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Reliable interface in medical devices

03 October 2022

Easy to use, intuitively pluggable, and safe: The Easy Locking Connector from binder is recommended for sensitive homecare applications. Designed to be robust and biocompatible, it meets the requirements for electromechanical connectivity in medical devices.

binder presents the 570 series – the Easy Locking Connector (ELC) for use in medical applications. The cable connector which features snap-in locking and an asymmetric hexagon shape in the mating area stands for high safety in operation as well as for a long service life. 

Biocompatible, non-irritant to skin, and resistant to disinfectants, it is suitable for use in the patient environment. The shock-proof and vibration-resistant ELC is available in 4-, 8-, and 12-pole versions for rated currents of 2A and voltages of 250V and 150V, respectively.

Special requirements in medical environment
The quality and safety of electromechanical connectivity are of vital importance in healthcare. Technical malfunctions, unstable parameters, product failures, or a general lack of reliability directly affect the success of therapies as well as the health or even the life of patients. For connectors, this results in the demand for properties such as contact reliability and signal integrity, but also for ergonomic design, simple and intuitive operation – in the homecare segment by the patient himself – as well as a resilient connection. 

In addition, suitability for hygienically sensitive environments, protection against dust, splash water, and accidental electrical contact are as important as a colour scheme that complies with the design specifications of medical device manufacturers.

Medical-equipment products are subject to the EU Medical Device Regulation (MDR). The framework has been in force since 2021, and transitional provisions remain in force until 2025. 

Manufacturers of medical equipment must register their products and therefore need a large amount of documentation. binder supports its customers in this process by providing the necessary technical documents. In close cooperation with the customers, the company elaborates on which documents are concerned. In addition, binder is certified according to DIN EN ISO 13485 and thus meets the high-quality standards regarding product safety and efficacy that are required in medical engineering.

570 series – simple but reliable
One particular feature of the application in medical devices – in contrast to many industrial uses – is the need to frequently disconnect and reconnect the interfaces. This is because in clinical use, but also in homecare, it is often necessary to exchange and interconnect portable devices. The ELC is therefore designed to endure more than 5,000 mating cycles. 

Mating is intuitive, and blind mating is possible even by non-professionals: the alignment of the plug to the socket is predetermined by an asymmetric hexagon shape in the mating area, which prevents mismating. Snap-in hooks ensure simple but effective locking; the latter is easy for the operator to recognize by the snapped-in hooks.

The ELC cable connector consists of two assemblies that can be simply attached together during assembly and automatically snap into place. The two parts can thereafter only be separated with the aid of a special detachment tool. This prevents unintended disconnection by the user and thus contributes to the safety of the interface.

Protected, rugged, well tolerable
The 570 series ELC is protected to IP54 against contact, dust, and splash water from all directions. The female panel mount connector is designed to provide protection against the ingress of splash water and liquids, as well as accidental electrical contact, even when disconnected. In addition to an O-ring, a flat seal is also available as an alternative for device installation; thus, a recess in the housing is not necessary.

The mechanical resistance of the connector with solder termination was verified by means of shock and vibration tests in accordance with DIN EN 60601-1-11 and by means of a drop test according to DIN EN 60601-1.

Another property relevant to medical equipment is the biocompatibility of the ELC, which has been tested and confirmed by an independent external laboratory in accordance with the DIN EN ISO 10993-5 standard. In addition, the 570 series is DEHP-free (except for the contact body) and thus well tolerated by skin. The connectors are easy to clean and resistant to disinfectants.

The ergonomically designed housing of the ELC is made of plastic (PA66) and available in grey-white, similar to RAL 9002.

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