Other features include: ■ Minimum resolution can be set to 30, 40, 50, or 70 mm. ■ Safety zone varies with resolution:
■ 1.75 m (30 mm resolution) ■ 2.5 m (40 mm resolution) ■ 3.0 m (50 mm resolution) ■ 4.0 m (70 mm resolution)
■ Warning zone radius up to 15 m ■ Configurable response time from 80 ms up to 680 ms. ■ Zone switching time can be set from 20 ms to 320 ms Triple fields with selectable sampling and resolution SICK's S300 Mini Standard safety laser scanners feature selectable detection resolutions and sampling levels. For example, model S32B-2011BA supports 30, 40, 50, and 70 mm resolution diameters. Multiple sampling and resolutions can be individually defined for each field, including simultaneous protective fields (Figure 5). These scanners support up to 48 freely configurable fields and 16 switchable field sets. The triple field function enables a protective field and two warning fields to be used simultaneously.
Figure 5: The S300 Mini Standard safety laser scanners can implement multiple sampling levels and different resolutions for each scan field. (Image source: SICK)
Eliminating the need for a safety PLC The SX5 safety laser scanners from Banner Engineering feature an integral muting function that can monitor and respond to signals and automatically suspend the safeguarding function to allow an object to pass through the safety zone without generating a stop command. The muting function allows the suspension of the entire safety zone (total muting) or just a section of the safety zone (partial dynamic muting). An SX5 master unit, like the SX5- ME70, can control up to three remote units like the SX5-R; the scanner can also read incremental encoder inputs to modify the
safety zone based on the vehicle's speed. These functions can eliminate the need for additional control hardware like a safety PLC.
Conclusion
If properly specified, configured, and integrated, safety laser scanners are well suited to protect people and machines in applications like access control, area protection, and on mobile systems, including AGVs and AMRs. They meet the requirements of PLd and SIL3 and are suitable for use in applications where safety is an important consideration. These scanners are available with various combinations of features and functions to suit a range of application needs.
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