HELUTEC® connectors – Solutions for increased motor productivity

1.1 What are HELUTEC connectors?

HELUTEC connectors are a dedicated industrial connector range from HELUKABEL, designed to provide fast, safe, and reliable connections between power cables, signal cables, or data cables and industrial equipment, motors, and machinery. HELUTEC is specifically developed for automation, drive technology, robotics, servo motors, and modern production lines, where high durability, effective EMC protection, and short installation times are critical.

A key advantage of HELUTEC connectors is their plug-and-play design, optimized for quick assembly. This reduces installation time, minimizes wiring errors, and enables easy replacement during maintenance. As a result, HELUTEC connectors are ideally suited for manufacturing environments that aim to minimize downtime and maximize operational efficiency.

Learn about the characteristics, functions, and applications of electrical cable connectors

1.2 Applications of HELUTEC connectors

HELUTEC connectors are widely used across a broad range of industrial applications, including:

• Servo motor and drive systems
• Automation machinery and industrial robotics
• Factory production and assembly lines
• Industrial electromechanical equipment
• Systems that require quick replacement and easy maintenance

1.3 Key advantages of HELUTEC connectors

• Compact design – optimized for limited installation space: HELUTEC connectors are designed to maximize space savings, making them ideal for equipment with compact dimensions and low mounting heights.

• Fast installation with SPEEDTEC locking system and plug-and-play design: Thanks to the SPEEDTEC quick-locking technology combined with a plug-and-play concept, HELUTEC connectors enable fast, secure, and precise connections with simple installation steps. This significantly reduces installation time and minimizes the risk of wiring errors.

• Tool-free assembly with innovative crown clamp technology: HELUTEC connectors feature an intelligent crown clamp mechanism that allows completely tool-free assembly.

• Multi-functional connectivity within a single connector housing: One of the key strengths of HELUTEC is the ability to connect power, signal, and data - either individually or combined within a single connector. This helps to reduce the number of connectors required and simplify overall system design

• Broadest hardware portfolio – suitable for all connectivity philosophies: HELUTEC offers a wide range of hardware solutions that support virtually all motor connectivity concepts used today, including: Traditional designs with two or three separate cables, One Cable Technology, Centralized or daisy-chain connection architectures. This flexibility allows HELUTEC connectors to be easily integrated into new systems or retrofitted into existing installations.

• Compatibility with common motor feedback protocols: HELUTEC connectors are compatible with most widely used motor feedback and communication protocols on the market, such as PROFINET, EtherCAT, CAN bus, and DRIVE-CliQ…

2.1 Product range

The HELUTEC connector portfolio is specifically designed for motor, drive, and industrial automation applications and includes the following categories:

• Power connectors: Including series 912, 915, 917, 923, 932, 940, and 958, these connectors are designed for high power transmission, ensuring secure, safe, and durable connections even in harsh industrial environments.
• Signal connectors: Consisting of series 615, 617, 623, and 627, these connectors meet the requirements for stable signal transmission and effective EMC protection in motor control and feedback systems.
• Hybrid connectors: The 723 and 740 series allow power, signal, and data to be combined within a single connector, helping to optimize installation space and simplify overall system design.

3.1 Advanced HELUTEC connector system – Fast locking, secure Connection, superior vibration resistance

The HELUTEC system is an advanced quick-locking connector solution that delivers high safety and stability while significantly reducing installation time and costs. Its vibration-resistant locking mechanism has been perfectly optimized for M17, M23, and M40 connector sizes, and is applied across multiple product lines such as HELUTEC series 617, 917, 623, 723, 923, and 940.

HELUTEC angled connectors can be flexibly combined with the HELUTEC locking system or with standard coupling nuts, ensuring full backward compatibility with existing connector systems. A secure connection is achieved simply by sliding the connector into place and applying a slight rotation. This patented technology guarantees long-term reliability in demanding industrial environments.

3.2 Patented quick-lock design for HELUTEC series 615/915

The HELUTEC 615/915 series has been specifically developed for applications with very limited installation space. In confined areas, the user only needs to pre-tighten the preloaded coupling nut and then slide the connector into the locking position.

For disconnection, a small rotation (1/4turn) combined with a gentle pull is sufficient to safely release the lock, effectively preventing accidental loosening caused by vibration. This mechanism provides outstanding vibration resistance and is a patented, purpose-designed solution for HELUTEC cable connectors in the 615/915 series.

3.3 Freely customizable connectors

HELUTEC connectors offer a high level of customization to meet specific application requirements. During assembly, the connector housing and the metal shell are permanently bonded and cannot be separated, providing a high degree of tamper resistance - an attribute typically associated only with fully over molded connector designs.

