Siemens SIMATIC ET 200SP Manual page 118

Technical data
6.2 Final conditions for safety-related parameters
T1 proof test interval
The T1 proof test interval is defined by the device's internal tests and by the switching cycle
duration.
T1
min
minutes.
T1
max
switching cycle has been run after one month.
Validity of safety engineering data
The safety engineering data specified in the data sheet is valid under the following
prerequisites:
The specified PFH/PFD value is valid until the electrical endurance (B10) or the service life
has been reached. Replace the device if either the electrical lifetime or the service life has
been exceeded. The application is outside of the specification if the maximum number of
starting operations is exceeded once per hour.
Note
Definition of "number of starting operations"
The "number of starting operations" stands for the frequency of switching of the main
conducting path switching elements, i.e. switching on and off of the connected motor and not
requesting of STO via the power supply or the fail-safe digital input.
118
= 10 min is fulfilled if the motor starter's switching cycle duration is less than ten
= 1 month is achieved if the motor is operated in uninterrupted duty and the test
Motor starter (3RK1308-0**00-0CP0)
Manual, 12/2016, A5E34821005002A/RS-AB/002