Ultrasonic Proximity Sensor E4B Capable of Setting the Sensing Range Using an Ultrasonic Beam Ensures the stable detection of a variety of objects regardless of the color, transparency, or material (metallic or non-metallic) of the objects. Limits the ultrasonic beam width to 8°, thus detecting minute objects as small as 2 x 2 cm. Detects objects smoothly while largely suppressing interference from background objects. Sealed to resist dust and dirt and emits ultrasonic waves at a frequency of approximately 200 kHz, thus providing high immunity from impact and environmental noise. Ordering Information Output configuration DC switching NPN (normally open or closed selectable) Sensing method Sensing distance Through-beam Model E4B-TS50E4 50 cm E4B-T1E4 100 cm Reflective Convergent reflective (Distance adjustable) E4B-LS20E4 5 to 20 cm E4B-LS70E4 20 to 70 cm Convergent reflective (Zone setting) 20 to 70 cm E4B-RS70E4 Sensing zone 1 E4B E4B Sensing Method Detects the attenuation or interrupted condition of the ultrasonic beam caused by the object E4B-TjS Emitter passing between the Emitter and Receiver. Through-beam Reflective Convergent reflective distance Detects only the beam reflected from the object existing within the sensing distance range set with the distance adjuster. Sensing object E4B-TjR Receiver Distance adjustment E4B-LSj Unstable range Convergent reflective zone Sensing object passing zone Detects the object with the interruption of the normal beam reflected from the reflector. Sensing object passing zone Sensing distance adjustable range E4B-RS70 Sensing object Convergent reflective Detects only the beam reflected from the object existing in the sensing range set with the distance selector. Reflector E4B-RS70 Unstable range Note: Sensing object Sensing object An object may be detected due to multiple reflection if the object is in the unstable range where the distance adjuster is ineffective, in which case however, the detection of the object will not be stable. Therefore, do not attempt to use the E4B to detect an object in the unstable range. Application Examples Detection of a variety of transparent bottles in bottle manufacturing, drink processing, and food processing lines Detects the absence or jamming of bottles 2 Detection of fluorescent lamps Detects fluorescent lamps with the Sensor mounted aslant. E4B E4B Specifications Ratings/Characteristics Model E4B-TS50E4 Sensing method Through-beam Sensing distance 50 cm E4B-T1E4 1m E4B-LS20E4 E4B-LS70E4 Convergent reflective zone 5 to 20 cm 20 to 60 cm (20 to 70 cm) (see note 1) (in 10-cm divisions) 20 to 60 cm (20 to 70 cm) (see note 1) Item 12 to 24 VDC ± 10% (10.8 to 26.4 VDC) with a max. ripple ±10% (p-p) Supply voltage Current consumption E4B-RS70E4 Convergent reflective distance 12 VDC 24 VDC Emitter: 155 mA max. Receiver: 30 mA max. Emitter: 70 mA max. Receiver: 30 mA max. 100 mA max. Emitter: 80 mA max. Receiver: 30 mA max. Emitter: 50 mA max. Receiver: 30 mA max. 50 mA max. Standard sensing object 10 x 10 cm flat plate 4 x 4 cm flat plate Differential travel --- 20% max. of sensing distance 3 cm max. ±8° max. Directional angle (see note 2) Ultrasonic oscillation frequency Approx. 200 kHz Response frequency (see note 4) 50 Hz Operating mode Incident or interrupted (selectable) 10 Hz 50 Hz Control output NPN, 100 mA at 30 VDC (with a residual voltage of 1.5 V max.) and an output resistance of 4.7 kΩ Indicators SENSING indicator (red LED) and STABILITY indicator (green LED) Ultrasonic speed compensation 20 Hz No Yes Ambient temperature Operating: –10°C to 55°C Ambient humidity Operating: 35% to 95% Temperature influence ±10% max. of sensing distance at 20°C in the temperature range of –10°C and 55°C Voltage influence ±5% max. of sensing distance at a voltage between 90% and 110% of the rated power supply voltage Residual voltage 1.5 V max. under a load current of 100 mA and a cord length of 2 m Insulation resistance 20 MΩ min. (at 500 VDC) between current carry parts and case Dielectric strength 1,000 V (50/60 Hz) for 1 min between current carry parts and case Vibration resistance Destruction: 10 to 55 Hz, 1.5-mm double amplitude for 2 hours each in X, Y, and Z directions Shock resistance Destruction: 500 m/s2 (approx. 