Allen-Bradley SafeZone Mini User Manual page 50

Chapter 4 Mounting
50
Figure 21 - Stopping Distance as a Function of the Vehicle Velocity
Stopping distance
Stopping distance +
safety supplements
Necessary protective
field length
Calculate the stopping distance S
S = S + S + S
A Br AnF AnS
Variable Description
S Braking distance, to be found in the vehicle documentation
Br
S Distance that is covered during the response time of the vehicle controller, to be found in the vehicle
AnF
documentation
S Distance that is covered during the response time of the safety laser scanner
AnS
The distance that is covered during the response time of the safety laser scanner
depends on the following:
• The response time of the safety laser scanner.
• The maximum velocity of the vehicle in your mobile application.
The response time TS of the SafeZone Mini device depends on the following:
• The basic response time of the SafeZone Mini device.
• The multiple sampling set.
See OSSD Response Times on page
Calculate the Distance S
AnS
This distance is covered during the response time of the safety laser scanner.
Calculate the distance S
S = T × V
AnS S max
Variable Description
T Response time of the safety laser scanner
S
V Maximum velocity of the vehicle from the related vehicle documentation
max
Rockwell Automation Publication 442L-UM005B-EN-P - April 2017
Speed
with the formula:
A
84.
with the formula:
AnS