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Frequently asked questions
B5W-LB Light convergent reflective type sensor User’s manual (E592)
Question: Can the analog output type distinguish between different kinds of objects?
Answer : The B5W-LB series has a special optical design which can detect a variety of objects in the
sensing area. However, the sensors can not distinguish between the kinds of objects that are
sensed, using the difference in the reflection factors of the objects. Please, refer to 4 - Product
features.
Question: The analog output type has a variable resistor. Can it adjust the sensor’s sensitivity?
Answer : This variable resistor is used only for our internal inspection. You should not alter its position, which is
set by the factory. Otherwise the sensor will not meet Omron’s guaranteed product specifications.
Instead, please set a threshold level for your specific application, using actual objects to be sensed.
Regarding the threshold level setting, please, refer to 6 - Usage guidance (external circuit).
Question: What is the minimum size of object to be sensed?
Answer : The object should be larger than the emitter’s light spot, which varies with distance. Since the B5W-LB
series uses an infrared LED, the light spot is invisible. So please refer to “Spot diameter-distance
characteristic” or “Operating range” on the data sheet. Please, refer to 5 - Usage guidance (Detection) .
Question: What is the procedure when the sensor is influenced by external disturbing light interfernce?
Answer : The digital output type of B5W-LB contains a special circuit that minimizes the influence of disturbing
lights. However please implement a mechanical design which prevents any external disturbing light
from penetrating into the light receiving surface of the sensor. In the case of that the sensor must be
exposed to ambient lights, please refer to 7 - Mounting instruction (No.2).
Question: Can this sensor detect reflective objects (mirror, glass plate) inclined at varying angles?
Answer : B5W-LB series has a special optical design which has a narrow and strong light beam. If a reflective
object is tilted against the light receiving surface of the sensor, the specular light will not return to
the sensor. So in the case of detecting glossy objects, the objects should be set parallel to the sensor.
For further details, please see 5 - Usage guidance (Detection).
Question: Is it possible to put a transparent cover in front of the sensor for dust/water prevention purpose?
Answer : The B5W-LB series will detect a transparent plate. It is better to avoid using covers. When absolutely
necessary, the transparent cover should be closely attached on the sensor. For details, please
see 7 - Mounting instructions (No.3).
Question: Is the wire harness for B5W-LB series commercially available?
Answer : A wire harness (with 1 m long wires) for the digital output types is available. The part number is
EE-5002 1M. However a wire harness for the analog output types is not available. The datasheet
provides information about the mating connectors you would use for connection to your circuit.
Question: How long can the connecting wires be extended?
Answer : We recommend that the longest wire length should be no more than 2m. If longer wires are necessary,
please use capacitors according to the instructions described on the product specification sheet.
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.
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