50G) 3 times each in X, Y, and Z directions. Degree of protection (see note 3) IEC IP66 (JEM IP66 water resistive) Weight (with 2-m-long cord and Mounting Bracket) Approx. 600 g (with Emitter and Receiver) Note: Approx. 300 g 1. These are the available sensing distances at an ambient temperature range between 0°C and 45°C. 2. This is the half-value angle obtainable at a signal of –6 dB. 3. The enclosure rating indicates the degree of protection of the case, which will depend on the operating condition. 4. The response frequencies are values obtained with the E4B used for detecting a rotating propeller-shaped disc as shown on the right. Space:Blade = 1:1 3 E4B E4B Engineering Data E4B-T1E4: Sensitivity adjuster set to Max. E4B-TS50E4: Sensitivity adjuster set to Max. Sensitivity adjuster: Adjust with stable incident. Sensitivity adjuster: Adjust with stable incident. Sensing position X (cm) (from Receiver) Note: E4B-LS20E4 Sample: Round pipe that is 10 cm long min. Sensing distance (cm) The curve with the sensitivity adjuster Note: set to maximum indicates the size of the sensing object. Sensing distance (cm) Sensing distance (cm) Standard sensing object (40 x 40 flat plate) E4B-LS70E4, E4B-RS70E4 Sample: Round pipe that is 10 cm long min. Operating distance (cm) The sensing method will change when the sensing distance exceeds 10 cm. As a result, the detectable diameters will change greatly. Operating Range Diagram (Typical) E4B-LS20E4 Dia. (d) of sensing object or length (W) of one side in cm. Sensing object size (cm) Sensing position Operating Distance vs. Sensing Object Angle (Typical) E4B-LS70E4, E4B-RS70E4 Standard sensing object (40 x 40 flat plate) 55-dia. rod 30-dia. rod E4B-LS70E4, E4B-RS70E4 Angle θ ( ) E4B-TS50E4, E4B-T1E4 Dia. (d) of sensing object or length (W) of one side in cm. Operating Distance vs. Sensing Object Size (Typical) ° Angle θ E4B-LS70 E4B-RS70 Sensing object Distance X Stable operating range Operating distance X (cm) Sensing distance (cm) Sensing distance (cm) Sensitivity Adjuster Position vs. Parallel Movement Characteristics E4B-LS70E4, E4B-RS70E4 E4B-T1E4 Operating distance Y (cm) Variation rate of sensing distance (%) Ambient Temperature vs. Variation Rate of Sensing Distance (Typical) Ambient temperature (°C) 4 VR: Max. VR: Center VR: Min. Note: Setting distance X (cm) Obtain the point that turns Y1 and Y2 ON while changing the sensing distance (X). E4B E4B Adjustments Indicators 1. STABILITY Indicator (Green) When this indicator is lit, the ultrasonic input into the Receiver is sufficient, or its interruption is small enough, to ensure the smooth operation of the E4B. Do not operate the E4B when this indicator is not lit. 2. SENSING Indicator (Red) When this indicator is lit, the Receiver has ultrasonic input. Indicator of Through-beam Emitter 1. Incident Indicator Lit when there is ultrasonic input. To use this indicator of the Emitter as an SENSING indicator like the indicator on the Receiver, connect the black lead wires of the Emitter and Receiver together. Load 100 mA max. Black Black Emitter Receiver Blue Blue +12 to 24 V 0V Brown Note: +12 to 24 V 0V Brown Be sure not to make mistakes in polarity when connecting the above wires. In other words, both brown lead wires must connect to +DCV or 0 V and both blue lead wires must connect to 0 V or +DCV. Otherwise, the indicator of the Emitter will be lit when the ultrasonic beam is interrupted. 2. Power Indicator Lit when the E4B is turned ON. If the above connections are not possible (e.g., the Receiver and Emitter use different power supplies), this indicator will be used as a power indicator. Connections of Black (White) Lead Wire of Emitter Power connection example Short-circuited Brown: +DCV Blue: 0 V 0 V blue Brown: 0 V Blue: DCV +DCV blue Note: The indicator will not be lit if the above wires are not connected correctly. 