Products Editor’s Choice Dedicated HVAC drive launched
to 75kW for 380-480V 3-phase systems and 0.75kW to 30kW for 200-240V 3- phase systems. The drive is IP21 or IP55 rated, helping to provide protection against dust and moisture ingress, and features a motor noise reduction function making it suitable for use with pumps and fans locat- ed in occupied rooms or public areas. Offering open communications, the
Schneider Electric has introduced its new ATV212 variable speed drive (VSD) which has been engineered for building HVAC applications. The new drive helps organi- sations to address the energy consumption of dedicated pumps and fans, improving the performance of the system. The new device features energy adapta-
tion technology which optimises energy usage within the process by monitoring the flux in the motor and adjusting its output to meet precise needs. In addition, its C-less power technology reduces harmonics. The ATV212 is available from 0.75kW up
ATV212 is embedded with Modbus, BacNET, Apogee and Metasys and also features a fire mode function for motors used for smoke extraction applications. In addition, a damper control function ensures the motor does not start when dampers are not in the correct position. The device comes with a universal
graphic keypad option and is fully com- patible with other solutions in Schneider Electric’s VSD offering. Bluetooth mobile phone connectivity is available through Schneider Electric’s SoMove software suite, enabling remote config- uration and control. Schneider Electric
www.schneider-electric.co.uk T: 0870 6088 608
Enter 223 On the right track for solar capture For motion specialists
HepcoMotion, suntracking is a growing application. Its ring sys- tems can withstand high temper- ature, dust ingress and zero lubrication so they are well suited to be the actuators onto which solar panels or mirrors are mounted to follow the sun. Many installations use fixed
cells, where the cells are perma- nently orientated towards the point at which the sun is at its highest position in the sky, pro- viding the greatest concentration of energy. Clearly the downside is that these systems are less effi- cient at capturing energy during other times of the day. Suntracking is a method that is
increasingly being adopted to enhance the efficiency of the solar cell by continuously opti- mising its position in relation to the sun. The HepcoMotion ring is used to achieve a pan and tilt arrangement to keep the cell ori- entated to the sun as it tracks the sky. The resultant energy is then turned directly into electricity in the cell or used to turn water into steam that powers turbines for electricity generation. Another variation on the same
theme is the use of mirrors that direct the solar energy onto a central photovoltaic cell. HepcoMotion
www.hepcomotion.com T: 01884 243 400
Enter 224 Simplifying safety choices
Rockwell Automation has expanded its portfolio of machine safety devices with the introduction of its Guardmaster Safety Relay (GSR). Rockwell claim that users of this new multi-function device can experience space savings of up to 50% and can reduce wiring by between 30-50%. The new offering has a universal input which supports the majority of safety components, and its two separate safety inputs offers twice the functionality of a standard relay. A key feature of the GSR is its single wire
safety connection. This new functionality allows the user to increase the number of outputs with a TUV approved single wire connection whilst maintaining the safety integrity at SIL3 - thereby simplifying wiring. A single rotary switch in combina- tion with the single wire connection allows AND/OR functional control, giving users the ability to address applications such as zonal control, maintenance functions or global/local emergency stop circuits.
The GSRs include a range of just six products, meaning that for cus-
tomers who wish to simplify their inventory and usage, they can select this smaller family of next generation, newer technology safety relays. With the range’s ability to be function configured for simple logic
tasks and having universal inputs, this smaller family of relays can support a range of safety devices for a variety of applications. The uni- versal input feature allows devices such as safety interlock switches, emergency stop switches, pressure sensitive mats and OSSD devices such as safety light curtains to use the same set of terminals. This removes the requirement for a specific safety relay for specific types of input devices and allows simplified system design, inventory manage- ment and maintenance in the lifecycle of a system. Rockwell Automation
www.rockwellautomation.co.uk T: 0870 242 5004
Enter 225 Encoder interface for SIL3 safety
SICK (UK) has introduced its new Hiperface DSL digital encoder feedback interface with both SIL2 and SIL3 safety capability for the communication of feed- back data from brushless servo motors to associated drive electronics. The solution is suitable for use in a
range of robotic and automated machin- ery applications as well as process and packaging equipment. A robust interface means that cores
inside the motor power cable can be used for the communication of feed- back data to the drive. The twisted pair traditionally used for the temperature winding sensor in a standard motor power cable can be utilised for the Hiperface DSL communication. Encoders supporting Hiperface DSL
will have an optional temperature sensor input for digitisation of the temperature signal and transmission to the drive, together with encoder feedback data. The result is the dedicated feedback cable can be completely eliminated. The encoders also contain lifetime management functionality for preventa- tive maintenance. Temperature, speed and rotation information will be logged
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inside the encoder with all information accessible via Hiperface DSL. Open accessibility to this information will enable plant operators and maintenance engineers to plan preventative mainte- nance enabling increased plant availabil- ity and reduced machine down-time. With future applications in mind,
Hiperface DSL will also allow the incorporation of additional sensor information to further enhance dynamic axis control, including torque, vibration and acceleration. SICK
www.sick.co.uk T: 01727 831 121
Enter 226 MAY 2011 Electrical Engineering
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