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Digital Fibre Optic SensorsFS-V20 series

Fibre Amplifier, Cable Type, Main Unit, NPN


[Discontinued model]

This model has been discontinued.

Compliance with the certification standard is ensured as of the time of shipment from our company.

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Main unit: Monitor output, NPN

Light source

Red, 4-element LED

Response time

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

Output selection

LIGHT-ON/DARK-ON (switch-selectable)

Detection mode

Light intensity/rising edge/falling edge

Shift function

Max. ±1,999 (variable)

Timer function


Timer OFF/OFF-delay timer/ON-delay timer/One-shot timer, selectable

Variable range

1 to 30 ms (in 1 ms increments), 30 to 50 ms (in 2 ms increments), 50 to 200 ms (in 10 ms increments), 200 to 500 ms (in 50 ms increments)


±10 % of the Preset Value

Control output

NPN open-collector 100 mA max. (40 VDC max.)*1, Residual voltage: 1 V max.

Monitor output

1 to 5 load resistance to display 0 - 495 for FINE and TURBO. Voltage output: 1 to 5 V, Load resistance: 10 kΩ min., Repeatability: ±0.5 % of F.S.

Unit expansion

Up to 16 expansion units can be connected (a total of 17 units).*2

Mutual interference suppression



Power voltage

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

Power consumption


S-APC OFF: 650 mW max.(27 mA max. at 24 VDC), S-APC ON: 720 mW max.(30 mA max. at 24 VDC)

ECO half

S-APC OFF: 530 mW max.(22 mA max. at 24 VDC), S-APC ON: 660 mW max.(25 mA max. at 24 VDC)

ECO all

S-APC OFF: 480 mW max.(20 mA max. at 24 VDC), S-APC ON: 550 mW max.(23 mA max. at 24 VDC)

Environmental resistance

Ambient light

Incandescent lamp: 20,000 lux max., Sunlight: 30,000 lux max.

Ambient temperature

-10 to +55 °C (No freezing)

Relative humidity

35 to 85 % RH (No condensation)

Vibration resistance

10 to 55 Hz, Double amplitude 1.5 mm, 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

Case material



30 mm (H) x 9 mm (W) x 70 mm (D)


Approx. 80 g (including 2-m cable)

*1 20 mA at maximum for the expansion unit.
*2 If more than one unit is used together, the ambient temperature varies with the conditions below. Mount the units on the DIN rail with mounting brackets and check that the output current is 20 mA or less.
1 or 2 Units: -10 to +55 °C (14 to 131 °F), 3 to 10 Units: -10 to +50 °C (14 to 122 °F), 11 to 16 Units: -10 to +45 °C (14 to 113 °F)

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