New Danfoss VLT® Decentral Drive E cient, reliable and powerful
New Danfoss VLT® Decentral Drive E cient, reliable and powerful
New Danfoss VLT® Decentral Drive E cient, reliable and powerful
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MECHANICAL AND LINEAR<br />
Magnetic clutches boost slip<br />
torque to 12Nm<br />
Mayr has exp<strong>and</strong>ed its Robacontitorque<br />
range of permanent<br />
magnet hysteresis clutch/brakes<br />
with a size 5 version that<br />
increases the slip torque range<br />
to 0.1–12Nm. The devices offer<br />
<strong>reliable</strong>, wear-free torque<br />
limitation in continuous slip applications. Unlike frictionbased<br />
devices, torque is transmitted without contact via<br />
magnetic forces, extending service lives <strong>and</strong> ensuring<br />
accurate, repeatable slip torque values.<br />
The compact, maintenance-free clutch/brakes can be<br />
used for load-holding, tensioning or torque-limiting<br />
applications. Their low weight <strong>and</strong> mass moment of inertia<br />
allow easy integration into a variety of applications.<br />
Optional sealed <strong>and</strong> corrosion-protected versions are<br />
available for use in almost any environment.<br />
Mayr Transmissions 01535 663900 www.mayr.co.uk<br />
Spur gears target everyday uses<br />
Ondrives has introduced a series of<br />
“competitively priced” spur gears for<br />
everyday uses. The gears are available<br />
with or without a boss, with various<br />
numbers of teeth <strong>and</strong> bore sizes,<br />
keyways, <strong>and</strong> tapped <strong>and</strong> pin holes.<br />
Sizes range from 0.5–6 Mod as<br />
st<strong>and</strong>ard with others available on<br />
request. St<strong>and</strong>ard materials are steel<br />
<strong>and</strong> white Delrin. Most parts are<br />
available off-the-shelf with short turnaround times for parts<br />
not in stock. Modifications to st<strong>and</strong>ard parts <strong>and</strong> specials to<br />
customer drawings are available with short lead times.<br />
Ondrives 01246 455500 www.ondrives.com<br />
Large-bore SRBs<br />
last twice as long<br />
NSK has exp<strong>and</strong>ed its HPS range<br />
of spherical roller bearings up to<br />
260mm bore. The bearings,<br />
known as the CAM series, are<br />
said to offer twice the lifespan<br />
<strong>and</strong> a 20% higher limiting speed<br />
than conventional spherical roller bearings (SRBs), resulting<br />
in cost <strong>and</strong> energy savings, <strong>and</strong> reduced maintenance.<br />
The improved wear resistance of the larger bearings<br />
under high speeds <strong>and</strong> mechanical loads enables them to<br />
cope with dem<strong>and</strong>ing applications. The bearings differ in<br />
design from the existing HPS-EA SRBs (up to 130mm bore)<br />
<strong>and</strong> have a guide ring for precise roller guiding, <strong>and</strong><br />
optimised solid brass retainers which carry higher loads <strong>and</strong><br />
offer high wear resistance. As well as increasing the lifespan<br />
<strong>and</strong> the wear resistance of the bearings, the design changes<br />
also increase their dynamic load rating by up to 25%. This<br />
can allow downsizing in high-loaded drive assemblies,<br />
cutting space <strong>and</strong> costs.<br />
NSK UK 0500 2327464 www.nskeurope.com<br />
COMMUNICATIONS<br />
Converters connect serial<br />
devices to Ethernet<br />
Brainboxes has introduced a range of Ethernet-to-serial<br />
converters that provide fast, <strong>reliable</strong> connections between<br />
Ethernet ports on a network <strong>and</strong> asynchronous serial<br />
interfaces. The one- or two-port RS-232 <strong>and</strong> RS-422/485<br />
device servers support data transfer rates up to 230.4 kbd.<br />
The autonomous converters allow devices at the edge of<br />
a network to be managed from any connected location<br />
with the same control as if working locally. They come with<br />
drivers for Windows 7 <strong>and</strong> XP 32-bit <strong>and</strong> 64-bit versions.<br />
Brainboxes is packaging them with its Boost.net driver,<br />
keeping existing software applications on the network <strong>and</strong><br />
allowing high reliability connections over long distances.<br />
The converters, which consume less than 1W, are housed in<br />
rugged metal enclosures.<br />
Brainboxes 0151 2202500 www.brainboxes.com<br />
IP67 box provides<br />
serial-EtherCat links<br />
Beckhoff has announced an IP67-<br />
protected module that can connect<br />
devices with serial interfaces, such as<br />
barcode or RFID readers, to EtherCat<br />
networks without needing a control<br />
cabinet. Using selectable RS-232 or<br />
RS-422/485 interfaces, the compact,<br />
two-channel EP6002 module<br />
integrates the serial devices into<br />
EtherCat networks.<br />
The module transmits the data in a<br />
transparent way to higher-level<br />
EtherCat controllers. The serial<br />
communication channels operate in full-duplex mode at up<br />
to 115.2 kbd. Serial devices are connected via rugged M12<br />
connectors. When used with suitable software, the module<br />
can also be used without a controller as a COM interface in<br />
Windows-based systems. It measures 126 x 30 x 26.5mm.<br />
Beckhoff Automation 01491 410539 www.beckhoff.co.uk<br />
Gateway delivers wireless<br />
ZigBee-serial connections<br />
IDC has launched a gateway that acts as a ZigBee-to-serial<br />
interface connection, <strong>and</strong> can convert RS-232/422/485<br />
serial devices, such as intelligent sensors <strong>and</strong> barcode<br />
readers, into wireless devices. The ZB103 gateway is<br />
designed for applications such as remote control <strong>and</strong><br />
monitoring of machinery where cables are difficult to install,<br />
or for transferring data to <strong>and</strong> from mobile plant.<br />
The device can operate as a gateway for a network of<br />
ZigBee devices in factory automation, warehouse<br />
management <strong>and</strong> production monitoring systems, linking to<br />
a PLC via a serial port using Modbus or other protocols. The<br />
gateway complies with IEEE 802.15.4, providing two-way<br />
communications on the licence-free 2.4GHz b<strong>and</strong>. It can<br />
connect hundreds of devices in a mesh network using<br />
gateways, routers <strong>and</strong> end devices (usually batterypowered).<br />
It is housed in a robust IP45 enclosure.<br />
IDC 01332 604030 www.zig-bee.co.uk<br />
58 November/December 2010 www.drives.co.uk