Thru-beam Type Ultrasonic Sensor US-N300 Thru-beam Type ULTRASONIC SENSOR US-N300 Suitable for Detecting Transparent Films or Transparent Bottles Reliable Detection of Transparent Objects Only 16mm thick Simple Operation Mode Selection The sensor reliably detects transparent films or transparent objects. Its 16mm thick compact body allows mounting in a narrow space. The operation mode can be selected either sound-received-ON or soundblocked-ON simply by changing the connection of the control input wire. Detecting transparent bottles Detecting transparent and opaque objects APPLICATIONS Detecting transparent film or transparent glass 752 ORDER GUIDE Sensing range 300mm Model No. Thru-beam Type US-N300 Appearance Thru-beam Type US-N300 SPECIFICATIONS Type Item Thru-beam Model No. US-N300 Sensing range 300mm Sensing object Transparent, translucent or opaque object: 2020mm or more, Hole: 1010mm or more Supply voltage Current consumption Output Output operation 12 to 24V DC10% Ripple P-P 10% or less Transmitter: 35mA or less, Receiver: 35mA or less NPN transistor universal * Maximum sink current: 100mA * Residual voltage: 1V or less (at 100mA sink current) Selectable either sound-received-ON or sound-blocked-ON by the control input Short-circuit protection Incorporated Response time 5ms or less Operation indicator Red LED (lights up when the output is ON) Sensitivity adjuster Continuously variable adjuster Transmission frequency 220kHz approx. Environmental resistance Protection Ambient temperature IP62 (IEC) 0 to50C (No dew condensation), Storage:25 to70C 35 to 85% RH, Storage: 35 to 85% RH Ambient humidity Noise immunity Voltage withstandability Power line: 1,000Vp, and 1!s pulse width; Radiation: 2,000Vp, and 1!s pulse width (with noise simulator) 1,500V AC for one min. between all supply terminals connected together and enclosure Insulation resistance 20M, or more, with 500V DC megger between all supply terminals connected together and enclosure Vibration resistance 10 to 55Hz frequency, 1.5mm amplitude in X, Y and Z directions for two hours each Shock resistance 100m/s2 acceleration (10G approx.) in X, Y and Z directions for three times each Enclosure: Polycarbonate Material Cable Cable extension Weight Accessories 0.2mm2 ULTRASONIC SENSOR US-N300 4-core (transmitter: 2-core) cabtyre cable, 2m long Extension up to total 100m is possible, for both transmitter and receiver, with 0.2mm2, or more, cable. Transmitter: 80g approx., Receiver: 85g approx. MS-N30 (Sensor mounting bracket): 2 sets, Adjusting screwdriver: 1 No. 753 I/O CIRCUIT AND WIRING DIAGRAMS I/O circuit diagram Wiring diagram Color code (Brown)V US-N300 Thru-beam Type Sensor circuit D2 Brown D1 Load 4.7k (Black) Output Tr Load 12 to 24V DC 10% Black 100mA max. (Blue) 0V ZD Blue m1 m1 (Pink) Control input Pink Internal circuit Users' circuit Note: The transmitter has only two power supply wires (V and 0V). m1 Non-voltage contact, NPN open-collector transistor or NPN non-contact transistor Symbols ... D1: Reverse supply polarity protection diode D2: Reverse current protection diode ZD: Surge absorption zener diode Tr : NPN output transistor or or Low (0.5 to1.5V, or connected to 0V): sound-received-ON High (6V to supply voltage, or open): sound-blocked-ON SENSING CHARACTERISTICS (TYPICAL) Parallel deviation Angular deviation Sensing field 400 400 400 300 # 200 Transmitter L 100 Receiver Setting distance L (mm) Setting distance L (mm) Receiver 5050mm Setting distance L (mm) ULTRASONIC SENSOR US-N300 300 200 100 Transmitter $ L 300 # Sound insulation board L 200 Transmitter 100 Receiver 0 40 754 20 0 20 Center Left Right Operating point#(mm) 40 0 40 20 0 20 Center Left Right Operating angle $( ) 40 0 20 10 0 10 Center Left Right Operating point #(mm) 20 12 to 24V DC 10% This product is not a safety sensor. Its use is not intended or designed to protect life and prevent body injury or property damage from dangerous parts of machinery. It is a normal object detection sensor. Mounting * The tightening torque should be 0.49Nm or less. Influence of surrounding objects Influence of an object parallel to the sensing axis * If there is a wall or a curtain near the sensing axis, the sound reflection may cause the operation to be unstable. <Countermeasure> Sensing axis Transmitter Receiver Keep a distance of 20mm or more Wall or curtain Influence of background objects 2-M415mm screws with washers * If