The robust M200D AS-i Basic motor starter can be installed outside the control cabinet and close to the motor thanks to its compact design and high degree of protection (IP65). This is particularly advantageous for material handling and conveying where extensive distributed drive applications are the norm.
The M200D AS-i Basic is available as a direct or reversing starter for motors and can start them electronically and mechanically. The wide setting range up to 5.5 kilowatts permits flexible use of the starter. The motor starter's electronic overload relay and circuit breaker protect the motor against overload and short-circuit.Moreover, the motor starter offers optional full motor protection through the evaluation of signals from temperature sensors mounted on the motor. With the repair switch, the user can open the circuit breaker and thus interrupt the current in order to repair the motor. Diagnostic data such as the equipment status, asymmetry or overload are passed on to higher-level systems via the AS-i.
As an option, an integrated operator terminal with jog switch and maintained-contact switches for deactivating the Quick Stop function or for changing the operating mode (direct starter versus reversing starter) are available. The Quick Stop function enables rapid shutdown of the motor irrespective of bus runtimes, thus ensuring locally precise, reproducible stopping of the material being conveyed. Integrated brake controllers with voltages of 230 V/400 V AC or 180 V DC are also available.
Julia Kauppert | Siemens Industry Automation
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Plants and algae use the enzyme Rubisco to fix carbon dioxide, removing it from the atmosphere and converting it into biomass. Algae have figured out a way to increase the efficiency of carbon fixation. They gather most of their Rubisco into a ball-shaped microcompartment called the pyrenoid, which they flood with a high local concentration of carbon dioxide. A team of scientists at Princeton University, the Carnegie Institution for Science, Stanford University and the Max Plank Institute of Biochemistry have unravelled the mysteries of how the pyrenoid is assembled. These insights can help to engineer crops that remove more carbon dioxide from the atmosphere while producing more food.
A warming planet
Our brains house extremely complex neuronal circuits, whose detailed structures are still largely unknown. This is especially true for the so-called cerebral cortex of mammals, where among other things vision, thoughts or spatial orientation are being computed. Here the rules by which nerve cells are connected to each other are only partly understood. A team of scientists around Moritz Helmstaedter at the Frankfiurt Max Planck Institute for Brain Research and Helene Schmidt (Humboldt University in Berlin) have now discovered a surprisingly precise nerve cell connectivity pattern in the part of the cerebral cortex that is responsible for orienting the individual animal or human in space.
The researchers report online in Nature (Schmidt et al., 2017. Axonal synapse sorting in medial entorhinal cortex, DOI: 10.1038/nature24005) that synapses in...
Whispering gallery mode (WGM) resonators are used to make tiny micro-lasers, sensors, switches, routers and other devices. These tiny structures rely on a...
Using ultrafast flashes of laser and x-ray radiation, scientists at the Max Planck Institute of Quantum Optics (Garching, Germany) took snapshots of the briefest electron motion inside a solid material to date. The electron motion lasted only 750 billionths of the billionth of a second before it fainted, setting a new record of human capability to capture ultrafast processes inside solids!
When x-rays shine onto solid materials or large molecules, an electron is pushed away from its original place near the nucleus of the atom, leaving a hole...
For the first time, physicists have successfully imaged spiral magnetic ordering in a multiferroic material. These materials are considered highly promising candidates for future data storage media. The researchers were able to prove their findings using unique quantum sensors that were developed at Basel University and that can analyze electromagnetic fields on the nanometer scale. The results – obtained by scientists from the University of Basel’s Department of Physics, the Swiss Nanoscience Institute, the University of Montpellier and several laboratories from University Paris-Saclay – were recently published in the journal Nature.
Multiferroics are materials that simultaneously react to electric and magnetic fields. These two properties are rarely found together, and their combined...
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