GL-R52H Keyence GL-R Series Safety Light Curtain
Model: GL-R52H is a robust Type 4 safety light curtain from Keyence. It belongs to the GL-R series. This is a hand protection type with 52 beam axes. The set includes a transmitter and a receiver. It uses optical or wire synchronization, set by wiring. The light source is an infrared LED at 870 nm. Detection capability is ø25 mm. Total length is 1040 mm.
Protection Profile at a Glance
- Safety type: Type 4 ESPE / AOPD
- Protection type: Hand protection
- Detection capability: ø25 mm
- Beam axes: 52
- Beam axis spacing: 20 mm
- Detection height: 1020 mm
- Total length: 1040 mm
- Detecting distance: 0.2 to 15 m
- Response time: Max. 10.0 ms, OSSD, channel 0, ON to OFF
- Effective aperture angle: Max. ±2.5° at 3 m or more
- Interference prevention: Up to 2 GL-R systems, Channel A/B for optical, automatic for wire
Output and Load Ratings
- Supply voltage: 24 VDC ±20%, ripple 10% or less, Class 2
- OSSD outputs: 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
- Capacitive load: Max. 2.2 µF
- Load wiring resistance: Max. 2.5 Ω
- Supplemental output: AUX / error / muting-lamp, max. 50 mA
- Current consumption: Transmitter max. 69 mA, receiver max. 80 mA
- Protection circuit: Reverse-current, short-circuit, surge protection
Safety Standards and EMC
- Safety: IEC61496-1/-2 Type 4, 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 Physical
- Operating temperature: -10 to +55 °C, no freezing
- Storage temperature: -25 to +60 °C, no freezing
- Humidity operating: 15 to 85 % RH, no condensation
- Humidity storage: 15 to 95 % RH
- Ambient light: Incandescent 3,000 lux or less, sunlight 20,000 lux or less
- Protection rating: IP65/IP67 per IEC60529
- Overvoltage category: II
- Material: Aluminum main unit, nylon GF30% case, polycarbonate and SUS304 front cover
- Weight: Transmitter 1440 g, receiver 1450 g
- Lifecycle: Active, official Keyence status confirmed. Last verified: 2026-09
Oiltech Controls Review
The GL-R52H fits engineers who need Type 4 hand protection over a wide opening. The 52 beam axes and 20 mm spacing cover 1020 mm of detection height. The ø25 mm detection capability handles hand and arm access. The 0.2 to 15 m range suits large cells and long conveyors. The 10.0 ms response keeps safety distance short. The IP65/IP67 rating handles dust and washdown. The SIL3 and PLe ratings simplify risk assessment. The aluminum body and 1440 g weight give a stable mount on long frames.
Oiltech Controls’s Insight
Buyers often replace a damaged GL-R52H while keeping the same brackets. Confirm your cable type before ordering. The OSSD type is PNP or NPN by cable, not by switch. Check the synchronization method in your panel. Optical sync needs the Channel A/B switch set correctly. Wire sync is automatic. Use the AUX output for status lamps, not for safety. Keep the front cover clean to avoid false trips. Watch the ±2.5° aperture angle when the distance exceeds 3 m. The 15 m range gives more layout freedom than the finger type.
Compatible Equipment
- Safety relays and safety PLCs with OSSD inputs
- Machine guards on press, packing, and assembly cells
- GL-R series mounting brackets and cables
- Muting lamps and status indicators
- Robotic work cells and automated stations
- Long conveyor and palletizing lines
- Legacy safety circuits that need Type 4 protection
Why Buy From Oiltech Controls?
- Over 15 years in industrial automation spare parts
- Shipment support to customers worldwide
- Tested industrial surplus and refurbished choices
- 12-month warranty on eligible items
- Technical checks before every shipment
- Help for discontinued and obsolete control systems
Shipping and Warranty
- 12-month warranty included
- Orders ship in 24 to 28 hours
- Carriers: FedEx, UPS, DHL
- Technical verification before dispatch
- Tracking details sent after shipment
FAQ
Q: Is the GL-R52H a complete set?
A: Yes. It comes as a transmitter and receiver set. Both units are included. Check the cable type and length before you order, since OSSD polarity depends on the cable.
Q: How do I choose between optical and wire synchronization?
A: Pick optical sync when wiring between both units is hard. Set the Channel A/B switch to avoid crosstalk. Pick wire sync when a direct cable is easy. Wire sync is automatic and needs no switch setting.
Q: What safety rating does the GL-R52H carry?
A: It meets Type 4 ESPE/AOPD, SIL3, SIL CL3, and Category 4 PLe. These ratings fit high-risk machine guarding. Confirm your risk assessment matches these levels.
Q: Can I use the GL-R52H outdoors?
A: The IP65/IP67 rating handles dust and water spray. The ambient light limit is 20,000 lux for sunlight. For direct outdoor use, add a shade or enclosure to stay within limits.
Q: How do I pick between GL-R52H and GL-R55F?
A: Pick the GL-R52H for hand protection over a wide opening. It gives 1020 mm detection height and 15 m range. Pick the GL-R55F for finger protection in a shorter opening. Match detection capability and height to your risk assessment.
Contact our team for inquiries: info@oiltechcontrols.com or +86 158 8020 0923.
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