Entry type: FAQ Entry ID: 69778886, Entry date: 02/15/2017
3SE7 cable-operated switches: Achievable safety integrity level SIL (IEC 62061) or performance level PL (ISO 13849-1)
This entry contains information about the use of 3SE7 cable-operated switches in safety circuits.
Which safety integrity level SIL (IEC 62061) or performance level PL (ISO 13849-1) can be achieved with 3SE7 cable-operated switches?
ANSWER:Cable-operated switches with latching and button reset can be regarded as EMERGENCY STOP command devices.
They have a B10d value of 200 000 switching cycles at 10% of the rated load and a maximum service life T1 of 20 years.
The electrical interconnection can be implemented with one channel or two, whereby both contacts are integrated in a switch enclosure.
You can also adjust this constellation with the TÜV-approved Safety Evaluation Tool (SET).
In the Safety Evaluation Tool under the menu item "Library > IEC 62061 or ISO 13849-1" you can find the sub-item "EMERGENCY-STOP".
If you work through the entire application, you will receive at the end a TÜV-certified protocol listing the parameters attained.
This is the equivalent of the written confirmation which some customers require and ask for.
The SET is available to all users after free-of-charge registration.
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