Light Curtains

Safety light curtains are also known as safety light barriers or safety light screens. These optoelectronic devices are used to detect people present in the vicinity of moving machinery. Light curtains can be used as an alternative to mechanical barriers and other forms of traditional machine guarding. A set of light curtains contains a transmitter head and a receiver head. A transmitter generates an infra-red light between the two heads which acts as a detection zone. A movement detected within the detection zone initials the machine stopping procedure and automatically disconnect all hazardous machinery.

To reactivate the machinery, an operator has to press reset button that is positioned outside of the danger area. Some models are equipped with an auto-reset option that automatically starts machinery once the detection zone is free of obstacles. A response time of all light curtains is just a fraction of a second, it means that no other barrier type can compare to that.

Light curtains are great safety devices that are used to keep people safe around hazardous machinery which could cause them harm. They can help ensure user safety during routine operations like maintenance and repair.

Selecting the right light curtains

Maximum scanning distance and beam resolution are 2 important attributes that determine the right device for you. A distance between transmitter and receiver can be various from 0 to 20m and the choice depends on the type of machinery that is used in conjunction with the curtain.

Beam resolution determines detection capability, light curtains with 14 mm beam resolution are able to detect small body parts such as a finger, 20 mm ones are suitable for palm detection. Beam resolution of 20 mm and above are ideal for hand, head or full body detection. Typical beam resolution values are between 14 mm to even 70 mm.

Typical Applications

Light curtains are a way of safeguarding employees from dangerous machines. The design of the safety light curtain offers more flexibility and simplifies machine set up, maintenance and repair than other solid traditional guarding systems such as mechanical barriers and sliding gates. They can be found in various applications including:

  • Packaging machines
  • Process machinery
  • Automated warehouses
  • Textile machinery
  • Electronic component assembly lines
  • Mechanical and hydraulic power presses

