Product Overview
GL-VM28HN is a Type 4 safety light curtain from Keyence, part of the GL-V series. It uses 28 infrared beam axes for hand protection. The metal housing is small and robust. It works with NPN output and has a total length of 560 mm. This light curtain pairs a transmitter and receiver set. It offers reliable detection for industrial automation. The GL-VM28HN suits press brakes, robotic cells, and packaging lines.
Technical Specifications
| Brand | Keyence |
| Model | GL-VM28HN |
| Series | GL-V series |
| Type | Type 4 ESPE / AOPD |
| Protection | Hand protection |
| Beam axes | 28 |
| Detection height | 540 mm |
| Beam spacing | 20 mm |
| Min. object size | ø25 mm |
| Total length | 560 mm |
| Detecting distance | 0.3 to 15 m |
| Response time | max. 5.0 ms (OSSD, ON→OFF) |
| Light source | Infrared LED 850 nm, Exempt Group |
| Synchronization | Optical |
| Angular aperture | up to ±2.5° at 3 m or above |
| Output | NPN transistor x2 (OSSD) |
| Supply voltage | 24 VDC -20/+25%, ripple 10% or less |
| Current consumption | Transmitter max. 87 mA; Receiver max. 98 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 |
| Interference prevention | up to 2 units by series connection |
| Protection circuit | Reverse-connection, short-circuit, surge |
| 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 370 g; Receiver 380 g |
| Built-in ports | None |
| Protocols | None |
| Communication expansion | None |
Installation Guide
- Mount the transmitter and receiver facing each other.
- Keep alignment within ±2.5° for reliable optical sync.
- Use the 20 mm beam spacing to match hand protection needs.
- Connect 24 VDC power with Class 2 supply.
- Wire NPN outputs to the safety circuit.
- Check IP65/IP67 seals after installation.
- Verify response time does not exceed 5.0 ms.
- Test all 28 beam axes before operation.
Setup and Maintenance
Setup is simple. The GL-VM28HN uses optical synchronization. No special tools are needed. The indicator LED helps with alignment. Maintenance is low. Clean the front cover with a soft cloth. Check for dust or oil buildup. The metal housing resists vibration and shock. Regular inspection keeps the safety function active. For support, contact info@oiltechcontrols.com or +86 158 8020 0923.
Compatibility Notes
The GL-VM28HN works with standard safety relays and controllers. It supports NPN input devices. No communication port is built in. For series connection, up to 2 units can link. This reduces interference. The light curtain fits most industrial machines. It does not need extra adapters. Always match the supply voltage 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 come with a 12-month warranty. We ship by FedEx, UPS, or DHL. Tracking is provided. Orders ship within 1-2 business days. Contact us for urgent needs.
Typical Applications
- Press brakes and bending machines
- Robotic work cells
- Packaging and palletizing lines
- Assembly stations
- Material handling equipment
Diagnostic Capabilities
The GL-VM28HN shows status via indicator LEDs. The receiver has an ON/OFF output. If a beam is blocked, the OSSD turns off. Response time is max. 5.0 ms. This helps quick fault finding. No complex diagnostics are needed. The optical sync keeps channels aligned. For advanced checks, use a multimeter on the output.
Why Buy From Oiltech Controls?
- 15+ years in industrial automation spare parts.
- Global shipment support.
- Tested surplus and refurbished options.
- 12-month warranty on all products.
- Technical verification before shipment.
- Support for obsolete control systems.
FAQ
Q: What is the detection height?
A: 540 mm with 28 beams.
Q: Can I connect two units?
A: Yes, up to 2 units by series connection.
Q: What is the output type?
A: NPN transistor x2 (OSSD).
Q: What is the response time?
A: max. 5.0 ms.
Q: Is it waterproof?
A: Yes, IP65/IP67.
Q: What is the warranty?
A: 12 months.
Contact us: info@oiltechcontrols.com or +86 158 8020 0923.
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Original Source: https://www.oiltechcontrols.com/
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