5 E4B E4B Beam Axis, Sensitivity, and Distance Adjustments 1. E4B-T1 and E4B-TS50 Through-beam Models Set the SENSITIVITY adjuster of the Receiver to maximum. Move the Emitter and Receiver vertically and horizontally until the SENSING indicator of the Receiver is lit and secure the Emitter and Receiver at the midpoint of the range within which the STABILITY indicator is lit. Range in which the STABILITY indicator (green) is lit Optimum line Range in which the SENSING indicator (red) is lit Pass the sensing object through the sensing range and adjust the sensitivity so that the SENSING indicator turns ON and OFF according to the presence or absence of the sensing object while the STABILITY indicator is lit continuously. If the STABILITY indicator is not lit while the Sensor is in operation, this may indicate a possible operational error. Check or readjust the sensitivity. If the Emitter and Receiver are set at a distance shorter than the rated sensing distance, reduce the sensitivity to within the range in which the STABILITY indicator is lit. This will increase the immunity of the Sensor against noise. The parallel movement characteristics (i.e., the mutual interference distance) and sensing object size vary with the sensitivity adjustment. Refer to Engineering Data and make the optimum adjustments. 2. E4B-LS20* and E4B-LS70 Convergent Reflective Distance Model Locate the Sensor so that both the STABILITY and SENSING indicators will be lit when the sensing object is placed at the sensing position, and the STABILITY indicator will be lit and the SENSING indicator will turn OFF when the sensing object is removed. Step 1 2 3 Distance adjuster Adjustment procedure Place the sensing object at the sensing position and turn the distance adjuster clockwise gradually until both the SENSING and STABILITY indicators are lit. Background Sensing object Background Sensing object Background Sensing object Sensing --- --- Move the Emitter and Receiver vertically and horizontally and secure the Emitter and Receiver at the midpoint of the range within which the STABILITY indicator is lit. Remove the sensing object and check that the SENSING indicator is OFF and the STABILITY indicator is continuously lit. Note: If the STABILITY indicator is not lit while the Sensor is in operation, this indicates a possible operational error. Check or readjust the sensitivity. Note: *E4B-LS20 The sensing distance is adjustable within a range of 10 to 20 cm with the distance adjuster. Position of distance adjuster Set to the position 5-20. The distance range will be 5 to 23 cm in this case due to the characteristics of the ultrasonic beam. 10 to 20 cm The adjuster can be set freely within a range of 10 to 20 cm. The object can be detected within a range of 5 to 10 cm in this case due to multiple ultrasonic reflection. Separate them 30 cm min. Unstable range 6 Background E4B-LS20 5 to 10 cm Sensing object Sensing distance Setting sensing range (cm) E4B E4B 3. E4B-RS70 Convergent Reflective Zone General Use Locate the Sensor so that both the STABILITY and SENSING indicators will be lit when the sensing object is placed at the sensing position and the STABILITY indicator will be lit and the SENSING indicator will be off when the sensing object is removed. Step 1 2 3 Distance selector Adjustment procedure Note: Place the sensing object at the sensing position and turn the distance selector clockwise gradually until both the SENSING and STABILITY indicators are lit. Background Sensing object Background Sensing object Background Sensing object Sensing --- --- Move the Emitter and Receiver vertically and horizontally and secure the Emitter and Receiver at the midpoint of the range within which the STABILITY indicator is lit. Remove the sensing object and check that the SENSING indicator is OFF and the STABILITY indicator is continuously lit. 1. If the STABILITY indicator is not lit while the Sensor is in operation, this indicates a possible operational error. Check or readjust the sensitivity. 2. If the background object is within a distance of 1.5 m from the sensing head, the SENSING indicator may be lit and the STABILITY indicator may not be lit in spite of the absence of the sensing object. In such a case, give priority to the adjustment of the indicators with the sensing object located at the sensing position. Retroreflective Use The retroreflective model assures the stable detection of objects under irregular and unstable reflection conditions (e.g., if the sensing objects are different in surface or size, if they are passed through diagonally, or if they are warped or move in a wave-like way). E4B-RS70 Reflector The Reflector must be at least 4 x 4 cm in size and made of a material that is efficiently reflective (such as a metal plate). The E39-R1 for photomicrosensors is ideal. Be