Feature Interconnection
For connections that run deep
Kevin Canham at Harting explores some of the new developments in PushPull connectors and how this is taking interconnection capability to the next level
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ushPull connectors have been the preferred choice for both device developers and users for years. Reasons for this include the simple, certain and intuitive operating concept, the compact and robust pack- aging with a high protection class (IP 65/67) and the availability of functional inserts for data, signals and power. The incorporation of these functional inserts into the PushPull hoods and housings makes it easy to quickly adapt the connector concepts to chang- ing application areas and markets. One major new development is the integration of USB inserts for USB2.0 Type A and B and even 3.0 Type A. Although the Universal Serial Bus began its career in the market for consumer and office equipment, it is becoming a significant player in the industrial sector. It is the combination of data transmission and power supply in a single hybrid interface that is the major advantage that USB has to offer. This means that many devices need only one interface.
USB inserts integrated into PushPull connectors combine the advantages of USB and PushPull, allowing USB to be used for industrial applications with- out restrictions. In addition, device developers and users can now benefit from a universal product range, from the adapted PCB socket to a system cable suitable for industrial use. Developers of the PushPull USB interface products have paid special attention to simple device integration. Users will find components co-ordi- nated to their particular requirements.
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For example, ready-to-use, pre-assembled PushPull USB panel feed-throughs are available for use in switch cabinets and controllers, such as those found in machine and plant construction. These are available as female-female couplers or in versions with internal connection cables.
USB Interface options
Panel feed-throughs are employed for feeding internal USB interfaces of con- trollers or industrial PCs to the outside for service purposes. Developers use individual components and panel feed-throughs with adaptor PCBs for direct device integration. The panel feed-throughs with adapter PCBs and internal connections to PCB connec- tors can be adapted to the device developer’s requirements for specific projects - by opting for flat ribbon cable, for example.
This form of device integration is preferred when existing device designs for use in harsh environments are packed into housings with a high level of protection – offering an economical and swift solution for device integration in small series and for customised solutions. In the case of longer runs, the most efficient solution is to integrate the interfaces directly onto the main PCB.
In this case, customers have the choice of individual components, such as USB sockets, mounting adaptors and bulkhead-mounted housings. In order to position the interfaces for the power supply, RJ45 and USB devices can be mounted in a row in a compact
Figure 1:
Device integration examples for the Harting PushPull USB interfaces
and visually pleasant manner, and USB sockets with adapters matching the installation dimensions of the RJ45 and power sockets can be placed on the customer PCB.
The PushPull concept is continually being enhanced. The latest step is the integration of 10-position signal inserts. The PushPull Signal connector transmits nominal currents of 5A on 10 contacts with conductor cross-sec- tions up to 0.75mm
2 . To ensure EMC
interference immunity, the contact inserts are fully shielded like RJ45 data connectors, and it is possible to connect shielded cables. Typical application areas for these signal connectors are the transmission of serial bus signal such as Profibus, CAN bus, analogue sensor signals or status messages. PushPull Signal con- nectors can also be used to implement hybrid applications. For example, a part of the mating face can be used to transmit power while other contacts are ready for communication. PushPull Signal connectors are avail- able in the PushPull variant 14 and variant 4 series, as defined by IEC 61076-6-107.
Haring
www.harting.co.uk Enter 207
The Han PushPull variant 14 is the preferred connector for data transmis- sion and for supplying power to peripheral Profinet field devices in accordance with the guidelines of the PNO (Profibus User Organisation) and AIDA (Automation Initiative of German Automobile Manufacturers). In addi- tion to the precisely defined standards for the Profinet data interfaces, further individual signal and data connections are required for the transmission of analogue, digital, bus and low voltage signals. The new PushPull Signal con- nector is the ideal choice for meeting these diverse challenges.
NOVEMBER 2013 Electronics
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