GL-R191F Type 4 Safety Light Curtain by Keyence
The GL-R191F is a Type 4 safety light curtain from the GL-R series. It ships as a transmitter and receiver set. The design targets finger protection. It carries 191 beam axes with 10 mm spacing. Detection capability is ø14 mm. Detection height reaches 1900 mm. Total length is 1920 mm. The light source is an infrared LED at 870 nm. Response time on OSSD is 25.0 ms max. This unit fits machine guarding where hands and fingers must stay safe.
GL-R Series Engineering Context
- Series: GL-R series robust Type 4 curtains.
- Set contents: transmitter plus receiver.
- ESPE/AOPD class: Type 4.
- Protection type: finger protection.
- Synchronization: optical or wire, set by wiring.
- Detection mode: output turns ON when the zone is clear.
Optical and Detection Data
- Light source: infrared LED, 870 nm.
- Effective aperture angle: max ±2.5° at 3 m or more.
- Detection capability: ø14 mm.
- Beam axes: 191.
- Beam axis spacing: 10 mm.
- Detection height: 1900 mm.
- Total length: 1920 mm.
- Detecting distance: 0.2 to 10 m.
Response and Interference Control
- Response time, OSSD, channel 0, ON to OFF: 25.0 ms max.
- Interference prevention: up to 2 GL-R systems.
- Optical mode: Channel A/B switch.
- Wire mode: automatic channel handling.
- Plan mounting distance to avoid cross-talk.
Electrical and Safety Outputs
- Supply voltage: 24 VDC ±20%, Class 2.
- Ripple: P-P 10% or less.
- OSSD: 2 transistor outputs, PNP or NPN by cable type.
- OSSD load: max 500 mA.
- 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.
- Max capacitive load: 2.2 µF.
- Load wiring resistance: max 2.5 Ω.
- Supplemental output: AUX, error, muting-lamp, max 50 mA.
- Protection: reverse-current, per-output short-circuit, surge.
- Current draw: transmitter max 92 mA, receiver max 108 mA.
Safety Standards and EMC
- IEC61496-1/-2: Type 4 ESPE/AOPD.
- IEC61508: SIL3.
- IEC62061: SIL CL3.
- EN ISO13849-1: Category 4, PLe.
- UL508 and UL1998.
- EMC: IEC/EN61496-1, EN55011 Class A.
- EMC: FCC Part15B Class A, ICES-003 Class A.
Environment and Physical Build
- Operating temperature: -10 to +55 °C, no freezing.
- Storage temperature: -25 to +60 °C.
- Humidity: 15 to 85% RH operating, no condensation.
- Storage humidity: 15 to 95% RH.
- Ambient light: 3,000 lux incandescent, 20,000 lux sunlight.
- Protection rating: IP65/IP67.
- Overvoltage category: II.
- Main body: aluminum.
- Upper and lower case: nylon, GF 30%.
- Front cover: polycarbonate and SUS304.
- Weight: transmitter 2700 g, receiver 2800 g.
Suitable Equipment and Lines
- Press and stamping guards.
- Robot cell entry protection.
- Assembly and pick-and-place stations.
- Packaging and palletizing openings.
- Food and pharma lines needing washdown.
- Legacy GL-R retrofit projects.
Oiltech Controls Review
- Resolution: ø14 mm gives true finger protection.
- Length: 1920 mm covers tall openings in one set.
- Response: 25.0 ms max suits most machine stop distances.
- Rating: IP65/IP67 resists dust and water spray.
- Limit: no built-in network port.
- Verdict: dependable Type 4 curtain for demanding guards.
Oiltech Controls’s Insight
- Confirm cable type: PNP or NPN output.
- Check safety distance against the 25.0 ms response.
- Decide optical or wire sync before wiring.
- Allow space for two GL-R systems max.
- Keep spare sets for high-risk cells.
Why Buy From Oiltech Controls?
- 15+ years in industrial automation spare parts.
- Worldwide shipment support.
- Tested industrial surplus and refurbished options.
- 12-month warranty on every order.
- Technical verification before dispatch.
- Help for obsolete control systems.
Shipping and Warranty Terms
- Dispatch window: 24 to 28 hours.
- Couriers: FedEx, UPS, DHL.
- Tracking number sent after pickup.
- Warranty: 12 months from delivery.
- Coverage: defects in materials and workmanship.
- Exclusions: misuse, impact damage, unauthorized repair.
- Claims need order number and fault details.
Contact Information
- Email: info@oiltechcontrols.com
- WhatsApp: +86 158 8020 0923
FAQ
Q: How do I choose between optical and wire synchronization?
A: Optical sync needs no extra wiring and suits most single-cell installs. Wire sync is more stable in bright or reflective areas. It also allows automatic channel handling between two GL-R systems.
Q: Is the 25.0 ms response time fast enough for my press?
A: It depends on your safety distance formula. Add machine stop time, curtain response, and approach speed. If the result fits your guard opening, the curtain works. Otherwise, reduce distance or use a faster model.
Q: Can I run two GL-R191F sets near each other?
A: Yes, up to two GL-R systems. Use Channel A/B in optical mode. For wire mode, the system handles channels automatically. Keep beams aligned to avoid cross-talk.
Q: Does IP67 mean I can wash it down daily?
A: It handles water spray and dust well. For daily high-pressure washdown, add extra shielding and check cable entry seals. Inspect the front cover for scratches over time.
Q: Is the GL-R191F still in production?
A: Keyence lists it as active. Last verified in 2026-09. For older GL-R banks, we also offer tested surplus sets.
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