GL-VM24LN Keyence Safety Light Curtain 960 mm NPN OSSD Body Guard

GL-VM24LN Keyence Body Protection Light Curtain

The GL-VM24LN is a Type 4 safety light curtain from Keyence in the GL-V series. It uses 24 infrared beam axes for body protection. The metal housing is small and robust. It gives NPN output and measures 960 mm total length. This transmitter and receiver set guards medium openings. The GL-VM24LN fits robot cells, packaging lines, and conveyor gates. It responds fast and syncs optically without extra wiring.

Core Specifications

• Brand: Keyence
• Model: GL-VM24LN
• Series: GL-V series
• Type: Type 4 ESPE / AOPD
• Protection: Body protection
• Beam axes: 24
• Beam spacing: 40 mm
• Detection height: 920 mm
• Total length: 960 mm
• Min. object size: ø45 mm
• Detecting distance: 0.3 to 15 m
• Response time: max. 4.8 ms (OSSD, ON→OFF)
• Output: NPN transistor x2 (OSSD)

Electrical Profile

• Supply voltage: 24 VDC -20/+25%, ripple 10% or less, Class 2
• Current consumption: Transmitter max. 111 mA; Receiver max. 125 mA
• Max. load current: 150 mA or less
• Residual voltage: ON 2.5 V max; OFF 2.0 V max (5 m cable)
• Leakage current: 0.8 mA max
• Load capacity: 0.8 µF max
• Load wiring resistance: 2.5 Ω max
• Input short-circuit current: approx. 3 mA
• Protection circuit: Reverse-connection, short-circuit, surge

Optical and Environmental Data

• Light source: Infrared LED 850 nm, Exempt Group
• Synchronization: Optical
• Angular aperture: up to ±2.5° at 3 m or above
• Interference prevention: up to 2 units by series connection
• Operating temperature: -30 to +55 °C (no freezing)
• Storage temperature: -30 to +70 °C (no freezing)
• Relative humidity: up to 95 % RH (no condensation)
• Ambient light: Incandescent 3,000 lux; Sunlight 20,000 lux
• Protection rating: IP65 / IP67 (IEC60529)
• Overvoltage category: II
• Vibration resistance: 5 to 150 Hz, 1G, 10 cycles X/Y/Z
• Shock resistance: 15 G, 6 ms, 100 times X/Y/Z
• Material: Aluminum alloy, PPS, Polycarbonate, SUS304
• Weight: Transmitter 630 g; Receiver 640 g
• Built-in ports: None
• Protocols: None
• Communication expansion: None

Oiltech Controls’s Insight

• The 40 mm beam spacing suits body detection, not finger detection.
• ø45 mm minimum object size matches torso and limb guarding.
• 960 mm total length covers medium machine openings.
• NPN output pairs with many relay and PLC input cards.
• Optical sync removes extra cabling between units.
• Metal case holds up under vibration and shock.

Oiltech Controls Review

• Good pick when you guard a whole body, not just hands.
• Fast 4.8 ms response keeps safety distance short.
• IP67 rating resists dust, coolant, and washdown.
• Series connection links up to 2 units.
• No comms port keeps wiring simple.
• Solid spare part for aging GL-V systems.

Which Equipment Fits GL-VM24LN

• Robot cells and welding cells
• Packaging and palletizing lines
• Conveyor gates and transfer points
• Assembly stations with medium openings
• Material handling equipment

Installation Guide

• Mount transmitter and receiver facing each other.
• Keep alignment within ±2.5° for stable sync.
• Match 40 mm beam spacing to body protection needs.
• Use 24 VDC Class 2 supply only.
• Wire NPN outputs to the safety circuit.
• Check IP65/IP67 seals after mounting.
• Confirm response time stays under 4.8 ms.
• Test all 24 beam axes before operation.

Setup and Maintenance

• Setup needs no special tools.
• Indicator LEDs help with alignment.
• Clean the front cover with a soft cloth.
• Check for dust or oil buildup.
• Inspect seals and brackets regularly.
• For help, email info@oiltechcontrols.com or message +86 158 8020 0923.

Compatibility Notes

• Works with standard safety relays and controllers.
• Supports NPN input devices.
• No built-in communication port.
• Up to 2 units link by series connection.
• Fits most industrial machines without adapters.
• Always match supply to 24 VDC.

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
• IEC/EN61496-1, EN55011 Class A
• FCC Part15B Class A, ICES-003 Class A

Package List

• Transmitter unit x1
• Receiver unit x1
• Mounting brackets and screws
• Instruction manual
• 12-month warranty card

Warranty and Shipping

• All units carry a 12-month warranty.
• Orders ship in 24-28 hours.
• We ship by FedEx, UPS, or DHL.
• Tracking is provided for every order.
• Contact us for urgent or bulk needs.

Why Buy From Oiltech Controls?

• Over 15 years in industrial automation spare parts.
• Worldwide shipment support.
• Tested surplus and refurbished options.
• 12-month warranty on all products.
• Technical check before every shipment.
• Help for obsolete control systems.

FAQ

Q: Is body protection the same as hand protection?

A: No. Body protection uses 40 mm beam spacing. Hand protection uses 20 mm. Pick based on the risk you guard.

Q: Can GL-VM24LN detect a finger?

A: No. The minimum object size is ø45 mm. Use a hand protection model for finer detection.

Q: My machine opening is 900 mm. Will this fit?

A: Yes. Detection height is 920 mm and total length is 960 mm. Check bracket space first.

Q: How do I align 24 beams quickly?

A: Move the receiver slowly while watching the LEDs. Lock brackets once all beams show stable.

Q: Does it work near welding arcs?

A: It resists 20,000 lux sunlight and 3,000 lux incandescent light. Shield direct arc flash for best results.

Contact us: info@oiltechcontrols.com or +86 158 8020 0923.

Copyright © 2026 Oiltech Controls Limited. https://www.oiltechcontrols.com/ All rights reserved.