GL-R79F Keyence Type 4 Safety Light Curtain
The GL-R79F is a robust Type 4 safety light curtain from the Keyence GL-R series. It comes as a transmitter and receiver set. Finger protection detection is ø14 mm. The unit has 79 beam axes at 10 mm spacing. Detection height is 780 mm. Total length is 800 mm. Range runs from 0.2 to 10 m. Response time for OSSD is 13.0 ms max. The infrared LED runs at 870 nm. It holds SIL3, PLe Category 4, and IP65/IP67 ratings. This curtain guards hands and fingers on fast machinery.
Technical Data
- Model: GL-R79F
- Brand: Keyence
- Series: GL-R series
- Type: Type 4 ESPE / AOPD, transmitter + receiver set
- Synchronization: Optical or wire (by wiring)
- Light source: Infrared LED, 870 nm
- Effective aperture angle: Max. ±2.5° at 3 m or more
- Detection mode: ON when no interruption in zone
- Interference prevention: Up to 2 GL-R systems
- Protection type: Finger protection
- Detection capability: ø14 mm
- Beam axes: 79
- Beam axis spacing: 10 mm
- Detection height: 780 mm
- Total length: 800 mm
- Detecting distance: 0.2 to 10 m
- Response time (OSSD): Max. 13.0 ms
- Supply voltage: 24 VDC ±20%, Class 2
- Control output (OSSD): 2 transistor outputs, max. 500 mA
- Residual voltage (ON): Max. 2.5 V; OFF-state max. 2.0 V
- Leakage current: Max. 200 µA; capacitive load 2.2 µF
- Supplemental output: AUX / error / muting-lamp, max. 50 mA
- Safety standards: IEC61496-1/-2, IEC61508 SIL3, IEC62061 SIL CL3, EN ISO13849-1 Cat 4 PLe, UL508, UL1998
- EMC: IEC/EN61496-1, EN55011 Class A, FCC Part15B Class A
- Protection circuit: Reverse-current, short-circuit, surge
- Current consumption: Transmitter max. 67 mA; receiver max. 80 mA
- Operating temperature: -10 to +55 °C
- Storage temperature: -25 to +60 °C
- Relative humidity: 15 to 85 % RH (operating)
- Ambient light: 3,000 lux incandescent; 20,000 lux sunlight
- Protection rating: IP65/IP67 (IEC60529)
- Overvoltage category: II
- Material: Aluminum body, nylon case, polycarbonate/SUS304 cover
- Weight: Transmitter 1200 g; receiver 1200 g
- Lifecycle: Active (last verified: 2026-09)
Oiltech Controls’s Insight
- 79 beams catch fingers, not just hands.
- 13 ms response stops motion fast.
- IP65/IP67 handles washdown and dust.
- SIL3 and PLe meet high-risk guarding.
- Optical sync cuts cable runs.
- Two systems can run side by side.
Suitable Equipment
- Presses and stamping machines
- Robotic work cells and weld cells
- Packaging and palletizing lines
- Automated assembly stations
- Metal cutting and bending machines
- Food and pharma packaging equipment
Installation Guide
- Mount transmitter and receiver facing each other.
- Keep distance between 0.2 and 10 m.
- Align beams with the receiver indicator.
- Choose optical or wire sync by wiring.
- Wire 24 VDC and OSSD to the safety relay.
- Set Channel A/B to avoid interference.
Setup and Maintenance
- Check alignment after machine moves.
- Clean front covers with a soft cloth.
- Verify OSSD response with a test rod.
- Check IP seals after washdown.
- Keep within -10 to +55 °C.
- Test muting and AUX outputs at PM.
Compatibility and Certifications
- Works with Keyence GL-R series brackets.
- PNP or NPN set by cable type.
- No built-in communication ports.
- Certified to IEC61496-1/-2 Type 4, SIL3, PLe Cat 4.
- UL508 and UL1998 listed.
Package Contents and Warranty
- One transmitter and one receiver.
- Mounting brackets and hardware.
- Quick start guide.
- 12-month warranty from Oiltech Controls.
- Ships in 24-28 hours via FedEx, UPS, DHL.
Why Buy From Oiltech Controls?
- 15+ years in industrial automation spares.
- Worldwide shipping with FedEx, UPS, DHL.
- Tested surplus and refurbished options.
- 12-month warranty on every order.
- Technical check before dispatch.
- Support for obsolete control systems.
FAQ
Q: What does finger protection mean on the GL-R79F?
A: It detects objects as small as ø14 mm. Beam spacing is 10 mm. This meets finger protection needs. Hand protection curtains use wider spacing and cost less.
Q: How do I pick optical or wire synchronization?
A: Optical sync needs no extra wiring between units. Wire sync is more immune to light interference. Use wire sync when other curtains or strong lights sit nearby.
Q: Can two GL-R79F sets run close together?
A: Yes. The system allows up to 2 GL-R sets. Set Channel A and B for optical sync. Wire sync handles this automatically. Keep the units aligned to avoid cross-talk.
Q: What response time do I need for my press?
A: The GL-R79F gives 13.0 ms max for OSSD. Add your safety relay and machine stop time. Compare the total to your safe distance formula. Always verify with a risk assessment.
Q: Is a refurbished safety curtain safe to buy?
A: Only if fully tested. Ask for OSSD response tests and alignment checks. Oiltech Controls verifies each unit before shipment and backs it with a 12-month warranty.
Contact Information
Inquiries: info@oiltechcontrols.com
Phone/WhatsApp: +86 158 8020 0923
Copyright © 2026 Oiltech Controls Limited. https://www.oiltechcontrols.com/ All rights reserved.
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