Editorial Technical Reference

Safety Light Curtains

This page explains how Safety Light Curtains is classified within Motor Vehicle Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.

Technical Definition & Core Assembly

Photoelectric safety devices that create an invisible protective screen to detect intrusions into hazardous robotic work zones.

Representative product image. Confirm appearance and specifications with the manufacturer.

Product Specifications

Technical details and manufacturing context for Safety Light Curtains

Definition
Safety light curtains are critical safety components within the Smart Robotic Body-in-White Assembly System. They establish a protective optical barrier around robotic welding, handling, and assembly stations. When an object or person breaks the infrared light beams, the system immediately sends a stop signal to the robots and machinery, preventing collisions and ensuring operator safety during automated vehicle body assembly operations. These devices are designed to meet the requirements of IEC 61496, a standard for electro-sensitive protective equipment. The protective height ranges from 150 to 1200 mm, allowing selection based on the height of the hazardous zone. Resolution options of 14 to 30 mm enable finger or hand detection, with smaller values providing higher safety. Response time is between 10 and 30 ms, with faster response suitable for higher machine speeds. The operating range, or distance between transmitter and receiver, spans 0.3 to 6 meters. Supply voltage is 24 V DC ±10%, typical for industrial applications. Outputs are two PNP safety outputs (OSSD). Protection ratings of IP65 to IP67 ensure dust-tight and water-resistant operation. Operating temperature ranges from -10 to 55°C, outside which performance may be affected. Housing is made of aluminum alloy with polycarbonate windows, providing durability for industrial environments. Weight varies from 1.5 to 8 kg depending on protective height. These specifications are reference ranges; verify model-specific values and standards with the legal manufacturer or supplier before procurement and installation.
Working Principle
Safety light curtains operate by emitting parallel infrared light beams from a transmitter to a receiver unit. The receiver continuously monitors the integrity of all beams. Any interruption of one or more beams, indicating an intrusion into the protected area, triggers a safety-rated output signal (typically via OSSD - Output Signal Switching Device) that commands the controlled machinery (robots) to enter a safe state, either by stopping motion or reducing speed to safe levels. The system is designed to fail-safe, ensuring that any malfunction or beam interruption results in a safe state. The response time, typically 10-30 ms, is critical for ensuring timely machine stop. The resolution determines the smallest object size that can be detected, with 14 mm for finger detection and 30 mm for hand detection. The protective height must cover the entire hazardous zone. The operating range defines the maximum distance between transmitter and receiver. Proper alignment and regular testing are essential to maintain safety integrity.
Common Materials
Aluminum alloy housing, Polycarbonate protective windows, Infrared LEDs, Phototransistor receivers, PCB with safety-rated circuitry
Technical Parameters
ParameterTypical rangeNotes & selection driver
Protective Height150–1200 mmSelect based on the height of the hazardous zone.IEC 61496
Resolution14–30 mmFinger or hand detection; smaller for higher safety.IEC 61496
Response Time10–30 msFaster for higher machine speeds.IEC 61496
Operating Range0.3–6 mDistance between transmitter and receiver.IEC 61496
Supply Voltage24 ±10% V DCTypical industrial DC supply.IEC 61496
Output Type2 × PNPSafety outputs; OSSD.IEC 61496
Protection RatingIP65–IP67Dust-tight and water-resistant.IEC 60529
Operating Temperature-10–55 °COutside this range may affect performance.IEC 61496
Housing MaterialAluminum + PCDurable for industrial environments.
Weight1.5–8 kgDepends on protective height.

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM
  • Transmitter Unit
    Emits parallel infrared light beams to create the protective screen
    Material: Aluminum housing with polycarbonate window
  • Receiver Unit
    Detects the infrared beams and monitors for interruptions
    Material: Aluminum housing with phototransistor array
  • Control Unit
    Processes detection signals and outputs safety stop commands
    Material: PCB with safety-rated relays and processors
  • Mounting Brackets Part
    Secures transmitter and receiver units to assembly system framework
    Material: Steel with corrosion-resistant coating

Industrial Ecosystem & Supply Chain Structure

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Atmospheric pressure only (non-pressurized environments)
other spec: Protection height: 150mm to 2000mm, Resolution: 14mm to 40mm, Response time: ≤20ms, IP rating: IP65/IP67
temperature: -10°C to +55°C (operating), -25°C to +70°C (storage)
Media Compatibility
✓ Industrial robotic cells ✓ Automated assembly lines ✓ Packaging machinery zones
Unsuitable: High-vibration environments with continuous mechanical shock
Sizing Data Required
  • Required protective height (mm)
  • Minimum object resolution needed (mm)
  • Required safety distance from hazard (mm)

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Optical Misalignment
Cause: Mechanical vibration, thermal expansion, or physical impact causing emitter and receiver beams to fall out of alignment, resulting in loss of safety function or nuisance trips.
Contamination of Optical Surfaces
Cause: Accumulation of dust, oil, or debris on emitter/receiver lenses, reducing light transmission and potentially causing failure to detect intrusions or false safety signals.
Maintenance Indicators
  • Intermittent or persistent 'muting' or 'blanking' of beams without operator intervention
  • Visible accumulation of contaminants on emitter/receiver lenses or audible alarm indicating beam blockage
Engineering Tips
  • Implement regular alignment verification using manufacturer-recommended tools and procedures, especially after equipment maintenance or relocation
  • Establish a preventive cleaning schedule for optical surfaces using appropriate non-abrasive cleaners and lint-free materials, while ensuring environmental controls to minimize contamination ingress

Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.

