E4A-3K
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Ultrasonic Reflective Sensor Sensor with an Adjustable Sensing Distance of 0.3 to 3 m Under Stable Operation without Background Interference ■ Ensures a stable operating range with minimal side-lobe areas. ■ Built-in unstable operation check function allows easy adjustment to a proper mounting direction. ■ Mono-block construction with a sensor, power supply, and terminals ensures easy wiring. ■ Incorporates synchronous selector and reference pulse I/O terminals ideal for parallel-operation use without mutual interference. Ordering Information Sensing method Model Application Examples Detection of cellophane, glass, and photosensitive paper Detection of objects on conveyors or discrimination of object heights

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Supply voltage Power consumption Sensing distance Adjustable between 0.3 and 3 m (selectable ranges of 0.3 and 2 m or 1.3 and 3 m) Standard sensing object 100-mm dia., 1.5-m-long metal or plastic round pipe Minimum sensing object Ultrasonic oscillation frequency Directional angle Response time Operate time: 0.25 s; release time: 0.5 s Control output Contact output: SPDT 3 A at 220 VAC, cos dia.=1 or 3 A at 24 VDC, cos dia.=1 Ambient temperature Operating: –20°C to 55°C (with no icing) Ambient humidity Insulation resistance Dielectric strength Vibration resistance Destruction: 10 to 25 Hz,...

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Operating Zone (Typical Examples) The operating zone is the sensing range of the E4A-3K at the sensing distance with the sensing object moved vertically towards the ultrasonic beam. The operating zone varies with the sensing distance and sensing object. Distance (cm) Ultrasonic Sensor Sensing object: 200 x 200 (mm) flat plate Ultrasonic Sensor Reference • Each of the following illustrations indicates the operating zone with the E4A-3K mounted to the ceiling for the purpose of detecting the human body. In either case, make sure that the lower limit of the sensing range is approximately 0.5 m...

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Dimensions Note: All units are in millimeters unless otherwise indicated. External Connections Example of Connections of the E4A-3K in Asynchronous Operation Contact output Note: 1. If the synchronous operation of the E4A-3K is not required, set the reference pulse selector to ON. Keep terminals 7 and 8 open. 2. Use a cable with an external diameter of 10 mm max. for wiring. Example of Connections of the E4A-3K in Synchronous Operation Contact output Contact output Note: 1. If the synchronous operation of the E4A-3K is required, set the reference pulse selector of only one Unit to ON. Then...

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Adjustments Reference Pulse Selector Position If more than one Unit is used at one location, the Units will need to be in synchronous operation to prevent mutual interference. In that case, set the reference pulse selector of only one Unit to ON. Set the reference pulse selector of each Unit to ON if the Units are in asynchronous operation. Refer to External Connections for details. Operation indicator Sensing distance adjuster Sensing side Sensing distance d Operating range l 0.1 d min. Distance selector Reference pulse selector Sensing Distance Adjustments Before adjusting the sensing...

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Sensor Mounting Angle If the E4A-3K is in level control or distance control of sensing objects, the stability of signal detection will depend on the sensing surface condition of the objects. Considering the repose angle of the objects, mount the E4A-3K so that the ultrasonic beam and the sensing surface of each object meet at right angles to each other. Surrounding Objects Make sure that the Sensor is free from surrounding objects that reflect the ultrasonic beam diffusion, otherwise the Sensor may malfunction. In particular, pay the utmost attention so that no side lobe of the ultrasonic...

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ALL DIMENSIONS SHOWN ARE IN MILLIMETERS. To convert millimeters into inches, multiply by 0.03937. To convert grams into ounces, multiply by 0.03527. CSM_E4A-3K_DS_E_3_1 D064-E1 In the interest of product improvement, specifications are subject to change without notice. OMRON Corporation Industrial Automation Company Sensing Devices Division H.Q. Application Sensors Division Shiokoji Horikawa, Shimogyo-ku, Kyoto, 600-8530 Japan Tel: (81)75-344-7068/Fax: (81)75-344-7107

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Read and Understand This Catalog Please read and understand this catalog before purchasing the products. Please consult your OMRON representative if you have any questions or comments. Warranty and Limitations of Liability WARRANTY OMRON's exclusive warranty is that the products are free from defects in materials and workmanship for a period of one year (or other period if specified) from date of sale by OMRON. OMRON MAKES NO WARRANTY OR REPRESENTATION, EXPRESS OR IMPLIED, REGARDING NON-INFRINGEMENT, MERCHANTABILITY, OR FITNESS FOR PARTICULAR PURPOSE OF THE PRODUCTS. ANY BUYER OR USER...

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