PRODUCTS CABLES & CONNECTORS I/O CONNECTORS WITH INTEGRATED SURGE PROTECTION
Highly automated production plants rely on industrial connectors for the supply of energy, the communication of data, and the reliable and efficient transmission of signals from measuring, control and regulation technology. Here, transmission quality depends on the performance of both the key interconnection devices for inputs and outputs in the central electrical
control cabinet, and the protective devices applied within signal circuits. However, unpredictable failures such as those caused by voltage transients in control circuits, or even relatively
small voltage peaks, can have a critical negative impact on plant operation. So, electrical control cabinet designers and builders normally integrate separate DIN-rail mounted surge arrester devices to offer in-line protection to the most sensitive circuits. These, however, require time and wiring effort, and involve extra cost. To address this challenge, HARTING has developed a new approach that saves internal control cabinet space
and enables a potentially more cost-efficient higher density cabinet design. This solution moves the in-line surge protection circuitry out of the cabinet and integrates it directly into the I/O interlinked connector. This is achieved through a new surge-protection module that has been added to the Han-Modular range of connector inserts. As a result, potential overvoltage transients are effectively stopped at the cabinet wall. The HARTING Han Surge Protection module is available in two versions to allow protection for both digital and analogue binary I/O sensor circuits: a ‘common mode’ E-Type asymmetrical voltage type, for binary signals with common ground-like digital circuits; and a ‘differential mode’ symmetrical voltage version, for closed signals like analogue circuits. Both versions have integrated protective circuit designs, as developed by surge protection specialist partner DEHN + SÖHNE’, to ensure total fail-safe operation, independent of the cause of failure within the surge protection module. The transients, which can interrupt signal circuits and destroy electronic devices, are discharged to
ground within the connector via a spring element that makes conductive contact with the Han-Modular hinged frame, which holds the modules in position. For the correct discharging of the signals, it is essential that the frame is connected with the ground.
HARTING
RESIN PROTECTS ELECTRICAL CABLES
3M has launched Scotchcast Epoxy Resin 4GS, an easy-to-use two- part encapsulating resin for the safe and easy installation and protection of electrical cables. This has
enhanced humidity resistance to make application in the presence of water easier. It also has colour-changing properties to provide a clear indication of when the resin is correctly mixed, and a further colour change when fully cured, ensuring a reliable cable joint. The average time for the curing to occur ready for energisation of the cable is 30 minutes. Once fully cured, the resin provides an energised insulation, impact resistance and durability, and premium protection against moisture and atmospheric corrosion. The resin is suitable for electrical
insulation and protection against environmental influences of low voltage electrical joints up to 0.6/1.0(1.2) kV, and mechanical protection of electrical joints up to 20.8/36(42) kV – for indoor, outdoor, underground and submerged applications.
3M
www.3m.co.uk 26 JUNE 2018 | DESIGN SOLUTIONS
www.Harting.co.uk
CABLE-T0-BOARD CONNECTOR RANGE
The latest addition to Harwin’s M40 series are the smallest in the company’s portfolio of cable-to-board connectors. With phosphor bronze contacts that are rated for currents of up to 1A, these lightweight, low profile, 1mm pitch units have been developed for modern electronic designs, where densely populated PCBs are stacked closely together. M40 connectors are available in both
single and double row options, with vertical and horizontal surface mount configurations for the shrouded male headers. Pre-cabled female contacts are available off-the-shelf, with complete cable assembly layouts on request. Supporting 50 mate/un-mate cycles, these components have an insulation resistance of 100MΩ and cover an operational temperature range of -25˚C to +85˚C. These are targeted at industrial
control/monitoring, communications infrastructure, industrial drives and consumer electronics.
Harwin
www.harwin.com
CONTROL AND COMMUNICATION CONNECTIONS
The MU27P connectors from TE Connectivity are designed to ensure reliable control and communication connections between railway locomotives and vehicles. The 27-point plugs and receptacles
(including dummy receptacles) allow a single point in the train to issue up to 27 commands to all or some of the vehicles simultaneously. The connectors convey signals such as door controls and indications, public address, brake applied/released indications, as well as audio and other passenger rail functions. They are designed to accept three
10 AWG leads with all the other leads being 12 AWG or 14 AWG. Silver plating on the crimp contacts
ensures excellent electrical contacts. Different mechanical features built into the design
of each type of plug and receptacle make it impossible to connect one type of plug with a different type of receptacle; and each plug has a ‘shark fin’ that helps retain it in the receptacle and prevents connection interruptions. The units also have a break-away coupling system. Offering high resistance to salt spray, these have an operating range of -40 to 110˚C, a current rating of 30A and are designed for a service voltage of 600V DC.
TE Connectivity
www.te.com
INDUSTRIAL AUTOMATION CABLES HAVE THE NEW BSI CABLE BATCH VERIFICATION KITEMARK
New from Eland Cables are Veriflex, its own brand range of industrial automation cables. Aimed at control, servo and fieldbus applications, these have been tested against British and European standards under the new BSI Cable Batch Verification Kitemark. BSI technical certification expert, Paul Turner, said: “The Cable Batch Verification Kitemark is
applied to products, including the Veriflex SY, CY and YY range of PVC and LSZH control cables, under strict UKAS test parameters and subject to BSI’s rigorous surveillance programme. The range of tests provide third-party assurance that cables meet relevant British and international standards for key safety criteria, making them fit for use in appropriate applications.” Within the range, PVC cables have a three year warranty while LSZH cables have two years. The
Veriflex cable range is available on-next day availability. Eland Cables
www.elandcables.com
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