical vibration on industrial sites, ensuring the continuity and stability of circuit connection. The internal structure is designed with independent isolation between channels, which can reduce crosstalk between different signals and improve the anti-interference ability of the entire control system. In terms of system architecture, this link terminal can be used as a standard matching part for single-rack independent control systems, and can also be used in combination in multi-rack distributed control systems to complete unified wiring and signal interconnection between multiple racks.

This terminal supports convenient on-site wiring and module replacement. Operators can complete cable access and removal without professional tools, which greatly shortens the time for equipment assembly, routine maintenance and fault troubleshooting. As a basic matching component of the SYSTEM 2005 platform, it is an essential part for building complete modular automation control systems, and provides reliable wiring guarantee for the stable operation and subsequent function expansion of the entire system.

The 3TB170.91 adopts high-performance conductive materials and high-insulation engineering plastics. The rated working voltage is 300 V, and the rated working current of each single contact is 10 A, which can meet the load requirements of conventional power circuits and signal circuits in industrial control. The contact resistance is controlled within 5 mΩ, ensuring low loss during electrical transmission. The contact spacing is 5.08 mm, which realizes reasonable isolation between adjacent circuits and avoids short-circuit risks. It is applicable to solid and stranded copper wires with a cross-sectional area of 0.20 mm² to 1.50 mm², and the corresponding American wire gauge ranges from AWG 26 to AWG 12, with strong adaptability to different cable specifications.

In terms of connection performance, the cage clamp and push-in dual connection structure provides stable clamping force. It can maintain a firm connection state under long-term vibration conditions and will not cause poor contact due to vibration. The insulation part has excellent high temperature resistance and electrical insulation performance, which can effectively prevent electric leakage and electrical breakdown. In terms of environmental adaptability, the normal operating temperature ranges from -25°C to +70°C, and it can work normally under a relative humidity of 5% to 95% non-condensing environment. The product has passed vibration and shock tests for industrial equipment, and can adapt to the mechanical environment of various production workshops. The overall structure is durable, with a long service life and low failure rate, supporting 24-hour continuous operation of the system.

When installing and using the 3TB170.91, users need to select industrial copper cables that match the wire gauge range, as well as standard wiring tools and cable accessories that comply with safety specifications. This terminal is fully compatible with standard racks, backplanes and all functional modules of the B&R SYSTEM 2005 series, and can be directly inserted into the reserved slot positions on the backplane for quick installation and fixation. For multi-rack system wiring expansion, dedicated inter-rack connection cables and auxiliary fixing accessories are required to realize signal and circuit interconnection between different racks.

During on-site wiring, it is recommended to use professional wire stripping tools to process cable ends to ensure good contact between cables and terminal contacts. For scenarios requiring circuit identification and management, supporting numbering strips and marking accessories can be equipped to mark each wiring channel, which facilitates daily inspection and fault location. This terminal can be used in combination with power supply modules, CPU modules, digital and analog I/O modules, bus control modules and other components of the 2005 series to form a complete automation control system. For applications with high requirements for electromagnetic compatibility, external shielding accessories and grounding accessories can be configured according to the site conditions to further enhance the anti-interference performance of the circuit.

The 3TB170.91 module link terminal is exclusively applied to all automation control systems built based on the B&R SYSTEM 2005 platform, and is a standard wiring component for single-rack and multi-rack control racks. It is widely used in general machinery manufacturing, automated production lines, packaging machinery, textile machinery, printing and papermaking equipment, material conveying machinery, industrial machine tool control systems, intelligent logistics equipment and food processing machinery and other industrial fields.

Whether it is a small independent control device or a large-scale distributed multi-rack control system, this terminal can provide stable and reliable wiring connection support. With its firm connection, good insulation and strong anti-interference capabilities, it is especially suitable for continuous production equipment that runs for a long time and industrial sites with severe vibration. The standardized modular design unifies the wiring specifications inside the control cabinet, simplifies the overall wiring layout, reduces the difficulty of equipment assembly and later maintenance. It is not only suitable for the wiring construction of new automation projects, but also applicable to the technical transformation, circuit reorganization and wiring system upgrading of old production lines, and can maintain stable working performance in various harsh industrial environments.

The 3TB170.91 is an original genuine product of B&R Industrial Automation. All production processes including material selection, stamping, assembly and testing are implemented in strict accordance with international industrial standards and the company’s internal quality control specifications. Each product undergoes multiple tests such as conduction test, insulation resistance test, clamping force test and vibration test before leaving the factory to ensure that every index meets the design requirements. The product has passed relevant international safety and electromagnetic compatibility certifications, complying with EU electrical safety and EMC standards.

The product adopts high-quality raw materials and sophisticated manufacturing technology. The conductive contacts are wear-resistant and oxidation-resistant, and the insulating housing has the characteristics of high temperature resistance, aging resistance and impact resistance. It can cope with complex industrial conditions such as temperature fluctuation, humidity and electromagnetic interference. B&R has a complete global quality assurance system and after-sales service network, which can provide users with professional technical consultation, installation guidance, wiring suggestions and long-term after-sales support. As a mature wiring accessory that has been widely verified in global industrial sites, the 3TB170.91 is a reliable choice for wiring configuration and system expansion of B&R SYSTEM 2005 series automation systems.