sensor heads are installed as shown in the figure below, the operation may become unstable by the reflected sound wave. Sensor mounting bracket MS-N30 (Accessory) Sensitivity adjustment * Normally, use the sensor at the maximum sensitivity. However, if the sensing is not proper due to surrounding objects (reflection from surrounding objects, etc.), adjust the sensitivity as follows. Object absent Transmitter Object Transmitter Background Transmitter Sensing object Receiver Placed perpendicular to the sensing axis. <Countermeasure> Object present Receiver An object, hard and plain like a glass plate, reflects the sound wave. Receiver The receiver should be placed away from the object and at an angle to it as shown below. Receiver 10 approx. Transmitter Object sound-received state sound-blocked state 1 Set the adjuster to Min. Then, without any sensing object, turn the adjuster gradually clockwise, while seeing the operation indicator, to determine the point where the sensor enters the `sound-received state'. 2 With a sensing object between the sensor heads, turn the adjuster further clockwise until the sensor enters the `sound-received state' again. Then, turn the adjuster back a little to determine the point where the sensor just enters the `sound-blocked state'. 3 Set the adjuster at the center of the two points described in 1 and 2, which is the optimum sensitivity position. Mutual interference * When two or more sensors are mounted closely, the sensors may not enter the `sound-blocked state' due to mutual interference. <Countermeasure> Parallel mounting Receiver Transmitter Face-to-face mounting 1 Transmitter Receiver Transmitter Receiver Optimum sensitivity sound-received state without sensing object Keep a distance of 10mm or more sound-blocked state with sensing object 2 Sensing range Transmitter Receiver Keep a distance of 100mm or more Min. Transmitter Receiver Receiver Transmitter Transmitter Back-to-back mounting is possible. Max. Sensitivity adjuster 755 ULTRASONIC SENSOR PRECAUTIONS FOR PROPER USE Thru-beam Type US-N300 US-N300 ULTRASONIC SENSOR US-N300 Thru-beam Type US-N300 PRECAUTIONS FOR PROPER USE Traveling speed and minimum sensing object width * Minimum sensing object width is 2020mm in the stationary condition. The minimum sensing width of a traveling object is related to the traveling speed and the sensor response time by the following formula. W: Minimum sensing object width (m) WVTA (m) V : Traveling speed of the object (m/sec.) T : Sensor response time0.005 (sec.) A : Minimum sensing object width in the stationary condition0.02 (m) Example: If V10m/sec. W100.0050.020.07m 70mm Wiring * Make sure to carry out the wiring in the power supply off condition. * Verify that the supply voltage variation is within the rating. * If power is supplied from a commercial switching regulator, ensure that the frame ground (F.G.) terminal of the power supply is connected to an actual ground. * In case noise generating equipment (switching regulator, inverter motor, etc.) is used in the vicinity of this product, connect the frame ground (F.G.) terminal of the equipment to an actual ground. * Do not run the wires together with high-voltage lines or power lines or put them in the same raceway. This can cause malfunction due to induction. Others * Do not use during the initial transient time (50ms) after the power supply is switched on. * The ultrasonic sound propagates through the air. If the sensor is used at a place where air blows or the temperature suddenly changes (near a door, an air conditioner, etc.) the operation may become unstable. Avoid using US-N300 at such places. * Take care that the sensor may malfunction due to an intense extraneous sound, such as, metal impact sound. * Do not expose the transmitting element or the receiving element to moisture or dust. It may affect the sensing operation. DIMENSIONS (Unit: mm) US-N300 Sensor 12.6 12.1 8.3 7.4 Sensitivity adjuster (receiver only) Operation indicator (Red) (Receiver only) 20 28 (2) 16 13 60 43 2-M40.7 thru-hole threads 7.5 4 "4.8 cable 2m long "13 20 MS-N30 Sensor mounting bracket (Accessory) 4.3 19 12 4 4.3 20 Assembly dimensions Mounting drawing 4 with the receiver 4 20 4.3 4 4.3 30 20 8 (2) 39 32 28 37 32 20 12 t2 4-"4.3 holes 88 75 Material: Cold rolled carbon steel (SPCC) Two M4 (length 15mm) screws with washers are attached. 32 28 12 5 756 t2 4-"4.3 holes 20 30 19 5 35 39