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The Westlock K-10 electro-pneumatic positioner accepts variable instrumentation signals (between four and 20 milliamps) from a PLC, DCS or set point controller, and regulates the 80-psi air supply to and from the actuator. This process regulates the actuator position within its quadrant for precise modulation.
Digital Postioners
Asahi/America, Inc. is now offering the DHC-100 digital positioner for the Series 92 and Series 94 Electric Actuators. The DHC-100 is a high performance digital positioner, providing 450 points of resolution for quarter turn actuators ranging from two seconds to 120 seconds, and is rated for a 25 percent duty cycle or more. The DHC-100 has many automatic advanced features that will enhance our actuators while maintaining ease of installation and calibration.
The simple three-button control is used to configure all parameters the unit needs for a wide variety of applications, and allows the open and closed positions to be easily set for direct or reverse acting, without any rewiring. The unit can be configured for various command types (4-20mA, 1-5V, 0-5V, 0-10V, or a digital command), and a default operation upon loss of command.
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