| Customization: | Available |
|---|---|
| Type: | Magnetic Displacement Sensor |
| Output Signal Type: | Digital Type |
|
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The eddy current rotational speed sensor is a commonly used non-contact sensor for measuring the rotational speed of rotating machinery. It utilizes the eddy current effect to detect the position and movement of an object (usually a metal). A high-frequency electromagnetic field is generated on the surface of the metal being measured, which affects the induction coil inside the sensor, causing changes in the coil's inductance and thereby determining its rotational speed.
| General | ||
| Function | The speed sensors ECVS-2xx.xx SHx are suitable, in conjunction with | |
| an Aluminium pole wheel (or other conducting, non-magnetic metal) for | ||
| generating two nominally 90° phase shifted square wave signals | ||
| indicating the rotary speeds and the direction of rotation. | ||
| Technical data | ||
| Supply voltage | Nominal 15VDC (8 VDC to 30 VDC), protected against reverse polarity | |
| and transient over voltages | ||
| Signal output | • 2 phase shifted square wave signals, output 1 (S1) and output 2 (S2) | |
| and direction output. | ||
| • Duty cycle 50% ± 25% | ||
| • Phase shift 90° ±40° (on request ± 25°; target specification needed) | ||
| • Push-pull outputs : Imax = ± 30 mA | ||
| o Output voltage HI (for I = Imax): UHI > Usupply - 1.5 V | ||
| o Output voltage LO (for I = Imax): ULO < 1.5 V | ||
| • The outputs are short circuit proof and protected against reverse | ||
| polarity. | ||
| Current consumption | Max. 30 mA (without load) | |
| Frequency range | Up to 20 kHz | |
| Electromagnetic | ||
| compatibility (EMC) | compliant with | EN 50155 |
| Protection class | Sensor head: IP68 | |
| Shock & Vibration | compliant with | EN 61373 Cat.3 |
| Operating temperature | • Sensor head: -40° ... +120°C | |
| • Cable: -40°C to +150 °C for the standard cable type 824L-36622 | ||
| Requirements for pole wheel | Aluminum toothed wheel (other non-magnetic material on request) | |
| Optimal performance with | ||
| • Rectangular gear tooth Module 3 | ||
| • Tooth width ≥ 15 mm | ||
| • Valley deep ≥ 3 mm | ||
| • Side offset < 1 mm | ||
| • Eccentricity < 0.1 mm | ||
| Air gap between sensor housing and | Module 2 | 0.2 … 1 mm |
| pole wheel (depends on the pole wheel | Module >=3 | 0.2 … 1.5 mm |
| shape) | ||
| Insulation | • Housing and electronics galvanically separated (500 V/50 Hz/ 1 min) | |
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