GL-R31F Keyence Type 4 Safety Light Curtain 31 Beams

Keyence GL-R31F Type 4 Safety Light Curtain – 31 Beams, Finger Protection

Technical Specifications

• Brand: Keyence
• Model: GL-R31F
• Series: GL-R series
• Category: Type 4 safety light curtain (ESPE / AOPD)
• Protection type: Finger protection with ø14 mm detection capability
• Beam axes: 31 axes with 10 mm spacing
• Detection height: 300 mm; total length: 320 mm
• Detecting distance: 0.2 to 10 m
• Light source: Infrared LED at 870 nm
• Effective aperture angle: Max. ±2.5° at 3 m or more
• Response time: Max. 7.8 ms (OSSD, channel 0, ON→OFF)
• Supply voltage: 24 VDC ±20%, Class 2
• Current consumption: Transmitter max. 54 mA; receiver max. 71 mA
• Control output: 2 transistor OSSD outputs, max. 500 mA load
• Supplemental output: AUX / error / muting-lamp, max. 50 mA
• Operating temperature: -10 to +55 °C with no freezing
• Storage temperature: -25 to +60 °C
• Humidity: 15 to 85 % RH operating; 15 to 95 % RH storage
• Protection rating: IP65 / IP67 (IEC60529)
• Ambient light immunity: 3,000 lux incandescent; 20,000 lux sunlight
• Interference prevention: Up to 2 GL-R systems via Channel A/B switch
• Safety standards: IEC61496-1/-2, IEC61508 (SIL3), EN ISO13849-1 (PLe, Category 4)
• Weight: Transmitter 430 g; receiver 440 g
• Material: Aluminum main unit, nylon case, polycarbonate front cover

Key Performance Highlights

• The GL-R31F pairs a 7.8 ms response time with stable optical synchronization.
• Finger protection at ø14 mm suits presses, robots, and automated assembly cells.
• Wire synchronization or optical synchronization depends on your wiring choice.
• Reverse-current, short-circuit, and surge protection circuits safeguard each output.
• Type 4 ESPE and SIL3 ratings support high-risk machine safety applications.
• The robust aluminum housing resists vibration and mechanical stress on the floor.

Installation Guide

• Mount the transmitter and receiver face to face at the planned detection distance.
• Keep the effective aperture angle within ±2.5° when the span exceeds 3 m.
• Wire the OSSD outputs to your safety relay or safety controller input terminals.
• Select optical or wire synchronization according to your cable and wiring plan.
• Set Channel A or B when two GL-R systems operate near each other.
• Verify alignment with the indicator LEDs before you start machine operation.
• Confirm the detection zone stays clear of reflective surfaces and strong light sources.

Package Contents

• 1 × Keyence GL-R31F transmitter
• 1 × Keyence GL-R31F receiver
• 1 × mounting bracket set
• 1 × installation manual
• Protective packaging for safe transport

Shipping and Support

• We keep this item in stock and ship within 5 days after order confirmation.
• We ship worldwide through FedEx, UPS, and DHL.
• We accept returns within 30 days of delivery.
• Every unit ships brand new and original from Keyence.

FAQ

• Q: What detection capability does the GL-R31F offer?
  A: It detects fingers with a ø14 mm capability across 31 beam axes.
• Q: What is the maximum detecting distance?
  A: The GL-R31F works from 0.2 m up to 10 m.
• Q: How fast does the OSSD respond?
  A: The response time is max. 7.8 ms from ON to OFF.
• Q: Does it support optical and wire synchronization?
  A: Yes, the wiring you choose determines the synchronization mode.
• Q: What protection rating does the housing carry?
  A: The unit carries IP65 and IP67 ratings under IEC60529.
• Q: What operating temperature range does it support?
  A: It operates from -10 to +55 °C without freezing.
• Q: Is this product new and in stock?
  A: Yes, we offer brand new original units with stock on hand.
• Q: How long does delivery take?
  A: We dispatch within 5 days via FedEx, UPS, or DHL.