Safety function
SM/TSP/SIL-EN SensyTemp TSP 9
The DCS loop must be capable of providing the required voltage level when the current output
is running with the configured high alarm.
The device does not meet safety requirements under the following conditions:
• During configuration
• When write protection is deactivated
• With activated HART multidrop mode
• During a simulation
• During an inspection of the safety function
Warning!
The safety function for the device includes the basic device TSPxxx with built-in TTH300
transmitter. Information in the corresponding documentation must be taken into consideration.
The percentage of failures that do not place the device in a hazardous functional state is
provided by the SFF value.
Total safety accuracy
The value defined for the overall accuracy of the safety function for this device is ± 2% of the
measuring range.
The basic accuracy depends on the sensor model and can be found in the appropriate data
sheets.
Switch-on time and safety operating mode
After switching on the device, all safety-relevant errors are detected after 2 minutes in low
demand mode.
6.3 SensyTemp temperature sensors without transmitter
SensyTemp TSP temperature sensors without transmitter provide an output signal suited to the
sensor (resistance or thermocouple). For failure rates based on the FMEDA report, refer to the
section “Safety Engineering Parameters”. These failure rates must be taken into consideration
when connecting to certified transmitters acc. to safety standards.
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