Product Description

The Keyence FS-V31C is a high-speed digital fiber optic amplifier designed for precise detection in industrial automation applications. Featuring a compact M8 connector, it supports a 1-output + 1-input configuration with NPN output. The amplifier utilizes a red 4-element LED light source with a wavelength of 640 nm, offering selectable detection modes such as light intensity and area detection. It provides a response time of 33 µs in HIGH SPEED mode and includes a dual 7-segment display for real-time monitoring of current and preset values. With a power supply range of 12–24 VDC and a robust polycarbonate housing, the FS-V31C is built to withstand industrial environments.​

Technical Specifications

• Model: FS-V31C
• Type: Fiber Optic Amplifier
• Connector: M8
• Output Type: NPN
• Control Output: 1 output
• External Input: 1 input
• Light Source: Red 4-element LED (Wavelength: 640 nm)
• Response Time: 33 µs (HIGH SPEED), 250 µs (FINE), 500 µs (TURBO), 1 ms (SUPER TURBO), 4 ms (ULTRA TURBO), 16 ms (MEGA TURBO)
• Detection Mode: Light intensity, area detection (automatic sensitivity-tracking function)
• Display: Dual 7-segment display (Current Value: 0–64,512, Preset Value: 4-digit green LED)
• Timer Function: OFF-delay, ON-delay, One-shot, combinations (0.1 ms to 9,999 ms)
• Control Output Specifications: NPN open-collector 24 V, 100 mA max. (main unit only), Residual voltage: 1 V max.
• External Input Specifications: Input time: 2 ms (ON), 20 ms (OFF) min.
• Unit Expansion: Up to 16 expansion units can be connected (a total of 17 units). Note that the 2-output type should be counted as two units.
• Power Supply Voltage: 12–24 VDC ±10%, Ripple (P-P): 10% max.
• Power Consumption: Normal: 710 mW max. (Using 24 V, 29 mA max.), Power saving: 540 mW max. (Using 24 V, 22 mA max.)
• Ambient Light Resistance: 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
• Housing Material: Polycarbonate
• Weight: Approximately 80 g​