Banner EZ-SCREEN­ Safety Light Curtain Systems - Manual (Page 13)

Calculating the Safety Distance (Minimum Distance)
Safety Distance (Ds), also called Minimum Distance (S), is the minimum distance required between the defined area and the closest
reachable hazard point. The distance is calculated so that when an object or a person is detected (by blocking a sensing beam), the EZ-
SCREEN Type 2 will send a stop signal to the machine, causing it to stop by the time the person can reach any machine hazard point.
The distance is calculated differently for domestic U.S. and European installations. Both methods take into account several factors, in-
cluding a calculated human speed, the total system stopping time (which itself has several components), and the depth penetration fac-
tor. After the distance has been determined, record the calculated distance on the Daily Checkout Card
WARNING: Proper Safety Distance
Banner EZ-SCREEN Type 2 emitters and receivers must be mounted at a distance from the nearest haz-
ard such that an individual cannot reach the hazard before cessation of hazardous motion or situation.
Failure to establish and maintain the minimum distance could result in increased risk of harm.
D
Figure 3. Safety distance and hard guarding
EZ-SCREEN® Type 2 Light Screen Instruction Manual
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