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Description Price Range Series Beam Resolution Component Type Safety Type SIL IEC 61508 PL EN ISO 13849-1 Number of Beams Protective Height Minimum Scanning Distance Maximum Scanning Distance Maximum Response Time Supply Voltage Application
RS Stock No. 757-7879
Mfr. Part No.OS32C-SP1
BrandOmron
HK$39,186.73
Each
units
- 0S32C 30 mm, 40 mm, 50 mm, 70 mm Scanner 3 2 D - - - 3m 680 (On to Off) ms, 780 (Off to On) ms 24 V dc -
RS Stock No. 913-9286
Mfr. Part No.C2C-EA12030A10000
BrandSick
HK$6,705.47
Each
units
DeTec2 Core - 30mm Receiver 2 1 C - 1200mm 0m 10 (Minimum) m, 12 (Typical) m 12 ms 24 V dc Body, Hand
RS Stock No. 511-7068
Mfr. Part No.1K3-104
BrandSmartscan
HK$6,016.87
Each
units
- 1000 Plus 30mm Receiver, Sender 3 2 D 24 630mm 0.5m 5m 40 ms 24 V dc Hand
RS Stock No. 862-5865
Mfr. Part No.OS32C-BP-4M
BrandOmron
HK$42,060.56
Each
units
- 0S32C 30 mm, 40 mm, 50 mm, 70 mm Scanner 3 2 D - - - 4m 680 (On to Off) ms, 780 (Off to On) ms 24 V dc -
RS Stock No. 757-7702
Mfr. Part No.F3S-TGR-CL2A-035-300
BrandOmron
HK$6,191.97
1 Pair
Pair(s)
- F3S-TGR-CL 35mm Receiver, Sender 2 - C 2 300mm 0.2m 14m 103 ms 24 V dc Finger, Hand
RS Stock No. 920-9710
Mfr. Part No.2TLA022303R0700
BrandABB
HK$22,344.58
1 Pair
Pair(s)
Orion1 - 30mm Receiver, Sender 4 - E 64 1200mm 0.2m 20m 19 (No Code) ms, 29 (With Code) ms 24 V dc Hand
RS Stock No. 182-9539
Mfr. Part No.SLLP23-420P88
BrandBanner
HK$10,020.76
Each
units
- SLL 23mm Emitter, Receiver - 3 E - 420mm - 12m 9.9 ms 24 V dc Area
RS Stock No. 127-8333
Mfr. Part No.XUSL4E30H166N
HK$25,412.18
1 Pair of 1
Pair(s)
Preventa XUSL4E 30mm Receiver, Transmitter 4 3 E 83 1660mm 0m 4 m, 12 m 20.5 ms 24 V dc Hand
RS Stock No. 182-9540
Mfr. Part No.SLLP23-490P88
BrandBanner
HK$8,400.38
Each
units
- SLL 23mm Emitter, Receiver - 3 E - 490mm - 12m 10.8 ms 24 V dc Area
RS Stock No. 701-2965
Mfr. Part No.C2MT-09034BBC03FE0
BrandSick
HK$6,375.11
Each
units
MiniTwin C2MT 34mm Receiver, Sender 2 2 D - 900mm 0m 8m 13 ms 24 V dc Hand
RS Stock No. 146-5858
Mfr. Part No.SLC440COM-R-1610-14
BrandSchmersal
HK$22,585.39
Each
units
SLC440COM 440 14mm Receiver - - - 160 1610mm 300mm 6000mm 28 ms 24 V dc Elevators & Escalators, Food, Heavy Industry, Machine Tools, Packaging
RS Stock No. 182-9541
Mfr. Part No.SLLP23-560P48
BrandBanner
HK$11,567.01
Each
units
- SLL 23mm Emitter, Receiver - 3 E - 560mm - 12m 11.6 ms 24 V dc Area
RS Stock No. 757-7709
Mfr. Part No.F3S-TGR-CL2A-035-150
BrandOmron
HK$4,807.06
1 Pair
Pair(s)
- F3S-TGR-CL 35mm Receiver, Sender 2 - C 2 150mm 0.2m 14m 103 ms 24 V dc Finger, Hand
RS Stock No. 196-4101
Mfr. Part No.XUSL4MA40H181N
HK$31,442.50
1 Pair
Pair(s)
Preventa XUSL4M 40mm Receiver, Transmitter 4 3 - 61 1810mm 0m 4 m, 12 m 17.5 ms 24 V dc Hand
RS Stock No. 182-9576
Mfr. Part No.SLLP40-1120P88
BrandBanner
HK$24,260.70
Each
units
- SLL 40mm Emitter, Receiver - 3 E - 1120mm - 12m 11.6 ms 24 V dc Area
RS Stock No. 146-5845
Mfr. Part No.SLC440COM-R-0490-30
BrandSchmersal
HK$8,656.78
Each
units
SLC440COM 440 30mm Receiver - - - 24 490mm 300mm 10000mm 10 ms 24 V dc Elevators & Escalators, Food, Heavy Industry, Machine Tools, Packaging
RS Stock No. 757-7661
Mfr. Part No.F3S-TGR-CL2A-014-750
BrandOmron
HK$11,546.71
1 Pair
Pair(s)
- F3S-TGR-CL 14mm Receiver, Sender 2 - C 2 750mm 0.2m 6m 103 ms 24 V dc Finger, Hand
RS Stock No. 182-9542
Mfr. Part No.SLLP23-630P88
BrandBanner
HK$12,935.23
Each
units
- SLL 23mm Emitter, Receiver - 3 E - 630mm - 12m 12.5 ms 24 V dc Area
RS Stock No. 196-4102
Mfr. Part No.XUSL4MA40H196N
HK$32,446.47
1 Pair
Pair(s)
Preventa XUSL4M 40mm Receiver, Transmitter 4 3 - 66 1960mm 0m 4 m, 12 m 18.5 ms 24 V dc Hand
RS Stock No. 182-9561
Mfr. Part No.SLLP23-1820P88
BrandBanner
HK$22,644.93
Each
units
- SLL 23mm Emitter, Receiver - 3 E - 1820mm - 12m 26.9 ms 24 V dc Area
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