W2DN-02A

Type W2DN-02A Wide area magnetic sensor  Features  High sensitivity magnetic sensor making use of the magnetic impedance effect.  The usability has been remarkably improved by reducing the variation in the detection performance.  Type code standard Type W2DN - 02 A (1) (2) (3) (1) Represents a wide area magnetic sensor (2) Represents a series name (3) Represents a sensitivity rank  Specifications Item Rating / performance Type (sensitivity rank) W2DN-02A max. 155 mm typ. 145 mm min. 135 mm Detection range: Rx, Ry (*1) Standard magnet Exterior dimensions of the magnet: 20 x 20 x 10 mm Surface magnetic flux density: 430 mT (millitesla) Direction of magnetization: direction of thickness Power voltage 5 DCV −10% to 12 DCV +10% Power consumption 20 mA or less Output states Open collector output Maximum output current 20 mA or less, output voltage 16 VDC or less Output residual voltage 0.5 V or less Output operation states When detected: When not detected: When faulty (*2): Response time 0.8 s or less Start-up time after powering on (*3) 1.5 s or less Ambient temperature (*4) When in operation: -10 to 60 deg C (must be free from freezing or condensation) When stored: -20 to 70 deg C (must be free from freezing or condensation) output transistor OFF output transistor ON output transistor held OFF Ambient humidity 25 to 85 %RH *1. The detection range is specified based on the mounting conditions as shown below. (The datum point of the standard magnet is the center of the magnet.) The specifications are given by Rx and Ry, with Rxy shown for information purpose only. Detection range Magnet Direction of attraction Figure 1 Detection range: R *2. *3. *4. Figure 2 Mounting conditions The product has a function to automatically adjust the detection range when the sensor is powering up. This item represents the case of failure to properly conduct the automatic adjustment due to the effects of magnetism in the vicinity of the sensor. It shows the period of time from the powering ON of the sensor to the correct output of the detected state. The ambient temperature (when in operation) indicates the temperature range in which the automatic adjustment of the detection range can be properly performed. 1 W2DN-02A  Output circuit diagram Magnetic sensor main circuit Power supply  Operation chart (1) In case the automatic adjustment of the detection range has been properly conducted when powering on the sensor 1.5 s or less Power voltage VCC 0V Magnetism Detected detection Not detected Indeterminate Output transistor ON OFF (2) In case the automatic adjustment of the detection range has failed when powering on the sensor 1.5 s or less Power voltage VCC 0V Magnetism Detected detection Not detected Indeterminate Output transistor ON OFF 2 W2DN-02A  Precautions for use To compensate for the effects of ambient magnetism and temperature, the detection range is automatically adjusted when the sensor is powering ON. When powering ON the sensor, pay attention to the following items. (1) For a period of 1.5 seconds after the sensor has been powered ON, the output transistor is forced to stay ON and does not output the detected state. If the sensor powering ON is extremely slow, the output state of the output transistor may become indeterminate. (2) Wherever possible, avoid the effect of magnetism when starting up the sensor. Otherwise, the detection range may fluctuate. When using the sensor, sufficiently check the characteristics. Examples: Avoid driving solenoids and motors. Keep magnets away when starting up the sensor. (3) If the automatic adjustment has failed when powering ON the sensor due to the effects of magnetism in the vicinity of the sensor, the output transistor is held OFF. To release the state, retry the sensor powering ON with consideration of the effects of magnetism in the vicinity of the sensor so that the automatic adjustment can be properly conducted. In case any magnetic metal is placed in the vicinity of the sensor, the detection range may become reduced or the automatic adjustment of the detection range may fail, resulting in the output transistor holding the state of being OFF. When using the sensor, sufficiently check the characteristics. The sensor may detect the magnetic noises of solenoids, motors, etc. In that case, incorporate some design considerations, such as keeping the source of the magnetic noise away, or invalidating the sensor output when driving solenoids or motor. If the metallic objects around the sensor have been magnetized due to a powerful magnet and, at the same time, the sensor has detected magnetism, the output transistor may keep the state of being OFF. To release the state, the sensor needs to be restarted. Some design considerations should be incorporated to reflect it. 3 W2DN-02A  Exterior dimensions * Unless otherwise specified, the dimensional tolerance shall be IT16 [unit: mm]. Detection center indication Brand name Type code Lot number Connector JST-made GH series 3P Terminal symbol. (Indication) VCC (V) OUT (O) GND (G) Notes Terminal symbol. 4 1. The table shows the relationships between the connector terminal symbols and terminal numbers. 2. The housing compatible with the connector shall be type GHR-03V- made by JST Co., Ltd. Terminal No. 1 2 3 :'1$ 5 All sales are subject to Omron Electronic Components LLC standard terms and conditions of sale, which can be found at http://www.components.omron.com/components/web/webfiles.nsf/sales_terms.html ALL DIMENSIONS SHOWN ARE IN MILLIMETERS. To convert millimeters into inches, multiply by 0.03937. To convert grams into ounces, multiply by 0.03527. OMRON ON-LINE OMRON ELECTRONIC COMPONENTS LLC Global - http://www.omron.com USA - http://www.components.omron.com 847-882-2288 Cat. No. W2DN-02A(E)R03a 11/14 6 Specifications subject to change without notice Printed in USA