9 - Parallel approach to a detection zone

When the direction of approach is parallel to the detection device, the minimum distance S, in millimeters [mm], shall be calculated using the following equation:

S=(K×T)+D_DS+Z

Where:
K=1600 [mm/s]
D_DS=1200 [mm]
Z is a supplemental distance factor, in [mm]

In addition, the height of the detection zone with respect to the reference plane H_D directly related to actual detection capability d_e of the ESPE must respect the following inequality:

H_D ≥ 15∙(d_e-50)

H_D shall neither be less than 0 [mm] nor greater than 1000 [mm]. However, if the height of the detection zone H_D from the reference plane is greater than 200 [mm], there is a risk of inadvertentl undetected access below the detection zone.