Ultrasonic Long Range E4A-3K Long Sensing Distance of 0.3 to 3 m Background suppression for accurate sensing Fast alignment troubleshooting with stable operation check function Mutual interference protection built in Self-contained, no external power supply required Ordering Information Supply voltage Sensing type Sensing distance Part number 12 to 24 VDC Reflective 0.3 to 3 m E4A-3K DC12/24 120/240 VAC E4A-3K AC120/240 100/200 VAC E4A-3K Specifications RATINGS/CHARACTERISTICS Part number E4A-3K DC12/24 Sensing method Reflective Supply voltage 12-24 VDC, 10% ripple 120/240 VAC, 50/60 Hz, (p-p) 10% 10% 100/200 VAC, 50/60 Hz, 10% Power consumption 150 mA max. Approx. 2.5 VA Sensing distance Adjustable between 0.3 and 3 m (selectable ranges of 0.3 to 2 m and 1.3 to 3 m) Standard sensing object 100 mm dia., 1.5 m long metal or plastic round pipe Minimum sensing object 50 x 50 mm flat plate Directional angle 25 Ultrasonic oscillation frequency Approx. 40 kHz Response time Operate 0.25 s Release 0.5 s E4A-3K AC120/240 Approx. 2.5 VA Control output Contact output : SPDT 3 A at 220 VAC/24 VDC (resistive load) Indicators Operation, red LED Ambient operating temperature -20C to 55C (-4F to 131F) with no icing Relative humidity 45% to 85% (This table continues on the next page.) E4A-3K AC100/200 E4A-3K E4A-3K Specifications Table - continued from previous page Part number E4A-3K DC12/24 Insulation resistance 20 M minimum at 500 VDC Dielectric strength 1500 VAC, 50/60 Hz for 1 minute Vibration resistance 10 to 25 Hz, 1.5-mm double amplitude for 2 hours each in X, Y and Z axes Shock resistance 500 m/s2 (approx. 50 g) 6 times each in X, Y and Z axes Life expectance ( t t relay) l ) (output Mechanical 20,000,000 operations minimum Electrical 100,000 operations minimum Enclosure rating Approvals E4A-3K AC120/240 E4A-3K AC100/200 IP60 UL, cUL Recognized, File No. E41515 Weight Approx. 600 g with mounting bracket Approx. 500 g without mounting bracket OPERATING RANGE AND SENSING ZONE 1. Distance Selector Set to a Range Between 0.3 and 2 m 2. Distance Selector Set to a Range Between 1.3 and 3 m Sensor Sensor If the sensing distance (A) is set to 2 m, the sensing zone (B) is 1.5 to 2 m. If the sensing distance (A) is set to 0.3 m, the sensing zone (B) is 0 to 0.3 m. Reference level If the sensing distance (A) is set to 3 m, the sensing zone (B) is 1.5 to 3 m. If the sensing distance (A) is set to 1.3 m, the sensing zone (B) is 0 to 1.3 m. Reference level A: Sensing distance A: Sensing distance The sensing distance (A) is adjustable with the distance selector to a range between 1.3 and 3 m. The sensing distance (A) is adjustable with the distance selector to a range between 0.3 and 2 m. Blind zone B: Sensing zone Sensing zone (B) 0.5m Sensing zone (B) 1.5 m The distance from the reference level to the operating range (sensing zone). The distance from the reference level to the operating range (sensing zone). An object may be detected due to multiple reflection if the object is in the blind zone, in which case the detection of the object will not be stable. Therefore, do not attempt to use the E4A-3K to detect an object in the dead range by making use of multiple reflection. Note: Multiple reflection is a phenomenon caused by an ultrasonic beam reflected several times repeatedly between the sensing object and the Sensor or nearby objects such as the ceiling. 2 E4A-3K E4A-3K Engineering Data 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) Distance (cm) Sensing object : 100 dia. x 1,000 (mm) Operating zone (cm) * Ultrasonic sensor Operating zone (cm) Distance (cm) Sensing object : 25 dia. x 100 (mm) Sensing object: 200 x 200 (mm) flat plate Operating zone (cm) If more than one Unit is used within a maximum distance of 8m, be sure to wire the sensor for synchronous operation. Refer to External Connections for details. Ultrasonic sensor * Operating zone (cm) Operating zone (cm) Ultrasonic sensor Operating zone (cm) If there is a door between two Units located for different operating zones as shown in the following illustration, be sure to wire the Units for synchronous operation, or interference may occur when the door opens. Sensor 8 m max. Door 3 E4A-3K E4A-3K Dimensions Unit: mm (inch) E4A-3K 17 56 6.6 8 6.6 dia. Mounting Holes 40 Two, 6.5 dia. 22 32.5 40 (1.57) 24 dia. 159 (6.26) 4 150 118 50 (1.97) 105 3 Rubber cap Indicator 92 104 (4.09) 29 23 130 (5.12) 4 40 E4A-3K E4A-3K Installation EXTERNAL CONNECTIONS Example of Connections of the E4A-3K in Asynchronous Operation Example of Connections of the E4A-3K in Synchronous Operation ON ON OFF OFF ON OFF 100/120 VAC 100/120 VAC 100/120 VAC 200/240 VAC 200/240 VAC 200/240 VAC Tc Ta Tb Tc Ta Tb - + 12~24 VDC - + 12~24 VDC 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. Contact output Tc Ta Tb - + 12~24 VDC 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 connect terminal 7 of all the Units together and do the same for terminal 8. 2. A maximum of 50 sensors can be connected in synchronous operation. 3. Do not wire the lines for synchronous operation use (i.e., wires connecting to terminals 7 and 8) alongside power lines in the same conduit. 