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A CAN bus I/O node has been integrated into Wachendorff’s WDGA CANopen absolute encoder range, giving users the opportunity to combine precision rotary position and/or speed feedback and a means of connecting digital and analogue sensors or other devices on automated motion-centric machinery. Available in the UK from Variohm EuroSensor, the WDGA-I/O encoders utilise a coded magnetic signal for 4096 counts per revolution as well as each full revolution – providing 16-bit multi-turn absolute position feedback without relying on wear-prone gears or limited life batteries. These integrate up to three multi-functional inputs and

outputs; each may be configured as digital and/or analogue I/O (1x four-wire, 2x two-wire). Users may connect, for example, CANopen compatible thermocouples, PT100 temperature sensors, DMS, 0…4-20 mA or ±10 VDC devices. In addition, the I/O ports can be configured and scaled quickly and easily for a specific type of sensor. These are suitable for harsh

industrial applications as well as mobile machinery, and have an operational temperature range of -40 to +80°C.

Variohm EuroSensor Enter 229


New from Sunpower is the MSP-600 series of 600W AC/DC medical enclosed type power supplies. Introduced in response to the demand for high-wattage, reliable medical power supplies, these comply with international medical safety regulations (MOOP level) and feature low leakage current, rated at 300μA or less at 264 VAC. These are also suited to ‘green’ medical equipment or electrical devices. Features include a universal AC input

of 85-264V, with output voltage options from 3.3V to 48V and operating efficiency as high as 89%. An internal DC fan can be activated for forced air cooling, allowing full-load operation in -40˚C to +50˚C ambient temperatures, extending to +70˚C with suitable derating. Other functions include short circuit, overload, over voltage and over temperature protection, 300 VAC input surge immunity for five seconds, etc. Sunpower Enter 230


The new KT51 series pushbutton from ifm electronic consists of capacitive sensors built into a standard M22 pushbutton housing, complete with LED indication for actuation feedback. According to the company, no

physical pressure is needed to activate the button, yet the KT51 won’t react to a film of moisture, and is sealed to IP69K on the front face. The range is available in two

versions with either static or dynamic operation. Static operation means the switch is made while the operator’s finger is present, while dynamic operation

short cable or a cable with M12 connector. When powered, the green LED lights change to red when switched. One version allows the system to turn the green LED on separately to indicate that the system expects that button to be pressed. In addition, the sensor is

provides a fleeting pulse as the finger approaches, detecting a change and so ignoring any possible deposits left from the previous activation. The KT51 series is a DC pnp device, supplied with either a

supplied without a symbol – different symbol inserts are offered which snap into the top of the device leaving a smooth, flush surface.

ifm electronic T: 020 8213 0000 Enter 231


A new generation of precision, electric linear actuators has been introduced by Thomson Industries for continuous duty applications. The compact yet high power density PC series of actuators are said to result in simpler machine designs, lower maintenance, higher overall performance and substantially lower energy costs. Actuators in sizes 25, 32 and 40 have

square sizes of only 34mm, 45mm and 55mm, respectively, yet deliver as high as 6,000N of thrust force. Stroke lengths of up to 1200mm are available. Featuring high efficiency ball screws,

these offer efficiencies of over 80% and use energy only on demand. Converting from pneumatic to electric actuation can, for many applications, generate in one year energy savings per axis which exceed the cost of the new actuator, claims the company. These also offer flexibility to machine

designers who frequently need to change set-ups to run different products or processes. Changing end stops or velocity profiles can be done on the fly with electric actuators. With an IP65 rating, the PC Series is suited to food processing and packaging, material handling and factory automation applications where high accuracy, reliability and 100% duty cycle operation is required.

Thomson Linear Enter 232

SIDE MOUNT FITTING ADDED TO ENCODERS In use, an LED in the sensor provides

To complement the existing top mount option, the Micro Tape Encoder (MTE) range of encoders, available from Inmoco, now has a side mount fitting. Part of the MicroE Systems product family, the MTE is said to be optimised for linear applications with space and cost constraints where rapid time to market and energy efficiency are critical. There are three models available. The

MTE-4 has a resolution of 5µm; the MTE-8 resolves to 2.5µ, and the MTE-20 to 1µm. All have an operating speed of 7.2m/s and produce a digital output, which can be A-quad-B, index window or alarm.


real-time indication of system health and alignment, while interpolation is performed within the sensor itself. MTE works with Compact Encoder Tape (CET),

which is only 6mm wide, installs quickly on virtually any surface with standard adhesive backing, and can easily be cut to length in the field. Furthermore, the sensor measures just 20.6 x 12.7 x 8.7mm and weighs only 5g.

Inmoco T: 01327 307600


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