1. Utangulizi
This manual provides essential instructions for the safe and effective use of the Keyence FS-V31 Fiber Optic Sensor. The FS-V31 is a digital, single-control fiber optic sensor designed for industrial applications, featuring NPN output and selectable Light-ON/Dark-ON operation. It operates on a 12-24 VDC input and has a low power consumption of 0.71 WATT.
Please read this manual thoroughly before installation, operation, or maintenance to ensure proper functionality and to prevent potential hazards.
2. Taarifa za Usalama
Observe the following safety precautions to prevent injury to personnel and damage to the equipment.
- Usalama wa Umeme: Ensure the power supply is disconnected before wiring or performing any maintenance. Incorrect wiring can lead to electric shock or equipment damage.
- Ugavi wa Nguvu: Use only a 12-24 VDC power supply as specified. Exceeding this voltage range can damage the sensor.
- Mazingira: Do not install the sensor in locations subject to excessive vibration, shock, high temperatures, corrosive gases, or direct sunlight.
- Wiring: All wiring should be performed by qualified personnel in accordance with local electrical codes.
- Marekebisho: Do not attempt to disassemble, repair, or modify the sensor. Unauthorized modifications can lead to malfunction and void the warranty.
3. Bidhaa Imeishaview na Vipengele
The Keyence FS-V31 Fiber Optic Sensor consists of the main sensor unit and an integrated cable. Key features include control buttons and indicator lights for easy setup and monitoring.

Kielelezo cha 3.1: Keyence FS-V31 Sensor Unit. This image displays the main sensor body with its integrated cable, clearly showing the product label with model information and serial number.

Kielelezo cha 3.2: Keyence FS-V31 Wiring Details. This image provides a closer view of the sensor's wiring, indicating the color codes for power (BROWN, BLUE) and output (BLACK), along with the CE compliance mark.

Kielelezo cha 3.3: Keyence FS-V31 Control Panel. A detailed view of the sensor's control interface, highlighting the 'SEL' (Select), 'MODE', 'SET', and 'DSC' buttons, which are used for configuration and adjustment.
4. Kuweka na Kuweka
4.1 Kuweka
Mount the FS-V31 sensor securely in a location free from excessive vibration and heat. Ensure adequate space for wiring and access to control buttons. Use appropriate mounting hardware (not included) for your specific application.
Wiring
Refer to Figure 3.2 for wiring color codes. Connect the sensor to a stable 12-24 VDC power supply according to the following:
- BROWN Wire: Connect to +V (Positive DC Power Supply)
- BLUE Wire: Connect to 0V (Negative DC Power Supply / Ground)
- BLACK Wire: NPN Output (Connect to load, then to +V)
Hakikisha miunganisho yote ni salama na imewekewa maboksi ili kuzuia nyaya fupi.
5. Uendeshaji
5.1 Washa umeme
Once wired correctly, apply 12-24 VDC power. The sensor will power on, and indicator lights will illuminate to show its status.
5.2 Light-ON / Dark-ON Selection
The FS-V31 allows selection between Light-ON and Dark-ON modes. In Light-ON mode, the output activates when light is detected. In Dark-ON mode, the output activates when light is interrupted (darkness is detected).
Refer to Figure 3.3 for control button locations. Use the 'MODE' or 'SEL' button to cycle through operating modes. Consult the sensor's display (if present) or indicator lights to confirm the selected mode.
5.3 Marekebisho ya Unyeti
The 'SET' and 'DSC' buttons (refer to Figure 3.3) are typically used for sensitivity adjustment or teaching functions. Follow these general steps:
- Place the target object in the desired detection position.
- Press and hold the 'SET' button (or follow specific sequence) to initiate teaching.
- Remove the target object (if applicable for 2-point teaching).
- Press the 'SET' button again to complete the teaching process.
The sensor will automatically adjust its threshold for optimal detection based on the taught conditions.
6. Matengenezo
The Keyence FS-V31 is designed for minimal maintenance. However, regular inspection and cleaning can prolong its lifespan and ensure reliable operation.
- Kusafisha: Periodically clean the sensor's detection surface and housing with a soft, dry cloth. Avoid using abrasive cleaners or solvents.
- Ukaguzi wa Cable: Check the integrated cable for any signs of damage, such as cuts, abrasions, or kinks. Replace the sensor if the cable is damaged.
- Usalama wa Kuweka: Verify that the sensor remains securely mounted and that all connections are tight.
7. Utatuzi wa shida
Ikiwa kitambuzi hakifanyi kazi kama inavyotarajiwa, rejelea masuala na suluhisho zifuatazo za kawaida:
| Tatizo | Sababu inayowezekana | Suluhisho |
|---|---|---|
| Kihisi hakiwaki. | No power supply, incorrect wiring, or faulty power supply. | Check power connections (BROWN to +V, BLUE to 0V). Verify power supply voltage (12-24 VDC). |
| Output does not switch. | Incorrect Light-ON/Dark-ON mode, improper sensitivity adjustment, or target out of range. | Verify selected operating mode. Re-adjust sensitivity using 'SET' button. Ensure target is within detection range. |
| Erratic detection. | Dust/dirt on sensor lens, external light interference, or unstable mounting. | Clean sensor lens. Shield sensor from strong ambient light. Securely mount the sensor. |
8. Vipimo
| Kigezo | Thamani |
|---|---|
| Mfano | FS-V31 |
| Chapa | Keyence |
| Uingizaji Voltage | 12-24 VDC |
| Matumizi ya Nguvu | 0.71 WATT |
| Aina ya Pato | NPN |
| Hali ya Uendeshaji | Light-ON / Dark-ON Selectable |
| Aina ya Kudhibiti | Single Control, Digital |
| Vipimo vya Bidhaa | Inchi 5 x 5 x 1 |
| Uzito wa Bidhaa | Pauni 2 |
| Mtengenezaji | KEYENCE CORP |
| Tarehe ya Kwanza Inapatikana | Januari 1, 2016 |
9. Udhamini na Msaada
Specific warranty terms for the Keyence FS-V31 Fiber Optic Sensor are provided by the manufacturer or authorized seller at the time of purchase. Please retain your proof of purchase for warranty claims.
For technical support, service, or detailed warranty information, please contact Keyence Corporation directly or your local Keyence distributor. You can find more information on their official webtovuti: www.keyence.com.





