INDUSTRY COMPONENT

Safety Light Curtain

Safety light curtain for automated beverage container testing systems - non-contact safety device using infrared beams to detect intrusions into hazardous machine areas.

Component Specifications

Definition
A safety light curtain is an optoelectronic safety device consisting of a transmitter and receiver that creates an invisible curtain of infrared light beams. When any beam is interrupted by an object (such as a hand or tool), the device sends a stop signal to the machine's safety controller, immediately halting hazardous motion. In automated beverage container integrity testing systems, it protects operators from moving parts during container handling, positioning, and testing operations.
Working Principle
The transmitter emits parallel infrared light beams to the receiver. The receiver continuously monitors beam integrity. When any beam is broken, the safety relay de-energizes, sending a stop signal to the machine's safety-rated controller. The system uses coded light patterns and cross-checking to prevent false triggering from ambient light or interference.
Materials
Aluminum alloy housing (typically 6061-T6), polycarbonate or tempered glass protective windows, infrared LEDs (wavelength 880-950 nm), phototransistor receivers, silicone gaskets for IP65/IP67 protection, anodized or powder-coated finish.
Technical Parameters
ParameterTypical rangeNotes & selection driver
Output2 safety-rated OSSD outputs
Voltage24 VDC ±10%
Beam Count16-128 beams
Resolution14-40 mm beam spacing
Response Time< 20 ms
Muting FunctionConfigurable for automated material handling
Safety CategoryCategory 4, PL e (ISO 13849-1)
Protection Height300-2000 mm
Protection RatingIP65/IP67
Operating Distance0.3-20 m
Safety Integrity LevelSIL 3 (IEC 62061)

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

Standards
ISO 13855, ISO 13849-1, IEC 61496-1, IEC 62061, ANSI B11.19

Parent Products

This component is used in the following industrial products

Engineering Analysis

Risks & Mitigation
  • Electrical interference causing false trips
  • Misalignment reducing effectiveness
  • Dirt accumulation on optical surfaces
  • Inadequate response time for high-speed machinery
  • Improper installation bypassing safety functions
FMEA Triads
Trigger: Dirt or condensation on optical surfaces
Failure: Reduced light transmission causing false beam breaks
Mitigation: Regular cleaning schedule, heated optical windows, IP67 sealing
Trigger: Vibration-induced misalignment
Failure: Beam misalignment reducing detection capability
Mitigation: Rigid mounting brackets, vibration dampeners, regular alignment checks
Trigger: Power supply fluctuations
Failure: Intermittent operation or safety function loss
Mitigation: Dedicated regulated power supply, voltage monitoring, redundant power circuits

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance
Beam alignment tolerance: ±2.5° angular, ±5 mm positional at maximum operating distance. Response time tolerance: +0 ms / -5 ms from specified value.
Test Method
Functional testing using test rod of specified diameter, response time measurement with oscilloscope, alignment verification with alignment tools, safety function validation per ISO 13849-2.

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

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.

Manufacturers of Safety Light Curtain

7 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
Jining KeLi Photoelectric Industrial Co.,Ltd
Shandong, CN
Listed on the company's own website · profile compiled by CNFX from public sources
Nanjing KJT Electric Co,. LTD.
Jiangsu, CN
Listed on the company's own website · profile compiled by CNFX from public sources
Ningbo Vichnet Technology Co.,Ltd
Ningbo, Zhejiang, CN
Listed on the company's own website · profile compiled by CNFX from public sources
Tianjin G-TEK Sensor Technology Co., Ltd.
Tianjin, 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.

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Frequently Asked Questions

What is the difference between Type 2 and Type 4 safety light curtains?

Type 2 (according to IEC 61496) uses simple pulse modulation and is suitable for lower risk applications. Type 4 uses coded light patterns with cross-checking and redundancy, providing higher safety integrity (Category 4, PL e) required for hazardous machinery like automated beverage testing systems.

How often should safety light curtains be tested?

Daily functional testing is recommended, with comprehensive safety validation at least annually. Testing should verify all beams are functional, response time meets specifications, and the stop signal properly halts machine motion.

Can safety light curtains be used in wet environments?

Yes, with appropriate IP rating (IP65 for water jets, IP67 for temporary immersion). For beverage testing systems with potential liquid exposure, IP67-rated units with proper sealing are recommended.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

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.

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