New Output Current Transducer
Here's the ATQ Series frequency output current transducer.
With a patented open collector transistor frequency output design, the series is used as an input to high speed counter or frequency programmable logic controller modules (PLCs), panel meters, or programmable relays to accurately monitor machine current usage to within ±1% of range. Multiple ranges from 0-2 to 0-200 amp are available to provide resolution that fits the needs of the particular applications. A split-core enclosure helps simplify installation by eliminating the need to disconnect the monitored conductor to install the sensor. The ATQ series is suited for use where no analog inputs are available.
Units are for use in motion and motor control applications such as pump, grinder, and fan motor monitoring status, belt jam sensing in conveyor applications, and motor control in deburring/brush operations. They are also usable as an electronic shear pin to detect strain. Additionally, ATQ current transducers are suited for measuring current use in machine tools, polishing and cutting operations where a small PLC has sufficient capacity to accept the sensor inputs measuring speed, time-of-use, and electrical demands of the equipment.
Source: NK Technologies, 3511 Charter Park Drive, San Jose, CA 95136.
New Book on Instrumentation, Control System Documentation
The International Society of Automation's newly published "Instrumentation and Control Systems Documentation, Second Edition," incorporates improvements suggested by readers and those that reflect subsequent changes in industry practice.
It uses industry standards, especially ANSI/ISA-5.1-2009—Instrumentation Symbols and Identification, to define and describe the symbol-based language that identifies measurement and control devices.
The control systems documentation addressed within the book includes process flow diagrams, piping and instrumentation diagrams, instrument indexes and data bases, specification forms, logic diagrams, loop diagrams, installation details and location plans. The purpose and content of these documents, as well as options with regard to the information presented, are discussed in detail. Information is presented in the time line of a typical design and engineering project.
Source: International Society of Automation, 67 Alexander Drive, Research Triangle Park, NC 27709.
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