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 Maximum Protective Width Minimum Scanning Distance Maximum Scanning Distance Maximum Response Time Supply Voltage
RS Stock No. 125-0674
Mfr. Part No.F3SG-2RE0240P14
BrandOmron
MYR2,582.18
1 Pair
Pair(s)
- F3SG-RE 14mm Receiver, Sender 2 - C 23 240mm - 0.3 (Long) m, 0.3 (Short) m 3 (Short) m, 10 (Long) m 5 (ON to OFF) ms, 25 (OFF to ON Synchronized) ms, 125 (OFF to ON Not Synchronized) ms 24 V dc
RS Stock No. 757-7825
Mfr. Part No.F3SJ-E0545P25
BrandOmron
MYR6,245.25
1 Pair
Pair(s)
- F3SJ 20mm Receiver, Sender 4 3 E 26 545mm - 0.2m 7m 15 (On to Off) ms, 70 (Off to On) ms 24 V dc
RS Stock No. 127-8318
Mfr. Part No.XUSL4E3BB081N
MYR7,220.03
1 Pair
Pair(s)
Preventa XUSL4E 400mm Receiver, Transmitter 4 3 E 3 810mm - 0m 4 m, 12 m 3 ms 24 V dc
RS Stock No. 701-2956
Mfr. Part No.C2MT-07834BBC03FB0
BrandSick
MYR3,890.09
Each
units
MiniTwin C2MT 34mm Receiver, Sender 2 2 D - 780mm - 0m 8m 13 ms 24 V dc
RS Stock No. 920-9694
Mfr. Part No.2TLA022302R0100 Orion1-4-30-030-B
BrandABB
MYR4,909.20
1 Pair
Pair(s)
Orion1 - 30mm Receiver, Sender 4 - E 16 300mm - 0.2m 19m 11 ms 24 V dc
New
RS Stock No. 213-3710
Mfr. Part No.C4C-EA07510A10000
BrandSick
MYR5,809.09
Each
units
DeTec variant: deTec4 Core deTec 14mm Receiver Type 4 - PL e - 750mm 10m - - 13000 ?s 24 V
RS Stock No. 196-4117
Mfr. Part No.XUSL4MB30H151N
MYR14,416.19
1 Pair
Pair(s)
Preventa XUSL4M 30mm Receiver, Transmitter 4 3 - 76 1510mm - 0m 4 m, 12 m 20.5 ms 24 V dc
New
RS Stock No. 213-3716
Mfr. Part No.C4C-EA13530A10000
BrandSick
MYR6,030.21
Each
units
DeTec variant: deTec4 Core deTec 30mm Receiver Type 4 SIL 3 PL e - 1350mm 15m - - 12000 μs 24 V
New
RS Stock No. 213-3726
Mfr. Part No.C4MT-01214ABB03BE0
BrandSick
MYR3,365.31
Each
units
- miniTwin4 14mm 1 Twin-Stick Type 4 - PL e - 120mm 5m - - 14000 ?s 24 V
New
RS Stock No. 213-3707
Mfr. Part No.C2C-EA18030A10000
BrandSick
MYR4,270.68
Each
units
DeTec variant: deTec2 Core deTec 30mm Receiver - - PL c - 1800mm 15m - - 13000 ?s 24 V
RS Stock No. 146-5824
Mfr. Part No.SLC440COM-E-0490-30
BrandSchmersal
MYR4,607.12
Each
units
SLC440COM 440 30mm Sender - - - 24 490mm - 300mm 10000mm 10 ms 24 V dc
New
RS Stock No. 213-1809
Mfr. Part No.M2C-SA0340LA10
BrandSick
MYR1,669.72
Each
units
- deTem 400mm Sender - - PL c 3 - - - 17m 20000 μs 19.2 → 28.8 V dc
New
RS Stock No. 213-1806
Mfr. Part No.M2C-SA0250HA10
BrandSick
MYR1,724.63
Each
units
- deTem 500mm Sender - - PL c 2 - - - 90m 20000 μs 19.2 → 28.8 V dc
RS Stock No. 196-4125
Mfr. Part No.XUSL4MB40H196N
MYR15,367.24
1 Pair
Pair(s)
Preventa XUSL4M 40mm Receiver, Transmitter 4 3 - 66 1960mm - 0m 4 m, 12 m 18.5 ms 24 V dc
New
RS Stock No. 213-3704
Mfr. Part No.C2C-EA13530A10000
BrandSick
MYR3,011.14
Each
units
DeTec variant: deTec2 Core deTec 30mm Receiver 2 SIL 1 PL c - 1350mm 15m - - 12000 μs 24 V
RS Stock No. 136-3379
Mfr. Part No.C4C-EA12030A10000
BrandSick
MYR5,171.68
Each
units
DeTec4 Core C4C 30mm Receiver - - - - 1200mm - 0m 12m 14 ms 24 V dc
RS Stock No. 127-8303
Mfr. Part No.XUSL2E30H166N
MYR13,691.99
1 Pair of 1
Pair(s)
Preventa XUSL2E 30mm Receiver, Transmitter 2 1 C 83 1660mm - 0m 4 m, 12 m 21 ms 24 V dc
RS Stock No. 127-8306
Mfr. Part No.XUSL2E30H061N
MYR5,990.86
1 Pair of 1
Pair(s)
Preventa XUSL2E 30mm Receiver, Transmitter 2 1 C 31 610mm - 0m 4 m, 12 m 10 ms 24 V dc
RS Stock No. 182-9553
Mfr. Part No.SLLP23-1330P88
BrandBanner
MYR12,887.36
Each
units
- SLL 23mm Emitter, Receiver - 3 E - 1330mm - - 12m 20.9 ms 24 V dc
RS Stock No. 182-9584
Mfr. Part No.SLLP40-1680P88
BrandBanner
MYR18,714.69
Each
units
- SLL 40mm Emitter, Receiver - 3 E - 1680mm - - 12m 15 ms 24 V dc