Light convergent reflective type sensor B5W-LB series User manual
１ Outline This user manual describes usage guidance and special matters regarding the light convergent reflective sensor; B5W-LB series. This document makes supplementary statements to the data sheet and the product specification sheet. Therefore, please read this manual in order to effectively use the sensors within your actual application. The following table shows the product line of the B5W-LB series.
３ Outline dimensions The outline dimensions of the B5W-LB series are shown below. Please refer to the data sheet for more details. (1) Super miniature type: B5W-LB11 series (2) Miniature type: B5W-LB21 series Emitter/ Receiver lens Emitter/ Receiver lens Size: 40mm X 8.4mm X 15.9mm Size: 26mm X 8.4mm X 13mm For wiring, connector with cable: EE-5002 1M can be provided as an optional accessary.
5 Usage guidance (Detection) Analog and digital output models are lined up in the miniature type B5W-LB series. Both models have the same optical characteristics. In order to provide a better understanding of B5W-LB series, the analog output model will be explained first. 5.1 Analog output model The table “Electrical and Optical Characteristics” mentioned in the data sheet of B5W-LB2101 is shown below. The sensor can be used in any application which requires detection of a wide variety of objects.
In the case of detecting small objects, or background objects existence: Ideally, the size of the actual object to be sensed must be bigger than the emitter's lighting spot. Since the B5W-LB series carries an infrared LED, the light spot is invisible. However the size of the spot can be checked according to “Spot diameter-distance characteristics” (reference value) or “Operating range” (reference value).
5.2 Digital output model “Receiver output – Sensing distance characteristics” is the most suitable graph to understand the sensing ability of optical sensors. The vertical axis of this graph shows excess gain of receiver output. Excess gain 1 is equal to the threshold level of the sensor. According to the graph of B5W-LB21, the detectable area for black paper is the distance from the crossing point of excess gain 1 and the characteristic curve to the other crossing point.
6 Usage guidance ( external circuit ) 6.1 Analog output model The B5W-LB series is designed to detect dark colored objects with a relatively greater LED current. Therefore, the LED should be driven by a pulsed current in order to minimize the stress imposed on the LED and to increase the life of the LED. Additionally the pulsed LED circuit can be used for a cancellation process (with external circuit), alleviating the effects of external light interference.
(2) Sampling timing for sensor output Considering the sensor response time, the recommended sampling timing of sensor output is shown below; -Vout(OFF): Output voltage when LED is turned off *The sampling timing for Vout(OFF) : 1,000 micro sec. after the end point of LED pulse -Vout(ON): Output voltage when LED is turned on *The sampling timing for Vout(ON): 1,600 micro sec. after the end point of LED pulse ＊The time till the sensor output becomes stable is 400 micro sec. or less.
(4) Others, reference data The influence to sensing distance by ambient temperature: The sensing distance of B5W-LB will be changed by ambient temperature. The reference data is shown below. Reference The average consumption current: In the case that this sensor is operated with the recommended input pulse, the average current consumption is approximately 32 mA. 6.2 Digital output model The digital output model contains an LED driving circuit and a dedicated photo IC (with fixed threshold level).
７ Mounting instruction 1. The B5W-LB series can be mounted in 2 potential ways (X,Y direction). Please refer to the data sheet for further detail. * Please use M3 screw, spring washer, and flat washer with tightening torque of 0.54 N-m. 2. The B5W-LB series contains a special circuit that reduces the influence of external light interference. However, it is recommended that designers create proper equipment design in which any direct or indirect external disturbing light does not hit the sensor.
4. Regarding wiring, please refer the followings. The wire harness of EE-5002 1M is provided for the digital output models. It can not use for analog output model. The wire length should be basically designed 2 m max. In the case of longer wiring, please put a capacitor more than 10 micro F ( ex. Aluminum electrolytic one) within 2 m. Please see data sheet for more details.
9 Warranty, Limitations of Liability 9.1 Warranty, Limitations of Liability Warranties Exclusive Warranty Omron’s exclusive warranty is that the Products will be free from defects in materials and workmanship for a period of twelve months from the date of sale by Omron (or such other period expressed in writing by Omron). Omron disclaims all other warranties, express or implied.
9.2 Application Considerations Suitability of Use Omron Companies shall not be responsible for conformity with any standards, codes or regulations which apply to the combination of the Product in the Buyer’s application or use of the Product. At Buyer’s request, Omron will provide applicable third party certification documents identifying ratings and limitations of use which apply to the Product.
