GL-R71F Keyence GL-R Series Finger Protection Light Curtain

GL-R71F Keyence Type 4 Safety Light Curtain

The GL-R71F is a robust Type 4 safety light curtain from the GL-R series. It ships as a transmitter and receiver set. With 71 beam axes and 10 mm spacing, it guards fingers with ø14 mm detection. Total length is 720 mm and detection height is 700 mm. Optical or wire synchronization depends on your wiring choice.

Optical and Detection Data

• Model: GL-R71F
• Brand: Keyence
• Series: GL-R series
• Type: Type 4 ESPE / AOPD safety light curtain
• Set includes: Transmitter plus receiver
• Synchronization: Optical or wire, set by wiring
• Light source: Infrared LED, 870 nm
• Aperture angle: Max. ±2.5° at 3 m or more
• Detection mode: Turns ON when no interruption is present
• Interference prevention: Up to 2 GL-R systems, Channel A/B for optical, automatic for wire
• Protection type: Finger protection
• Detection capability: ø14 mm
• Beam axes: 71
• Beam spacing: 10 mm
• Detection height: 700 mm
• Total length: 720 mm
• Detecting distance: 0.2 to 10 m
• Response time: Max. 12.1 ms, OSSD channel 0, ON to OFF

Electrical and Safety Data

• Supply voltage: 24 VDC ±20%, ripple P-P 10% or less, Class 2
• OSSD: 2 transistor outputs, PNP or NPN by cable type
• OSSD load: 500 mA maximum
• Residual voltage ON: Max. 2.5 V at 5 m cable
• OFF-state voltage: Max. 2.0 V at 5 m cable
• Leakage current: Max. 200 µA
• Capacitive load: Max. 2.2 µF
• Load wiring resistance: Max. 2.5 Ω
• Auxiliary output: AUX, error, muting-lamp transistor output
• Auxiliary load: 50 mA maximum
• Current consumption: Transmitter max. 66 mA, receiver max. 78 mA, OSSD current excluded
• Protection circuit: Reverse-current, per-output short-circuit, surge protection

Standards and Certifications

• Safety: IEC61496-1/-2 Type 4 ESPE/AOPD
• Functional safety: IEC61508 SIL3, IEC62061 SIL CL3
• Machine safety: EN ISO13849-1 Category 4, PLe
• North America: UL508, UL1998
• EMC: IEC/EN61496-1, EN55011 Class A, FCC Part15B Class A, ICES-003 Class A

Environment and Build

• Operating temperature: -10 to +55 °C, no freezing
• Storage temperature: -25 to +60 °C, no freezing
• Humidity: 15 to 85 % RH operating, 15 to 95 % RH storage, no condensation
• Ambient light: Incandescent 3,000 lux or less, sunlight 20,000 lux or less
• Protection rating: IP65 / IP67, IEC60529
• Overvoltage category: II
• Material: Aluminum main unit, nylon GF 30% cases, polycarbonate front cover, SUS304
• Weight: Transmitter 1000 g, receiver 1010 g
• Lifecycle: Active, Keyence production confirmed. Last verified: 2026-09

Where It Fits Best

• Finger guard on press and stamping machines
• Robot cell entry protection
• Packaging and palletizing access points
• Assembly stations with small part risk
• Automated door and gate safety
• Retrofit of Type 4 guards on legacy lines

Installation Notes

• Mount transmitter and receiver face to face.
• Keep distance between 0.2 and 10 m.
• Pick optical or wire sync before wiring.
• Use Channel A/B to avoid cross talk.
• Confirm PNP or NPN cable type for OSSD.
• Check response time against machine stop time.

Ordering, Warranty, and Delivery

• 12-month warranty on every set
• Dispatch in 24 to 28 hours after order confirmation
• Shipping by FedEx, UPS, and DHL
• Tracking number sent after dispatch
• Stock checked before payment

Why Buy From Oiltech Controls?

• Over 15 years in industrial automation spare parts
• Worldwide shipping with FedEx, UPS, and DHL
• Tested surplus and refurbished options
• 12-month warranty for peace of mind
• Technical check before every shipment
• Support for obsolete control systems

Oiltech Controls Review

Oiltech Controls supplies hard-to-find automation parts. The team checks each set before shipment. Engineers get clear answers on sync wiring, OSSD cable type, and safety distance. The GL-R71F is a solid pick for finger-level Type 4 guarding. For inquiries, email info@oiltechcontrols.com or call +86 158 8020 0923.

Oiltech Controls’s Insight

• Match response time to machine stop time first.
• Choose wire sync for noisy optical rooms.
• Keep lens covers clean for full 10 m range.
• Use muting lamps for clear operator feedback.
• Log Channel A/B settings for fast service.

FAQ

1. How do I choose optical or wire synchronization?
   Pick wire sync when optical paths cross or reflect. Pick optical sync when wiring runs are long or tight. Wire sync also avoids Channel A/B setup. Both methods meet Type 4 limits.
2. What cable type do I need for PNP OSSD?
   OSSD polarity is set by cable type, not by a switch. Order the PNP cable for sourcing inputs. Order the NPN cable for sinking inputs. Confirm your safety relay input type before buying.
3. Why does the curtain trip without an operator?
   Check for dust on the lens covers first. Then check alignment across the full 720 mm length. Strong sunlight or reflective metal can also cause trips. Slow vibration from nearby machines can shift the brackets.
4. How close can I mount two GL-R systems?
   You can run up to 2 GL-R systems side by side. Set Channel A on one and Channel B on the other for optical sync. Wire sync handles this automatically. Keep both systems on separate channels to avoid cross talk.
5. Should I buy new, surplus, or refurbished?
   Choose new for safety-critical lines. Choose tested surplus when budget is tight and lead time matters. Choose refurbished when the original model is obsolete. Oiltech Controls verifies each option before shipment. All options carry a 12-month warranty.

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