Supplement: Interconnection
The IP40 circular connector is found in pulse oximeters and respiratory monitoring instruments. Photo: binder
The IP67 snap-in series 720 and 620 with user-friendly snap-in locking. Photo: binder
the application criteria mentioned above and are specifically designed for clinical use and home healthcare. The products feature particularly easy-to-handle and intuitive locking techniques like the snap-in mechanism: for instance, binder’s miniature series 720, proven in magnetic resonance imaging (MRI), infusion pumps, and muscle massage devices. The plastic connectors with pin counts: 3, 5, 8, and 12, meet the IP67 protection standard and are biocompatible according to ISO 10993-5. In scenarios where space is particularly limited, the smaller series 620 is recommended, also with snap-in locking. The device is available with three, four, five, or eight pins and is biocompatible, IP67- protected, and has been implemented as an interface in devices for the treatment of sleep apnoea, LED red light therapy, and ventilators. In less critical environments, the subminiature snap-in series 719 is an appropriate choice. Pulse oximetry, respiratory monitoring, non-remote patient monitoring, and diagnostic tools for heart anomalies are among the applications of this technology in the field of medical device technology. The series is available in plastic housings and with pin counts of 3, 4, and 5.
Innovative locking: ELC and NCC Meeting the demands of many medical technology OEMs, binder engineers have developed a snap-in system with latching hooks that can be connected blindly and guarantees more than 5,000 connection cycles. The Easy Locking Connector (ELC) from series 570 meets IP54 protection criteria when connected; when unconnected, the flange socket is protected against the ingress of liquids and splash water, as well as accidental electrical contact.
The bayonet NCC (Not Connected Closed) from series 770 is another high-protection medical interface in binder’s portfolio. The NCC with bayonet locking mechanism meets IP67 protection when connected; a flange version also achieves IP67 when unconnected. Users can also rely on more than 5,000 connection cycles.
Both products are based on biocompatible materials and are available with pin counts of 4, 8, and 12 (ELC) or 8 (NCC).
Conclusion: more custom solutions in the future
Electrical interfaces for medical technology are characterized by advancements in
Designed for secure blind connection and IP54 protection is the Easy Locking Connector of series 570. Flange connectors of the NCC series 770 with bayonet locking meet IP67 protection even when unconnected. Photo: binder
materials and miniaturization, as well as secure, robust signal transmission. Design improvements ensure intuitive operation and reliable use under clinical conditions and in home care. In the future, customized solutions will play an increasingly important role in meeting OEM customers’ requirements for medical devices tailored to specific patient groups.
Standards for medical technology interfaces
Medical connectors must comply with safety requirements, such as those of IEC 60601-1, to ensure electrical safety, insulation, and grounding. Resistance to shock and vibrations according to DIN EN 60601-1-11, as well as rough handling per DIN EN 60601-1, is especially relevant for portable devices.
Medical device interfaces must also meet industry standards like ISO 13485, which prescribes special measures for quality management. The goal is to ensure that connectors are manufac- tured and tested according to recog- nized best practices.
If the connector comes into contact with the body, biocompatibility testing is legally required. Evaluation is based on various test procedures, including the cytotoxicity test according to DIN EN ISO 10993-5. This test examines whether a product can damage or inhibit the growth of tissue or cells. Fibroblasts (connective tissue cells) are placed on the product or an extract of the product and incubated for several days. The assessment of cytotoxicity is based on the cell death rate.
Patient monitoring in a clinical environment requires high-performance and reliable device connectivity. These devices should feature intuitive controls and be easy to set up. Photo: Kiryl Lis/Adobe Stock
www.cieonline.co.uk https://www.binder.co.uk/ Components in Electronics February 2025 27
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