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.
The connection diagram and the internal circuit of B5W-LB2101 are shown below:
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B5W-LB2101 Internal circuit
B5W-LB Light convergent reflective type sensor User’s manual (E592)
6 Usage guidance ( external circuit )
6.1 Analog output model
(1) LED pulse signal input
The recommended pulse signal into the terminal (Connector pin: #1) is shown below.
Notes: *On time (Pulse width): When pulsing the LED, the output becomes stable within 400 micro sec., max.
Therefore 800 (>> 400) micro sec. of on time is recommended, to ensure
proper operation.
**Duty cycle: According to the LED characteristics, duty cycle should be 40% or less.
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