This design enables:

• Compatibility with most commercially available cables
• No limitation on cable length
• Suitability for both standard screw connections and patented quick-locking systems

In addition, HELUTEC connectors support a wide range of pin layouts, meeting the majority of technical requirements in modern industrial applications.

Discover HELUCHAIN SYSTEMS solutions with 3 assembly levels

3.4 Outstanding temperature resistance

HELUTEC connectors are engineered to operate reliably across an exceptionally wide temperature range, from –50°C to +130°C. This makes them particularly suitable for applications in harsh climatic conditions where high reliability is essential. Both electrical and mechanical performance remain stable, even in the smallest connector sizes.

3.5 IP66 / IP67 & IP69K protection classification – Optimized for wet and hygienic industrial environments

Most HELUTEC cable connectors comply with IP66 / IP67 protection ratings, ensuring:

• Resistance to high-pressure water jets
• Protection against temporary immersion in water
• Effective sealing against dust and moisture

For demanding applications such as wet environments, steam exposure, or high-pressure wash-down processes, selected connectors can additionally be certified to IP69K. To achieve this rating, the cable clamp is precisely matched to each specific cable type and combined with a robust metal housing featuring integrated EMC shielding. This design ensures safe and reliable operation even under the harsh conditions of industrial hygiene environments.

3.6 IP68 – Reliable long-term underwater operation

Special connector series such as HELUTEC 615 / 915 have been tested and proven for long-term underwater operation, with verified test conditions including:

• Continuous immersion for approximately 120 hours
• Water depth of 15 meters
• Pressure up to 1.5 bar

Throughout the entire test duration, the connectors operated reliably without any functional degradation, achieving IP68 certification. This makes the HELUTEC 615 / 915 series an ideal solution for applications involving prolonged submersion or high-pressure underwater environments.

HELUTEC power connectors of the 915 / 917 / 923 / 932 / 940 / 958 series are specifically designed for high-power drive systems where exceptional mechanical robustness, stable power transmission, and maximum operational safety are required. These connectors are an ideal solution for servo motors, heavy-duty motors, spindle drives, and high-speed rotating applications.

HELUTEC signal connectors of the 615 / 617 / 623 / 627 series are designed for applications that require stable, flexible, and secure connections, particularly in space-constrained installation environments. They are an ideal solution for systems that demand high reliability in control and monitoring signal transmission.

5.1 Key features of HELUTEC signal connectors - SERIES 615 / 617 / 623 / 627

• Optimized for very low voltage and precise signal transmission: Signal connectors in the 617, 623, and 627 series are specifically designed for very low voltage applications, making them ideal for control signals, motor control, monitoring, and feedback systems, ensuring stable and reliable operation.

• Wide range of contact configurations – application-specific flexibility: HELUTEC offers various multi-pin insulation bodies, supporting different connector types such as plugs (cable connectors), couplings, and flush-mounted / bulkhead connectors, allowing flexible adaptation to specific application requirements.

• Reliable connections in confined installation spaces: With a compact yet robust design, HELUTEC signal connectors perform reliably even in control cabinets, high-density mechatronic systems, and equipment with limited installation space.

HELUTEC hybrid connectors of the 723 / 740 series are high-performance integrated connection solutions that enable the simultaneous transmission of power, signals, and high-speed data within a single connector

6.1 Key features of HELUTEC hybrid connectors - SERIES 723 / 740

• Integrated high-speed data transmission with bus module: HELUTEC series 723 is equipped with a separately shielded data element, ensuring stable, high-speed data transmission with excellent EMC protection.

• 6 signal contacts combined with one Quadrax element: This configuration supports Industrial Ethernet (CAT 5) and enables real-time data transmission for modern control systems.

• Compatibility with a wide range of fieldbus systems: Including Profibus, Profinet, CAN bus, Interbus, DeviceNet, EtherCAT, and AS-Interface (ASI)

• Ready-to-assemble Ethernet design with independent shielding: This opens up new application possibilities in advanced automation systems

• Outstanding electrical performance for modern servo applications: In daisy-chain configurations for decentralized servo motor control, HELUTEC hybrid connectors can operate at voltages of up to 850 VDC. Despite the compact M23 size, they support currents of up to 30 A and cable cross-sections of up to 4.0 mm²

Learn about HELUKABEL's fieldbus systems and bus cables

6.2 Applications of HELUTEC hybrid connectors - SERIES 723 / 740

With its outstanding technical performance, multiple configuration options, and ultra-fast high-speed data transmission, the HELUTEC hybrid connectors of the 723 / 740 series are regarded as next-generation connection solutions for applications such as:

• Industrial automation
• Robotics and servo motor systems
• Decentralized control systems
• Applications requiring power, signal, and data transmission within a single connector