4.3.6
Hazardous area protection
The safety laser scanner is mounted with a horizontal scan plane in a stationary
application, for example on a machine where the hazardous area is not completely
surrounded by a physical guard. During hazardous area protection, the safety laser
scanner detects a person’s legs. The protective field is parallel to the person’s direction
of approach.
S
S
Figure 25: Stationary application with horizontal scan plane for hazardous area protection
NOTE
Mark the outline of the protective field boundaries on the floor after you have worked
out the protective field size. By doing this, you allow machine operators to see the pro‐
tective field boundaries and make it easier to thoroughly check the protective function
at a later date.
4.3.6.1
Overview
The protective field must be designed so that it detects a person at a minimum
distance from the hazardous point. This distance is required to prevent a person or
part of their body from reaching the hazardous area before the end of the machine’s
dangerous state.
In hazardous area protection, the minimum distance typically defines the protective
field size required.
If you define a number of monitoring cases with different protective fields, you must
calculate the protective field size separately for each protective field used.
In many cases, a resolution of 50 mm to 70 mm is suitable for hazardous area
protection.
4
PROJECT PLANNING
34
O P E R A T I N G I N S T R U C T I O N S | microScan3 – PROFINET
8021219/1ELL/2022-01-21 | SICK
Subject to change without notice
