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EMA Series Stand Alone Encoder

EMA Series Stand Alone Encoder
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FEATURES • Quadrature output (Channel A, Channel B, Index) • Several resolutions available • Low inertia: 5.19 x 10-8 kg-m2 • Interfaces directly with Magtrol controllers • Mountable to a Magtrol PT 25 Base Plate DESCRIPTION Magtrol’s EMA Series Stand Alone Encoder provides a square wave output on two channels for up/down counting or free-run motor speed measurement applications. Each channel outputs the specified pulses per revolution of the encoder shaft, and is 90° phase-shifted in order to determine direction when used with the appropriate counter/timer DAQ board. The device incorporates an infrared optical switch and disk assembled into a rugged aluminum housing. The encoder is supplied with an 8 mm rectangular key for easy alignment to a Magtrol PT 25 Base Plate. OPERATING PRINCIPLES DIMENSIONS EMA Series Data Sheet Quadrature Encoding A quadrature encoded signal consists of two square-waves, A and B, which are offset from each other by 90°. The direction of rotation can then be inferred from the order in which the two sensors detect each radial line. If A leads B by 90° (as shown in the figure to the right), the shaft is rotating clockwise. If A lags B by 90°, the shaft is rotating counterclockwise. The rate of either square-wave depends on the rotational speed of the shaft. NOTE: Width and depth are base dimensions. Detailed dimension drawings can be found on Magtrol’s web site. Solid 3D models are also available by contacting Magtrol. IDEAL WAVE FORMS CLOCKWISE ROTATION

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Q SpecificationsRATINGS Maximum Mechanical Speed (rpm) *14-pin cable (P/N 88M007) must be ordered separately. Confirm instrumentation can read developed frequencies. **Limited by maximum mechanical speed. Due to the continual development of our products, we reserve the right to modify specifications without forewarning. MAGTROL INC 70 Gardenville Parkway Buffalo, New York 14224 USA Phone: +1 716 668 5555 Fax: +1 716 668 8705 E-mail: magtrol@magtrol.com MAGTROL SA Route de Montena 77 1728 Rossens / Fribourg, Switzerland Phone: +41 (0)26 407 3000 Fax: +41 (0)26 407 3001 E-mail:...

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