Tuesday, October 24, 2006
Failsafe industrial drive links to Profisafe
A new frequency converter from Siemens Automation and Drives is the latest addition to the Simatic ET 200S family of failsafe control systems, offering safe standstill monitoring and speed control.
The new ET 200S FC converter delivers stepless speed control of asynchronous motors, handles drive tasks ranging from simple frequency control through to stringent vector control and includes functionalities such as Safety Integrated (including Profisafe compatibility) and hot swapping. With its line-commutated regenerative feedback, the converter can be operated extremely efficiently.
The ET 200S FC is fully integrated into the Simatic ET 200S system and offers all the system advantages: lower wiring costs, self-assembling communications and energy bus, and rapid replacement of modules during operation (hot swapping).
This compact device has a modular construction and comprises a closed-loop control section and a power section that can be selected with rated outputs ranging from 0.75 to 4kW.
The new converter has a series of integrated protection mechanisms that increase the safety of equipment where there is a risk of personal injury.
Safety functions such as 'safe stop' prevent unintentional starting of the drive and 'safe braking ramp' (SBR) monitors standstill (to EN 60204 Category 0).
In addition, the 'safe reduced speed' (SG) function prevents a speed limit from being exceeded and can be implemented very cost-effectively without the need for motor encoders.
The ET 200S FC can be used for applications requiring safety related control systems conforming to EN 954-1 Category 3 and IEC 61508 SIL 2.
The power sections of the converter do not need chopper modules or brake resistors; when in generating mode, power is fed back into the supply system line-commutated.
Furthermore, the converter is operated without line-commutating reactors; this creates space in the control cabinet and reduces the power losses of the overall system.
As well as being suitable for simple drive and positioning tasks, the converter also supports torque control for conveyor system applications in the automobile, food, drink and tobacco industries, winding and unwinding drives as well as lifting gear.
Using a motor encoder, applications range as far as closed-loop control for high-precision speed and torque control.
The new ET 200S FC converter delivers stepless speed control of asynchronous motors, handles drive tasks ranging from simple frequency control through to stringent vector control and includes functionalities such as Safety Integrated (including Profisafe compatibility) and hot swapping. With its line-commutated regenerative feedback, the converter can be operated extremely efficiently.
The ET 200S FC is fully integrated into the Simatic ET 200S system and offers all the system advantages: lower wiring costs, self-assembling communications and energy bus, and rapid replacement of modules during operation (hot swapping).
This compact device has a modular construction and comprises a closed-loop control section and a power section that can be selected with rated outputs ranging from 0.75 to 4kW.
The new converter has a series of integrated protection mechanisms that increase the safety of equipment where there is a risk of personal injury.
Safety functions such as 'safe stop' prevent unintentional starting of the drive and 'safe braking ramp' (SBR) monitors standstill (to EN 60204 Category 0).
In addition, the 'safe reduced speed' (SG) function prevents a speed limit from being exceeded and can be implemented very cost-effectively without the need for motor encoders.
The ET 200S FC can be used for applications requiring safety related control systems conforming to EN 954-1 Category 3 and IEC 61508 SIL 2.
The power sections of the converter do not need chopper modules or brake resistors; when in generating mode, power is fed back into the supply system line-commutated.
Furthermore, the converter is operated without line-commutating reactors; this creates space in the control cabinet and reduces the power losses of the overall system.
As well as being suitable for simple drive and positioning tasks, the converter also supports torque control for conveyor system applications in the automobile, food, drink and tobacco industries, winding and unwinding drives as well as lifting gear.
Using a motor encoder, applications range as far as closed-loop control for high-precision speed and torque control.
# posted by Medical Information : 2:32 AM
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