Final Conditions For Safety-Related Parameters - Siemens 3RK1308‑0 00‑0CP0 Series Equipment Manual

Technical data

9.2 Final conditions for safety-related parameters

9.2 Final conditions for safety-related parameters
Safety-related parameters
The safety-related parameters in the data sheet have been determined on the basis of the
following final conditions:
● Side-by-side mounting at rated current I
● 100% ON period of electronics
● 40 °C ambient temperature
● DIN EN 60721-3-7 noxious gas environment: class 3C2
B10d value
NOTICE
Consider the B10d value stated for the motor starter in your application.
The maximum number of operating cycles (B10d) may not be exceeded within the mission
time T1.
If the expected number of operating cycles exceeds the B10d value during the device's
service life, you must set correspondingly shorter replacement intervals.
You can calculate the maximum service life of the device as follows: T10D = B10d / nop;
nop: Operating cycles/year
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 mission time
has been reached. Replace the device if either the electrical endurance or the mission time
has been exceeded. The application is outside of the specification if the maximum number of
starting operations is exceeded.
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.
172
n
Motor starter (3RK1308‑0**00‑0CP0)
Equipment Manual, 11/2019, A5E34821005002A/RS-AC/003