Fiber Optic Amplifier BF4RP

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230.00 Grams
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1 unit
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The BF4 series fiber optic amplifiers feature high-speed response times and various functions to provide reliable detection of small or fast-moving targets. The units feature convenience functions such as auto-sensitivity adjustment and advanced features including mutual interference prevention and self-diagnosis function. The amplifiers can be used together with fiber optic cables from Autonics for optimal performance.

BF4R from Autonics is a digital display fiber optic amplifier with PNP output, auto-tune, and beam source: Red LED (660nm).

BF3RX from Autonics comes with the following properties:

  • High-speed response. Max. 0.5ms.
  • Auto-sensitivity setting (button setting)/Remote sensitivity setting.
  • External synchronization input, mutual interference protection, self-diagnosis.
  • Reverse power polarity and short-circuit (over-current) protection circuit.
  • Timer function: selectable none/40ms OFF delay timer (fixed).
    (standard type, remote sensitivity setting type only)
  • Automatically selectable Light ON/Dark ON.
  • Precise detection of small targets and complicated places to install.

Product Specifications



  • Response frequency

Max. 0.5ms (frequency 1). Max 0.7ms (frequency 2).

  • Power supply.

12-24VDC ±10% (Ripple P-P: Max 10%).

  • Current consumption

Max. 45mA.

  • Light source

Red LED (Modulated).

  • Sensitivity Adjustment

Sensitivity Adjustment button (ON/OFF).

  • Operation mode

Automatic selection of Light ON/Dark ON accordance with button setting.

  • Control output

NPN/PNP open collector output.

  • Load voltage max. 30VDC.
  • Load current max. 100mA.
  • Residual voltage –NPN: Max. 1V (load current 100mA), Max 0.4V (load current 16mA)/PNP: Max 2.5V.
  • Self-diagnosis output

On state under unstable setting (when the target stays for 300ms in the unstable area)

On state when control output short-circuited.


  • Load voltage max. 30VDC.
  • Load current max. 50mA.
  • Residual voltage –NPN: Max. 1V (load current 50mA), Max 0.4V (load current 16mA)/PNP: Max 2.5V.
  •  Input of stop transmission function


  • External synchronization function


  • Remote sensitivity setting function


  • Protection circuit

Reverse polarity protection, output short-circuit (over-current) protection circuit.

  • Interference prevention function

Built-in differential frequency mode (set by frequency 1 or 2 by on/off button).

  • Indicator

Operation indicator: Red LED. Stability indicator: Green LED ON when the target stays in stable sensing level.

  • Timer function (Selectable)

Built-in OFF delay timer, Approx 40ms fixed.

  • Insulation resistance

Min 20MΩ (500VDC mega).

  • Noise strength

The square wave noise by noise simulator (Voltage ±240V. period 10ms. Pulse width 1µs).

  • Dielectric strength

1000VAC 50/60 Hz for 1 min.

  • Vibration

1.5mm amplitude at a frequency of 10~55Hz in each of X, Y, Z directions for 2 hours.

  • Shock

500m/s2 (50G) in X, Y, Z directions for 3 times.

  • Ambient illumination

Sunlight: max. 11,000Ꙇx.Incandescent lamp: max. 3000Ꙇx.

  • Ambient temperature

-10~+50◦C (at non-freezing status).

  • Storage temperature


  • Ambient humidity

35~85 RH.

  • Storage humidity

35~85 RH.

  • Material

Case: heat resistant ABS. Cover PC.

  • Cable

Ø4 4-wire, Length: 2M.

(AWG22, core diameter: 0.08mm. no. of cores: 60. Insulator out diameter: Ø1.25mm).

  • Unit weight

Approx. 65g.


Brand Information

“Autonics” is a leading provider of automation solutions from South Korea. They develop and manufacture a wide range of automation products that are marketed worldwide. Their core products include various sensors, controllers, and motion devices, measuring equipment, laser marking systems, connection equipment, and more. Autonics products are trusted and adopted by engineers in various industrial applications and their technology is widely applied in day-to-day automation devices.

With 12 international offices in South Korea, China, Japan, India, Vietnam, Indonesia, Malaysia, Russia, Turkey, USA, Brazil, Mexico, Autonics is able to provide comprehensive automation solutions for their customers across the globe.

Data Sheet

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Warranty Information

One Year Warranty
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