4. Use a shielded cable with an external diameter of 10 mm max. for wiring. 5. Make sure that all the Units in synchronous operation are turned on, otherwise none of the Units will operate. 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 DISTANCE ADJUSTMENTS Before adjusting the sensing distance, remove the rubber cap from the top of the E4A-3K. Be sure to put on the rubber cap after the sensing distance is adjusted. 1. Apply a flat-blade screwdriver to the groove of the distance selector to set the distance selector to either a range between 0.3 and 2 m or a range between 1.3 and 3 m according to the desired sensing distance and operating range. 2. To set the sensing distance, first locate a flat plate as a sensing object that is approximately 20-by-20 cm at the desired sensing distance. Then gradually turn the sensing distance adjuster clockwise (i.e., in the direction increasing the sensing distance) until the relay operates. The operation indicator will be lit when the relay operates. Distance selector Reference pulse selector 5 E4A-3K E4A-3K STANDARD SENSING DISTANCE SETTINGS * * If the sensing object is moving parallel to the ultrasonic beam for level or height detection, the sensing distance will be the distance required for the sensing object to move. If the sensing object is moving across the ultrasonic beam (i.e., the E4A-3K is in normal sensing operation), set the sensing distance so that the sensing side of the object passes through the center of the operating range as shown in the following illustration. Sensing distance d Sensing side Operating range Sensing distance d OPERATION CHECK Operating range If there is an object, such as a floor, wall, or conveyor, located behind the sensing object, make sure that the distance between the set sensing distance (d) and the background object is 0.1d min. Also, make sure that the set sensing distance (d) is at least 0.1d closer to the Sensor from the maximum limit of the operating range as shown in the following illustration. After adjusting the sensing distance, check that the E4A-3K operates properly by locating the sensing object within the operating range. Then remove the sensing object and check that the operation indicator is not lit. The operation indicator may be still be lit or flashing after the sensing object is removed. In that case, the E4A-3K may be malfunctioning due to beam reflection from objects outside the operating range or affected by ambient wind or temperature, in which case, eliminate the cause or change the mounting position or direction of the Sensor. If the mounting position or direction of the Sensor is changed, be sure to check the sensing distance and the operation of the E4A-3K. Operation indicator flashing Sensing side Sensing distance d Operating range 0.1 d min. 0.1 d min. From the above, the minimum height (h) of the sensing object is expressed by 0.2d. If the sensing object is comparatively low in height or if the E4A-3K is used for the delicate height discrimination of objects, it will be necessary to set the sensing distance to a small value. 6 Operation indicator not lit E4A-3K E4A-3K Precautions SENSOR MOUNTING ANGLE ENVIRONMENTAL CONDITIONS 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. Do not use the E4A-3K at a temperature exceeding the rated range or outdoors, otherwise the reliability and life of the E4A-3K will decrease. 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 peripheral area of the ultrasonic beam will be reflected by such objects. The Ultrasonic Sensor utilizes the air as a beam transmission media. Do not use the E4A-3K in places with strong air currents or extreme temperature changes. For example, if there is an air curtain that causes turbulence within the sensing area, the E4A-3K may malfunction. Turbulence MOUNTING Air curtain E4A-3K Securely mount the E4A-3K by using the nuts provided with the E4A-3K or the mounting holes of the E4A-3K. Refer to Dimensions for details. Do not subject the Sensor to heavy impact, shock, or vibration (see Specifications) or the E4A-3K will no longer be water-resistant. If the E4A-3K is not mounted securely, it may be damaged by vibration or may not detect sensing objects accurately due to a possible change in the mounting position. The jetting sound of air nozzles includes noise of a wide frequency range, which will affect the operation of the E4A-3K. Do not use an air nozzle near the E4A-3K. The sensing distance of the E4A-3K will decrease if there is any water drops on the surface of the emitter or receiver. The reflective model may not detect any objects if there is any object absorbing sound, such as powder and cotton, on the surface of the emitter or receiver. NOTE: DIMENSIONS SHOWN ARE IN MILLIMETERS. To convert millimeters to inches divide by 25.4. OMRON ELECTRONICS, INC. OMRON CANADA, INC. One East Commerce Drive Schaumburg, IL 60173 885 Milner Avenue Scarborough, Ontario M1B 5V8 1-800-55-OMRON 416-286-6465 Cat. No. CEDSAX3 10/99 Specifications subject to change without notice. Printed in U.S.A.