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. 196-4119
Mfr. Part No.XUSL4MB40H106N
TWD78,403.00
1 Pair
Pair(s)
Preventa XUSL4M 40mm Receiver, Transmitter 4 3 - 36 1060mm - 0m 4 m, 12 m 12.5 ms 24 V dc
RS Stock No. 196-4120
Mfr. Part No.XUSL4MB40H121N
TWD84,266.00
1 Pair
Pair(s)
Preventa XUSL4M 40mm Receiver, Transmitter 4 3 - 41 1210mm - 0m 4 m, 12 m 13.5 ms 24 V dc
RS Stock No. 196-4130
Mfr. Part No.XUSL4MB3BB081N
TWD53,068.00
1 Pair
Pair(s)
Preventa XUSL4M 400mm Receiver, Transmitter 4 3 - 3 810mm - 0m 4 m, 12 m 5.5 ms 24 V dc
RS Stock No. 196-4121
Mfr. Part No.XUSL4MB40H136N
TWD88,203.00
1 Pair
Pair(s)
Preventa XUSL4M 40mm Receiver, Transmitter 4 3 - 46 1360mm - 0m 4 m, 12 m 14.5 ms 24 V dc
RS Stock No. 196-4122
Mfr. Part No.XUSL4MB40H151N
TWD93,467.00
1 Pair
Pair(s)
Preventa XUSL4M 40mm Receiver, Transmitter 4 3 - 51 1510mm - 0m 4 m, 12 m 15.5 ms 24 V dc
RS Stock No. 196-4088
Mfr. Part No.XUSL4MA30H076N
TWD120,172.00
1 Pair
Pair(s)
Preventa XUSL4M 30mm Receiver, Transmitter 4 3 - 38 760mm - 0m 4 m, 12 m 12.5 ms 24 V dc
RS Stock No. 196-4127
Mfr. Part No.XUSL4MB40H226N
TWD112,425.00
1 Pair
Pair(s)
Preventa XUSL4M 40mm Receiver, Transmitter 4 3 - 76 2260mm - 0m 4 m, 12 m 20.5 ms 24 V dc
RS Stock No. 196-4085
Mfr. Part No.XUSL4MA30H031N
TWD97,105.00
1 Pair
Pair(s)
Preventa XUSL4M 30mm Receiver, Transmitter 4 3 - 16 310mm - 0m 4 m, 12 m 8 ms 24 V dc
RS Stock No. 127-8323
Mfr. Part No.XUSL4E2BB051L
TWD52,180.00
1 Pair
Pair(s)
Preventa XUSL4E 500mm Receiver, Transmitter 4 3 E 2 510mm - 3m 10 m, 20 m 2.5 ms 24 V dc
RS Stock No. 196-4105
Mfr. Part No.XUSL4MA2BB051N
TWD69,715.00
1 Pair
Pair(s)
Preventa XUSL4M 500mm Receiver, Transmitter 4 3 - 2 510mm - 0m 4 m, 12 m 5.5 ms 24 V dc
RS Stock No. 196-4125
Mfr. Part No.XUSL4MB40H196N
TWD104,081.00
1 Pair
Pair(s)
Preventa XUSL4M 40mm Receiver, Transmitter 4 3 - 66 1960mm - 0m 4 m, 12 m 18.5 ms 24 V dc
RS Stock No. 196-4092
Mfr. Part No.XUSL4MA30H121N
TWD146,963.00
1 Pair
Pair(s)
Preventa XUSL4M 30mm Receiver, Transmitter 4 3 - 61 1210mm - 0m 4 m, 12 m 17.6 ms 24 V dc
RS Stock No. 127-8315
Mfr. Part No.XUSL4E14F016N
TWD49,259.00
1 Pair
Pair(s)
Preventa XUSL4E 14mm Receiver, Transmitter 4 3 E 15 160mm - 0 m, 1 m 3 m, 6 m 4 ms 24 V dc
RS Stock No. 196-4102
Mfr. Part No.XUSL4MA40H196N
TWD128,133.00
1 Pair
Pair(s)
Preventa XUSL4M 40mm Receiver, Transmitter 4 3 - 66 1960mm - 0m 4 m, 12 m 18.5 ms 24 V dc
RS Stock No. 196-4099
Mfr. Part No.XUSL4MA40H151N
TWD115,037.00
1 Pair
Pair(s)
Preventa XUSL4M 40mm Receiver, Transmitter 4 3 - 51 1510mm - 0m 4 m, 12 m 15.5 ms 24 V dc
RS Stock No. 127-8331
Mfr. Part No.XUSL4E2BB051N
TWD51,401.00
1 Pair
Pair(s)
Preventa XUSL4E 500mm Receiver, Transmitter 4 3 E 2 510mm - 0m 4 m, 12 m 2.5 ms 24 V dc
RS Stock No. 196-4131
Mfr. Part No.XUSL4MB4BB091N
TWD58,802.00
1 Pair
Pair(s)
Preventa XUSL4M 300mm Receiver, Transmitter 4 3 - 4 910mm - 0m 4 m, 12 m 5.5 ms 24 V dc
RS Stock No. 196-4124
Mfr. Part No.XUSL4MB40H181N
TWD100,860.00
1 Pair
Pair(s)
Preventa XUSL4M 40mm Receiver, Transmitter 4 3 - 61 1810mm - 0m 4 m, 12 m 17.5 ms 24 V dc
RS Stock No. 127-8302
Mfr. Part No.XUSL2E4BB091N
TWD45,042.00
1 Pair
Pair(s)
Preventa XUSL2E 300mm Receiver, Transmitter 2 1 C 7 910mm - 0m 4 m, 12 m 3.5 ms 24 V dc
RS Stock No. 196-4118
Mfr. Part No.XUSL4MB40H091N
TWD72,026.00
1 Pair
Pair(s)
Preventa XUSL4M 40mm Receiver, Transmitter 4 3 - 31 910mm - 0m 4 m, 12 m 11 ms 24 V dc