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Does the FT-R43 fiber optic sensor have both lights on

Does the FT-R43 fiber optic sensor have both lights on

HOME / Does the FT-R43 fiber optic sensor have both lights on

Does the FT-R43 fiber optic sensor have both lights on - BENNIE OPTICAL [PDF]

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The FT-R43 has separate emitter and receiver units, and typically only the receiver LED lights up when the beam is properly aligned and unblocked.

The FT-R43 is a through-beam fiber optic sensor consisting of an emitter and a receiver pair, designed to detect objects by interrupting the light beam between them (Panasonic) . In normal operation:

  • The emitter continuously sends a light beam toward the receiver.
  • The receiver detects the beam and usually has an LED indicator that lights up when the beam is received.
  • If the beam is blocked, the receiver LED turns off or changes color depending on the model. Typically, only the receiver LED is used to indicate the sensing status, while the emitter may not have a visible light indicator. Some models may have a power LED on the emitter, but both lights are not necessarily on simultaneously during normal operation. The exact LED behavior can vary depending on the sensor configuration and wiring, so consulting the FT-R43 datasheet or user manual is recommended for precise diagnostic information (Panasonic Semiconductor) . Key points for troubleshooting or verification:
  • Ensure the emitter and receiver are properly aligned.
  • Check that the receiver LED lights up when the path is clear.
  • If the receiver LED does not light, verify power supply and fiber connections.
  • Some FT-R43 units may include a separate power indicator on the emitter, which could appear as a second light. In summary, both lights are not necessarily on at the same time; the receiver LED indicates beam reception, while the emitter may or may not have a visible indicator depending on the specific unit.
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