ELECTRIC ACTUATORS - YOO SHIN E&I CO., LTD.

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2 USER’S GUIDE SUMMARY CHOOSING THE RANGE CHOOSING THE <strong>CO</strong>NTROL FIELDBUS p4 Analysis p6 Environment p8 Operation type p9 Fail safe p10 Choosing the range p12 Mechanical and electrical features p16 The possibilities p17 Comparison p18 Integral control p20 Signalling options p21 Communication by fieldbus
The electric actuator, initially designed to operate valves and dampers has now become a maintenance and control tool. The integration of the control elements directly inside the actuator provides for a command perfectly adapted to the various functions of the device. The data of its internal sensors are conveyed by a fieldbus, informing the users of the valve operating conditions and enabling remote modification of some parameters. The user can thus modify the operating parameters locally and without opening the covers, providing for a real “plug and play”. Ranges suited to the need Depending on the element to be driven, the electric actuator shall be designed so as to meet the requirements of its operating environment. Data such as the degree of water tightness, the desired explosion-proof protection and also the presence of certain corrosive agents must be perfectly known by the user and taken into account. Requirements can be of several types : for instance, electrical actuators intended for nuclear plants shall feature high resistance to earthquakes or extreme temperatures. Operating conditions are a key factor and the design itself depends on requirements such as the type of operation : on/off or modulating, the number of operations (3000 or 1 million) or the precision of positioning (low or high). With the L. BERNARD classification, users can easily define their needs. Moreover, a fail-safe system is available for the users, even with an electric actuator. Choice of control depends on process During installation, users can choose to integrate 3 USER’S GUIDE THE <strong>ELECTRIC</strong> ACTUATOR the control boxes to the electric actuator or to remotely install them into control cabinets. A series of controls are proposed to the users on all ranges. The integral version, adapted or not to modulation provide for local or remote controls. The smart versions combine the advantages of the classic integral versions with the flexibility offered by the microprocessor : maintenance, automatic adjustment, etc. Communication by fieldbus is possible whatever the range or control selected. As the fieldbus is now available on a growing number of facilities, large volumes of data can be transferred while considerably reducing the on-site wiring costs. Several Bus interfaces are available whatever the electric actuator and its control. Thus, the choice of an electric actuator is critical as regards the reliability of the industrial process but also the optimum operation at commissioning as well as throughout the device lifetime. The L. BERNARD products have been designed to be tailored to the required needs with the best quality/cost combination. They are manufactured according to recognized quality standards : As the L. BERNARD products are constantly enhanced, please check the specifications when placing your orders.
Page 1: ELECTRIC ACTUATORS A104/02
Page 5 and 6: 5 USER’S GUIDE 3. TYPE OF OPERATI
Page 7 and 8: The European directive 94/9/CE, app
Page 9 and 10: The fail-safe devices are used to p
Page 11 and 12: ENVIRONMENT WITH FAIL SAFE POSITION
Page 13 and 14: Electric motors The choice of an op
Page 15 and 16: The use of a patented cam holder sy
Page 17 and 18: REMOTE CONTROL LOCAL CONTROL INTERN
Page 19 and 20: ● Proportional control : POSIGAM+
Page 21 and 22: The fieldbus is the mean commonly u
Page 23 and 24: This configuration offers the advan

ELECTRIC ACTUATORS - YOO SHIN E&I CO., LTD.

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