Compliance & Manufacturing Standards

Applicable Standards
ISO 13855:2010 - Safety of machinery - Positioning of safeguards with respect to the approach speeds of parts of the human body ANSI B11.19-2019 - Performance Criteria for Safeguarding IEC 61496-1:2020 - Safety of machinery - Electro-sensitive protective equipment - Part 1: General requirements and tests

Quoted from the published standard.

Manufacturing Precision
  • Beam alignment accuracy: +/- 0.5°
  • Response time: +/- 10% of specified value
Quality Inspection
  • Functional safety test (including response time, muting function, and override verification)
  • Environmental durability test (IP rating validation for dust/water ingress and temperature cycling)

Manufacturers of Safety Light Curtains

3 companies list this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

Dongguan Dadi Electronic Technology Co., Ltd.
Guangdong, CN
Listed on the company's own website · profile compiled by CNFX from public sources
Yueqing Yumo Electric Co., Ltd.
Zhejiang, CN
Listed on the company's own website · profile compiled by CNFX from public sources
YUEQING YUMO ELECTRIC CO.,LTD
Zhejiang, CN
Also makes: Check Valve, Diaphragm Valve, Butterfly Valve and 9 more
Listed on the company's own website · profile compiled by CNFX from public sources

Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

Technical documentation
Request current drawings, revision history, and a signed specification sheet.
Manufacturing capability
Verify equipment lists, process limits, capacity, and representative production evidence.
Inspection readiness
Confirm test methods, calibrated equipment, sampling plans, and traceable reports.
Supplier transparency
Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Supply Chain Compatible Machinery & Devices

Automotive Wireless Power Transfer System

The Automotive Wireless Power Transfer System is an integrated solution for contactless charging of electric vehicles.

Explore Specs →
Automotive Active Suspension Damping System

The Automotive Active Suspension Damping System is an advanced suspension solution designed for motor vehicles.

Explore Specs →
Ground Assembly Unit

A foundational structural component that provides stable mounting and alignment for equipment within an industrial system.

Explore Specs →
Vehicle Assembly Unit

A modular component within an industrial system responsible for assembling vehicle structures and subassemblies.

Explore Specs →

Frequently Asked Questions

What is the protective height and how do I select it?

The protective height ranges from 150 to 1200 mm. Select it based on the height of the hazardous zone that needs to be monitored. The curtain must cover the entire area where intrusion could lead to injury. Verify the exact height required for your application with the manufacturer.

What resolution do I need for finger or hand detection?

Resolution options are 14 mm for finger detection and 30 mm for hand detection. Smaller resolution provides higher safety by detecting smaller objects. Choose based on the smallest body part that could enter the hazardous area. Confirm with the manufacturer for your specific risk assessment.

How does the response time affect safety?

Response time is 10-30 ms. Faster response times are required for higher machine speeds to ensure the machine stops before a person can reach the hazard. The total stopping time of the machine must be considered in the safety distance calculation. Verify the response time of the specific model and integrate it into your safety system design.

What are the environmental ratings and operating conditions?

The protection rating is IP65-IP67, meaning dust-tight and water-resistant. Operating temperature is -10 to 55°C. Outside this range, performance may be affected. Ensure the installation environment meets these conditions. For harsh environments, consult the manufacturer for suitable models.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.
Buyer enquiry

Request manufacturing insight for Safety Light Curtains

Ask for use case, specification boundaries, supplier type, and RFQ preparation information for this product.

Where it goes
Straight to the CNFX editorial desk, and to the manufacturer if this product is linked to a claimed profile. Nothing is broadcast to a supplier list.
Your details stay here
We do not sell or rent enquiry data, and we do not add you to a mailing list. Used only to answer this request.
No commission, no middleman
CNFX is a directory. We take no cut of any order and never negotiate on a supplier's behalf.
What we don't claim
A listing is not an endorsement. Qualify every supplier and verify every figure yourself before ordering.

Your business information is used only to process this request.

Thank you! Your message has been sent. We'll respond within 1–3 business days.
Sorry, we couldn't send your message. Please try again, or email us at contact@cnfx.com.

Need to Manufacture Safety Light Curtains?

Compare manufacturer profiles with relevant product and process capability.

Previous Product
Vehicle Assembly Unit
Last Product
Get QuotesChat