GL-VM28LN Keyence Safety Light Curtain 28-Beam Type 4 Body Protection

GL-VM28LN Keyence Safety Light Curtain – Type 4 Body Protection, 28 Beams, NPN

The GL-VM28LN is a compact metal Type 4 safety light curtain from the Keyence GL-V series. It uses 28 beam axes with 40 mm spacing. The detection height is 1080 mm. The total length is 1120 mm. This model is built for body protection. It detects objects as small as ø45 mm. The NPN output works with many industrial control inputs. Optical synchronization removes sync wires. The metal housing handles shock and vibration.

Core Specifications

• Brand: Keyence
• Model: GL-VM28LN
• Series: GL-V series
• Module Type: Type 4 ESPE / AOPD safety light curtain
• Protection Type: Body protection
• Beam Axes: 28
• Beam Spacing: 40 mm
• Detection Height: 1080 mm
• Total Length: 1120 mm
• Min. Detectable Object: ø45 mm
• Detecting Distance: 0.3 to 15 m
• Response Time: Max. 5.0 ms (OSSD, channel 0, ON to OFF)

Optical and Detection Data

• Light Source: Infrared LED, 850 nm, Exempt Group (IEC62471)
• Angular Aperture: Up to ±2.5° at 3 m or above
• Synchronization: Optical
• Detection Mode: ON when all beam axes are received
• Interference Prevention: Up to 2 units by series connection and switch setting

Electrical Characteristics

• Supply Voltage: 24 VDC -20/+25%, ripple 10% or less, Class 2
• Max. Load Current: 150 mA or less
• Residual Voltage (ON): Up to 2.5 V (5 m cable)
• OFF Voltage: Up to 2.0 V (5 m cable)
• Leakage Current: Up to 0.8 mA
• Max. Load Capacity: 0.8 µF
• Load Wiring Resistance: Up to 2.5 Ω
• Input Short-Circuit Current: Approx. 3 mA
• OSSD Output: Transistor x2, NPN
• Current Consumption: Transmitter max. 123 mA; Receiver max. 136 mA (OSSD output current not included)
• Protection Circuit: Supply reverse-connection, per-output short-circuit and surge protection
• Ports / Protocols: None

Environmental and Physical Data

• Operating Temperature: -30 to +55 °C, no freezing
• Storage Temperature: -30 to +70 °C, no freezing
• Humidity: Up to 95 % RH, no condensation
• Ambient Light: Incandescent 3,000 lux or less; sunlight 20,000 lux or less
• Protection Rating: IP65 / IP67 (IEC60529)
• Overvoltage Category: II
• Vibration: 5 to 150 Hz, 1G, 10 cycles each in X/Y/Z
• Shock: 15 G, 6 ms pulses, 100 times each in X/Y/Z
• Main Unit: Aluminum alloy
• Upper / Lower Case: PPS (GF40%)
• Front Cover: Polycarbonate, SUS304
• Weight: Transmitter 730 g; Receiver 740 g
• Dimensions (H×W×D): Not available
• Lifecycle: Active; Keyence production status confirmed (Last verified: 2026-09)

Certifications

• IEC61496-1 / -2 Type 4 ESPE / AOPD
• EN ISO13849-1 Category 4, PL e
• IEC61508 SIL3
• UL60947-1 / CSA C22.2 No.60947-1
• UL1998
• EMC: IEC/EN61496-1, EN55011 Class A, FCC Part15B Class A, ICES-003 Class A

Installation Guide

• Mount transmitter and receiver face to face.
• Keep distance between 0.3 m and 15 m.
• Align units within ±2.5° at 3 m or above.
• Use optical synchronization. No sync wire needed.
• Connect 24 VDC Class 2 supply.
• Wire NPN OSSD outputs to the safety circuit.
• Series connect up to 2 units for interference prevention.
• Check IP65/IP67 seal after mounting.

Setup and Maintenance Convenience

• Optical sync reduces wiring work.
• Indicator LEDs show power and output state.
• Reverse-connection protection prevents wiring damage.
• Short-circuit protection limits fault impact.
• Clean front cover for stable detection.
• No moving parts inside. This lowers wear.

Compatibility Notes

• Fits Keyence GL-V series accessories.
• Uses standard 24 VDC industrial power.
• NPN output matches many PLC and safety relay inputs.
• No built-in communication port or protocol.
• External safety relays may be required.
• Series connection supports up to 2 units.

Suitable Equipment

• Conveyor access points
• Palletizing cells
• Packaging line entry zones
• Assembly stations with body access
• Material handling systems
• Robot cell perimeter guarding

Oiltech Controls Review

• 40 mm beam spacing suits body detection.
• 28 beams cover a 1080 mm height.
• NPN output fits many older control systems.
• Metal body handles tough factory conditions.
• IP65/IP67 rating supports washdown areas.
• Good pick for mid-size access guarding.

Oiltech Controls’s Insight

• Check body detection needs before choosing beam spacing.
• Match NPN output to your PLC input type.
• Verify response time against machine stopping distance.
• Use series connection only when needed.
• Keep lens covers clean for stable detection.

FAQ

• Q: What protection type is the GL-VM28LN designed for?
  A: It is a body protection model with 28 beams and 40 mm spacing.
• Q: What is the minimum detectable object size?
  A: It detects objects as small as ø45 mm.
• Q: Does this model use NPN or PNP output?
  A: This model uses NPN output.
• Q: How do I choose between body and hand protection models?
  A: Choose body protection for torso access. Choose hand protection when fingers or hands reach the hazard zone.
• Q: What is the warranty and shipping time?
  A: Warranty is 12 months. Dispatch is in 24 to 28 hours. Shipping is by FedEx, UPS, or DHL.

Why Buy From Oiltech Controls?

• Over 15 years in industrial automation spare parts
• Global shipment support
• Tested surplus and refurbished options
• 12-month warranty
• Technical check before dispatch
• Support for obsolete control systems
• Fast dispatch in 24 to 28 hours
• Shipping by FedEx, UPS, or DHL

Package List and Warranty

• 1 x GL-VM28LN Transmitter
• 1 x GL-VM28LN Receiver
• 1 x Installation manual
• 12-month warranty
• Dispatch in 24 to 28 hours
• Shipping by FedEx, UPS, or DHL
• Tracking number after dispatch

Contact Information

Email: info@oiltechcontrols.com
Phone / WhatsApp: +86 158 8020 0923

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