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Automotive Industry Technology Update – Guarding
European Norms for Machines and Equipment Safety
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EN 292 - Machine and equipment safety
European norms 292-1 and 292-2 contain fundamental information, especially regarding separating safety devices.
Separating safety devices are physical barriers that, on the one hand, hinder the entrance to a source of danger and, on the other hand, offer protection against parts that fly out, leaking liquid materials or similar things.
The barrier, a housing, a fence or shell for example, must be constructed in a way that it cannot be removed without tools or with force. The EcoSafe Modular System by Bosch Rexroth fulfils these requirements with, at the same time, simple assembly.
The actual setup in each case requires a risk evaluation according to EN 292-1.
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EN 294 - Safety distances against reaching danger zones with upper limbs
The safety distances are dependent on the protective barrier height and the openings in the protective grille. With a Bosch Rexroth EcoSafe Protective Fence System mesh width of 40 x 40 mm you need a distance of merely 200 mm from the danger zone. The standard fence height of 2000 mm also offers sufficient protection at a relatively small safety distance.
The diagrams shown below present a profile of the safety distances in consideration of EN 294 as well as EN 811 for two different system heights.
Protective fences with a height of less than 1400 mm do not guarantee personal safety.
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EN 811 - Safety distances against reaching danger zones with lower limbs
EN 811 allows larger openings than EN 294 if the following prerequisites have been fulfilled:
- All people to be taken into consideration are at least 14 years old.
- It can be demonstrated that only the lower limbs will be used to reach the danger zones.
Openings larger than 180 mm (slot-shaped) or 240 mm (square/round-shaped) allow the whole body entry according to EN 811. In addition there is a further ruling for distances to the floor in which access is assumed from the standing position. At 200 mm from the floor the resulting safety distance, as shown here, is 665 mm in the foot area.
Relevant Links to Guarding:
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