|Beam blockage||Blockage / shadowing of a beam below the set switching threshold|
|Beam pitch||Distance between the centers of two adjacent Photo elements.|
|Beam spacing||Distance between the centers of two adjacent light axes.|
|Calibration||Calculation and power outage safe storage of reference values.|
|Cycle time||Is the time needed to analyze all beams of a light grid once and to process and display the results.|
|Dark area||Area of blocked beams|
|Dark switching||Switching signal is on, if a beam is blocked or the criterion for switching is fulfilled.
Terms also used: Normally-Open (NO, N/O)
|Light area||Area of non-blocked beams|
|Light axis||Optical path, path of the light beam|
|Light switching||Switching signal is on, if the monitoring area is clear or if criterion for switching is not fulfilled.
Terms also used: Normally-Closed (NC, N/C)
|Logical beams||Total number of light axes (sum of physical and diagonal or crossed beams).|
|Monitoring area||The height of the monitoring area is the distance from first to last beam of the light grid.
Terms also used: Measurement zone, active area
|Physical beams||Number of photo elements in a transmitter or receiver profile.|
|Range||Distance between transmitter and receiver profiles.|
|Reference values||Reference values are the brightness values at the time of calibration|
|relative switching threshold||Set parameter value below which a beam is interpreted as blocked.
The ratio between signal strength and stored relative value is being used for this analysis.
|Resolution||Minimum size of the detectable object|
|Response time||Time from beam blockage by an object until switching of the output.|
|Signal intensity||The signal value recorded by the receiver. Also called „brightness level“.|
|Signal intensity indicators||LED C-F on external controllers.|
|Switching threshold||Signal strength below which a beam is interpreted as blocked.|