How to choose a safety category?
According to the EN954-1 standard, the safety category is determined by the following characteristic properties:
- machine movement
- access frequency: means "any moment a worker opens the machine door".
Safety category |
Risk |
Description |
System behavior |
BTI options |
1 |
SMALL | Does not cause the machine to stop. Causes minor injury or damage (eq. slight squeeze). | The presence of an erro can lead to a loss of safety function. | OPTOS2S, 2SSR24V, 2SS24BX, 3SSR24V, 4SS24BX, 5SS24BX, 7SSR24V |
2 |
BIG | The movement of the machine is slow: < 2 meters per second. Max. accessibility is once during business hours. |
Periodic monitoring of the safety function is present. Error must be detected at every inspection. But in the time between two inspections, the safety function can be lost. | more ANATOM6S connected to AWAX. |
3 |
BIG | The movement of the machine is slow: < 2 meters per second. Accessibility frequency > once during business hours. |
An individual error does not lead to the loss of safety function. A safety function is provided except in the event of the accumulation of several undetected errors. | One or more AMX3, AMX4, AMX5, BOSTER.
One or more VIGIL SXR. Multiple switches ANATOM78S/98S, EPINUS, TRITHON, OPTOPUS, ANATOM M18 connected to AWAX. |
4 |
BIG | The movement of the machine is fast: > 2 meters per second.
Accessibility frequency > once during business hours. |
An individual error does not lead to the loss of safety function. Any error must be detected as soon as it occurs. Accumulation of multiple errors does not lead to the loss of safety function. Thus, the safety function is always performed. | One or more AMX4, AMX5, BOSTER with only one safety module
One or more VIGIL SXRS. One ANATOM6S/ 78S/98S, EPINUS, TRITHON, OPTOPUS, ANATOM M18 connected to AWAX. |