Digital Fiber Optic SensorsFS-N series (FS-neo)


Fiber Amplifier, M8 Connector Type, NPN


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IP66 Fiberoptic Amplifier, 1 output type



I/O format

M8 connector *1

Main unit/expansion unit

Main unit

Control output

1 output
NPN open collector 24 V or less; maximum 100 mA or less, residual voltage 1 V or less

External input

Input time 2 ms (ON)/20 ms (OFF) or more (25 ms or more (ON/OFF) when external calibration is selected.)

Response time

50 µs (HIGH SPEED) /250 µs (FINE) /500 µs (TURBO) /1 ms (SUPER) /4 ms (ULTRA) /16 ms (MEGA)

Multiple connections to Expansion units

0 units (expansion not possible)

Output toggle

Light-ON/Dark-ON switchable

Light source LED

Red 4-element LED (wavelength 630 nm)

Timer function

Timer OFF/OFF delay/ON delay/One-shot

Protection circuit

Reverse polarity protection, Over-current protection, Surge absorber

Number of interference prevention units

0 units (expansion not possible)

Case size

H30.3mm 1.19" x W9.8mm 0.39" x L71.8mm 2.38"


Power voltage

12 to 24 VDC ±10 %, Ripple (P-P) 10 % or less

Current Consumption

Normal: 900 mW or less (36 mA max. at 24 V, 48 mA max. at 12 V)*2
Eco on mode: 800 mW or less (32 mA max. at 24 V, 39 mA max. at 12 V)*2
Eco Full mode: 470 mW or less (19 mA max. at 24 V, 23 mA max. at 12 V)

Environmental resistance

Enclosure rating


Ambient light

Incandescent lamp: 20,000 lux or less, Sunlight: 30,000 lux or less

Ambient temperature

-20 to +55 °C -4 to 131 °F (No freezing)

Relative humidity

35 to 85 % RH (No condensation)

Vibration resistance

10 to 55 Hz, Double amplitude 1.5 mm 0.06", 2 hours in each of the X, Y, and Z directions

Shock resistance

500 m/s2, 3 times in each of the X, Y, and Z directions



Glass-reinforced PBT


Approx. 30 g

*1 Use a cable of 30 m 98.43' or less.
*2 Increases 100 mW (4.0 mA) for High Speed mode
*3 About the enclosure rating when a small-diameter fiber unit (the diameter of the cable is ø1.3 or ø1.0) is used. IP66/IP65 cannot be satisfied when the type whose diameter is ø1.3 and terminal can be separated (FU-4F/ 66/91/93/43/63/63T etc.) is used. When any small-diameter fiber units except for the above are used, IP65 is applied.
*4 In any of the following cases, the enclosure rating IP66/IP65 cannot be satisfied.
When the Fiber Unit and KEYENCE's M8 connector cable are not connected (Recommended conditions to tighten up the M8 connector: Tighten it by hand first.Then retighten it as much as 1/16-1/8 of a rotation with pliers.)
When the Fiber Unit and KEYENCE's M8 connector cable are not connected
When the dust cover of the Sensor Amplifier is open
When there is debris in the dust cover
When the waterproof adapter A/B are not used at the time of installation of a small-diameter fiber unit.

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