GL-R191F Keyence GL-R Series Safety Light Curtain

GL-R191F Keyence Safety Light Curtain: Type 4 Finger Protection for Demanding Machines

Technical Specifications

• Brand: Keyence
• Model: GL-R191F
• Series: GL-R series
• Category: Type 4 safety light curtain (ESPE / AOPD), transmitter and receiver set
• Protection type: Finger protection with ø14 mm detection capability
• Beam axes: 191 axes with 10 mm beam axis spacing
• Detection height: 1900 mm; total length 1920 mm
• Detecting distance: 0.2 to 10 m
• Light source: Infrared LED at 870 nm
• Effective aperture angle: Max. ±2.5° at an operating distance of 3 m or more
• Response time: Max. 25.0 ms (OSSD, channel 0, ON to OFF)
• Synchronization: Optical or wire synchronization, set by wiring
• Interference prevention: Up to 2 GL-R systems (Channel A/B switch for optical, automatic for wire)
• Supply voltage: 24 VDC ±20%, ripple (P-P) 10% or less, Class 2
• Control output (OSSD): 2 transistor outputs, PNP or NPN by cable type, max. load 500 mA
• Residual voltage (ON): Max. 2.5 V with 5 m cable; OFF-state voltage max. 2.0 V
• Leakage current: Max. 200 µA; max. capacitive load 2.2 µF; load wiring resistance max. 2.5 Ω
• Supplemental output: AUX / error / muting-lamp transistor output, max. 50 mA
• Current consumption: Transmitter max. 92 mA; receiver max. 108 mA (OSSD output current excluded)
• Protection circuit: Reverse-current, per-output short-circuit, and surge protection
• Built-in ports: None; no protocols or communication expansion

Safety Standards and Compliance

• Safety standards: IEC61496-1/-2 (Type 4 ESPE/AOPD), IEC61508 (SIL3), IEC62061 (SIL CL3)
• Machine safety: EN ISO13849-1 Category 4, PLe
• North American approvals: UL508 and UL1998
• EMC: IEC/EN61496-1, EN55011 Class A, FCC Part15B Class A, ICES-003 Class A
• Overvoltage category: II

Environmental Resistance

• Operating temperature: -10 to +55 °C with no freezing
• Storage temperature: -25 to +60 °C with no freezing
• Operating humidity: 15 to 85 % RH with no condensation
• Storage humidity: 15 to 95 % RH
• Ambient light immunity: Incandescent lamp 3,000 lux or less; sunlight 20,000 lux or less
• Protection rating: IP65/IP67 per IEC60529

Physical Construction

• Main unit material: Aluminum
• Upper and lower case: Nylon with 30% glass fiber
• Front cover: Polycarbonate and SUS304
• Weight: Transmitter 2700 g; receiver 2800 g
• Dimensions (H×W×D): Not available from the manufacturer data sheet

Installation Guide

• Mount the transmitter and receiver facing each other so the 191 beam axes align across the guarded opening.
• Keep the detecting distance between 0.2 m and 10 m to stay inside the rated range.
• Respect the ±2.5° effective aperture angle when the operating distance reaches 3 m or more.
• Choose optical synchronization for simple setups, or wire synchronization for tighter channel control.
• Set the Channel A/B switch when you install two GL-R systems side by side with optical synchronization.
• Feed clean 24 VDC power with ripple at 10% or less and Class 2 isolation.
• Wire the two OSSD outputs to the machine safety circuit and confirm the 25.0 ms response time fits your stop distance.
• Verify the detection mode: the output turns ON when the detection zone stays free of interruption.
• Use the AUX, error, or muting-lamp output for status signaling at a load of 50 mA or less.
• Confirm IP65/IP67 sealing after mounting so dust and water jets cannot enter the housing.

Package Contents

• 1 × Keyence GL-R191F transmitter
• 1 × Keyence GL-R191F receiver
• Mounting brackets and fixing hardware
• Instruction sheet

Shipping and Support

• We ship with FedEx, UPS, and DHL to most global destinations.
• We hold stock for this item and dispatch orders within 5 days.
• We supply brand-new original units only.
• We accept returns within 30 days of delivery.

FAQ

• Q: What detection capability does the GL-R191F offer?
  A: It provides ø14 mm finger protection, so it suits guarding zones where hands and fingers can reach.
• Q: How many beam axes does this model have?
  A: It has 191 beam axes with 10 mm spacing, giving a 1900 mm detection height.
• Q: What is the maximum detecting distance?
  A: The rated range runs from 0.2 m to 10 m.
• Q: How fast does the OSSD output respond?
  A: The response time reaches a maximum of 25.0 ms on channel 0 during an ON to OFF transition.
• Q: Does the GL-R191F meet SIL3 and PLe requirements?
  A: Yes, it meets IEC61508 SIL3, IEC62061 SIL CL3, and EN ISO13849-1 Category 4 PLe.
• Q: Can I use it outdoors or in wet areas?
  A: It carries IP65/IP67 protection and tolerates sunlight up to 20,000 lux.
• Q: What operating temperature range does it support?
  A: It runs from -10 to +55 °C without freezing.
• Q: How do I prevent interference between two systems?
  A: Use the Channel A/B switch for optical synchronization, or rely on automatic handling with wire synchronization.
• Q: Is the unit in stock and how fast do you ship?
  A: We keep stock on hand and ship within 5 days using FedEx, UPS, or DHL.
• Q: What is your return policy?
  A: We offer brand-new original products and accept returns within 30 days.