sure that the reflector is not set within the sensing range. Set the distance selector to the desired position, fix the reflector around the midpoint of the set sensing range, and check that both the SENSING and STABILITY indicators are lit. Sensing range (20 to 55 cm) ȏ: Near the midpoint of the sensing range (e.g., 45, 55, or 65 cm) Step Sensing 1 2 3 Set zone Reflector Reflector Distance selector Adjustment procedure Set the distance selector to the desired zone position, mount the Reflector at or near the midpoint of the set zone, and confirm that both the STABILITY and SENSING indicators are lit. Sensing object Reflector --- --- Move the Emitter and Receiver vertically and horizontally and secure the Emitter and Receiver at the midpoint of the range within which the STABILITY indicator is lit. Remove the sensing object and check that the SENSING indicator is OFF and the STABILITY indicator is continuously lit. 7 E4B E4B Note: 1. If the STABILITY indicator is not lit while the Sensor is in operation, this indicates a possible operational error. Check or readjust the sensitivity. 2. If the sensing object is in position A parallel to the Reflector as shown above, the SENSING indicator may be lit and the STABILITY indicator may not be lit depending on the position of the sensing object. In such a case, give priority to the adjustment of the STABILITY indicator when the beam is incident by means of the reflector. Operation Output Circuits NPN Models Switching DC Incident (Power supply polarity: Brown: +; Blue: 0 V) +V Brown Light incident Light incident Load Proximity Sensor main circuit Light interrupted Light interrupted Black STABILITY indicator (red) Interrupted (Power supply polarity: Brown: 0 V: Blue: +) ON STABILITY indicator (red) OFF Blue Operate Operate Note: 1. 100 mA max. (load current) 2. Required when the transistor circuit is connected. Load (relay) Load (relay) Release OFF Output transistor Output transistor 0V ON (Brown ↔ Black) Output voltage (logic) (Blue ↔ Black) Release Output voltage (logic) (Blue ↔ Black) (Brown ↔ Black) Dimensions Note: All units are in millimeters unless otherwise indicated. E4B-TS50 E4B-T1 E4B-LS20 E4B-LS70 E4B-RS70 Two, M4 x 45 4.5 dia. (See note) Note: 8 Vinyl-insulated round cord with three conductors, 6 dia.; standard length: 2 m E4B E4B Precautions Correct Use Sensor Mounting Angle If the E4B 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 E4B 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 beam will be reflected by such objects. Mounting Securely mount the E4B by using the nuts provided with the E4B or the mounting holes of the E4B. Refer to Dimensions for details. Do not strike the Sensor with any hammer or other object, otherwise the E4B will no longer be water-resistant. If the E4B is not mounted securely, the E4B may be damaged by vibration or may not detect sensing objects accurately due to a possible change in the mounting position. Environmental Conditions Do not use the E4B at a temperature exceeding the rated range or outdoors, otherwise the reliability and life of the E4B will decrease. The Ultrasonic Reflective Sensor utilizes the air as a beam transmission media. Do not use the E4B in places with radical convection or extreme local temperature changes. For example, if there is a hot air curtain that causes turbulence within the sensing area, the E4B may malfunction. Turbulence Air curtain Emitter Receiver The jetting sound of air nozzles includes noise of a wide frequency range, which will affect the operation of the E4B. Do not use an air nozzle near the E4B. The sensing distance of the E4B will decrease if there is any water drops on the surface of the emitter or receiver. The through-beam 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. 9 E4B 10 E4B E4B E4B 11 E4B E4B ALL DIMENSIONS SHOWN ARE IN MILLIMETERS. To convert millimeters into inches, multiply by 0.03937. To convert grams into ounces, multiply by 0.03527. Cat. No. D65-E1-1 In the interest of product improvement, specifications are subject to change without notice. OMRON Corporation Industrial Sensors Division Sensing Devices and Components Division H.Q. 28th Fl., Crystal Tower Bldg. 1-2-27, Shiromi, Chuo-ku, Osaka 540-6028 Japan Phone: (81)6-949-6012 Fax: (81)6-949-6021 12 Printed in Japan 0398-1M (0398) a