GL-VM31FN Keyence Safety Light Curtain Type 4 Finger Protection

Keyence GL-VM31FN Type 4 Safety Light Curtain — 31-Beam Finger Protection

Core Technical Specifications

• Brand: Keyence — Model: GL-VM31FN — Series: GL-V series
• Detection mode: Type 4 ESPE/AOPD with optical synchronization and ON state when all beams receive light
• Detection capability: ø14 mm minimum object size with 10 mm beam spacing and 300 mm detection height
• Measuring range: 0.3 to 12 m detecting distance with up to ±2.5° effective angular aperture
• Response time: 5.1 ms maximum OSSD channel 0 ON→OFF transition for rapid stop signals
• Light source: Infrared LED at 850 nm wavelength, Exempt Group per IEC62471
• Output type: Two NPN transistor OSSD outputs with short-circuit and surge protection
• Supply voltage: 24 VDC -20/+25% with 10% or less ripple, Class 2 rated
• Current consumption: Transmitter max. 73 mA; receiver max. 83 mA with indicator ON
• Temperature range: -30 to +55 °C operating; -30 to +70 °C storage without freezing

Environmental Durability and Interference Resistance

• Protection rating: IP65/IP67 per IEC60529 seals against dust and water ingress
• Humidity tolerance: Up to 95% RH without condensation for humid plant environments
• Ambient light immunity: Incandescent lamp 3,000 lux or less; sunlight 20,000 lux or less
• Interference prevention: Up to 2 units via series connection and switch setting
• Vibration resistance: 5 to 150 Hz at 1G, 10 cycles each in X/Y/Z axes
• Shock resistance: 15 G, 6 ms pulses, 100 times each in X/Y/Z directions

Safety Standards and Compliance

• Safety ratings: IEC61496-1/-2 Type 4 ESPE/AOPD, EN ISO13849-1 Category 4 PL e, IEC61508 SIL3
• Additional standards: UL60947-1, CSA C22.2 No.60947-1, and UL1998 compliance
• EMC: IEC/EN61496-1, EN55011 Class A, FCC Part15B Class A, ICES-003 Class A
• Overvoltage category: II rated for stable industrial power environments

Physical Build and Construction

• Material: Aluminum alloy main unit with PPS (GF40%) upper and lower case
• Front cover: Polycarbonate with SUS304 for robust mechanical protection
• Total length: 320 mm compact profile for tight machine openings
• Weight: Transmitter 220 g; receiver 220 g for lightweight mounting
• Communication: No built-in ports, protocols, or expansion options

Installation Guide

• Mount the transmitter and receiver facing each other across the guarded opening within 0.3 to 12 m
• Align both units carefully because optical synchronization requires a clear line of sight between them
• Connect the 24 VDC Class 2 supply and wire the two NPN OSSD outputs to your safety relay
• Set the series connection switch when you install two units to prevent optical interference
• Verify the ON state by confirming all 31 beam axes receive light before machine startup
• Route load wiring with resistance up to 2.5 Ω and load capacity up to 0.8 µF

Package Contents

• Keyence GL-VM31FN transmitter unit (1 piece)
• Keyence GL-VM31FN receiver unit (1 piece)
• Mounting brackets and hardware set
• Instruction manual
• Protective packaging for safe transport

Shipping and Support

• We keep this item in stock and dispatch within 5 days after order confirmation
• We ship via common express carriers such as DHL, UPS, and FedEx
• We offer a 30-day return window for your peace of mind
• All units are brand new and original from Keyence

FAQ

• Q: What is the minimum detectable object size of the GL-VM31FN?
  A: The GL-VM31FN detects objects as small as ø14 mm, which suits finger protection applications.
• Q: What detecting distance does this light curtain support?
  A: It supports a detecting distance from 0.3 to 12 m with reliable optical synchronization.
• Q: How fast does the OSSD output respond?
  A: The response time reaches 5.1 ms maximum for OSSD channel 0 ON→OFF transitions.
• Q: Does this model use NPN or PNP outputs?
  A: The GL-VM31FN provides two NPN transistor OSSD outputs for safety relay connection.
• Q: What is the operating temperature range?
  A: The unit operates from -30 to +55 °C and stores from -30 to +70 °C without freezing.
• Q: Does the GL-VM31FN resist water and dust?
  A: Yes, it carries IP65/IP67 protection rating per IEC60529 for harsh environments.
• Q: Can I install two units close together?
  A: Yes, series connection and switch setting prevent interference for up to 2 units.
• Q: Is the product new and original?
  A: Yes, we supply brand new original units with stock available for fast dispatch.
• Q: How long does delivery take and which carriers do you use?
  A: We ship within 5 days via DHL, UPS, or FedEx for reliable delivery.
• Q: What is your return policy?
  A: We support 30-day returns so you can order with confidence.