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03/01/2018

Product Showcase: March 2018

This month we focus on Safety Light Curtains

Safety light curtains are a non-separating guard used for the protection of hazardous areas. They detect the passage of objects and direct the machine to stop the hazard. Because they do not provide a physical barrier, consideration must be made to place them a suitable distance from the hazard point to ensure the hazard is stopped in time. 

The safety light curtain is an array of infrared (non-visible) beams. The protection height is the distance between the top and bottom beams in the array, and its range is the distance between the emitter and receiver units. These two figures define the area that can be covered by the light curtain. The resolution of the light curtain is the distance between two adjacent beams, or the smallest object profile dimension that will be reliably detected passing through the array. Common resolutions include 14 mm for finger detection, 30 mm for hand detection, and 50 mm for whole body detection.  

Schmersal’s safety light curtains feature a one-piece extruded reinforced housing. This housing profile has proven to be less susceptible to mechanical damage and misalignment from torsion or bending because it does not rely on the lens for structural integrity.  

The SLC440/445 safety light curtains have two additional features: an LED illuminated end cap allows the operating status to be seen from a distance. Also, these light curtains are easier to set up because the selection and configuration of the various integrated functions are made via a single push-button. After completion, the selections are stored in the system. This user-friendly method does not require separate software or costly set-up devices. 

The light curtains presented below are Type 4 devices, which defined by EN 61496-1 means they are a protective device whose safety function is not affected by a failure or error in the system. They are suitable for use in safety circuits up to PLe (EN 13849) or SIL3 (IEC 61508). 

They are also available as safety light grids (SLG) with 2, 3, or 4 beams, for perimeter guarding.

 

 Safety Light Curtains:

SLC440COM

LED Endcap
Compact rectangular profile 28 mm x 33 mm
Setup / alignment mode
Start/restart interlock
Range up to 10 meters
14, 30, or 35 mm resolutions
Protection field heights: 330 mm to 1930 mm
IP67 Rating
Bluetooth interface for secure data transfer to SLC Assist App

Get more information from the Online product catalog

Download the SLC440COM Tech Brief

 

SLC440

LED Endcap and 7 segment display
Compact rectangular profile 28 mm x 33 mm
Setup / alignment mode
Functions:

  • Start/restart interlock
  • Fixed or floating blanking
  • Contactor control
  • Double reset/acknowledgement
  • Beam coding

Range up to 10 meters
14 or 30 mm resolutions
Protection field heights: 170 mm to 1930 mm
IP67 Rating
Bluetooth interface for secure data transfer to SLC Assist App

Get more information from the Online Product Catalog

Download the SLC440 Tech Brief
 

SLC445

LED Endcap and 7 segment display
Compact rectangular profile 28 mm x 33 mm
Setup / alignment mode
Additional Functions:

  • Muting
  • Cyclic Operation
  • Mutiscan

Range up to 10 meters
14 or 30 mm resolutions
Protection field heights: 170 mm to 1770 mm
IP67 Rating

Get more information from the Online Product Catalog

Download the SLC445 Tech Brief

 

SLC420

High range option, up to 18 meters.
Round profile, 49 mm dia.
Range up to 10 meters
14, 30, or 50 mm resolutions
Protection field heights: 170 mm to 1770 mm
IP67 Rating

Get more information from the Online product catalog

 

SLC440 IP69

IP69 Rated housing for wash down applications
Round profile, 50 mm dia.
Prewired cable with connector
Stainless steel or plastic endcaps
Available for SLC440 and SLC440COM
Protection field heights: 170 mm to 1770 mm

Get more information from the Online Product Catalog

Download the IP69K Tech Brief

 

Accessories

We offer a wide variety of accessories such as deflection mirrors, mounting stands, connection cables, programming cable, test rods, mounting brackets, and muting sensors sets.

Get more information from the Online Product Catalog

 

 

 

 

Additional Resources:

Download the Optoelectronics catalog

Download the Calculating Safety Distances technical article

Download the Light Curtain Terminology technical article

View the Webinar: Machine Safeguarding II: Non Separating Guards   .

 

 

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