En Iec 61496 =link= Jun 2026

| Type | Description | Risk Level Application | Fault Tolerance | | :--- | :--- | :--- | :--- | | | Basic safety functionality. | Low risk. Typically used in entry/exit guarding or where the consequence of failure is minor. | Low. A single fault can lead to the loss of the safety function. | | Type 3 | Intermediate safety. | Medium risk. | Medium. Some faults are detected, but not all single faults are guaranteed to be safe. | | Type 4 | Highest safety performance. | High risk. Used for point-of-operation guarding (e.g., stopping a press). | High. The safety function is maintained even in the presence of a single fault. |

Using non-compliant or improperly rated protective equipment is a significant liability. Compliance ensures: en iec 61496