Functional Specification Of The Non-Safety Functions; Safety Parameters - PR electronics 9116 Mode D'emploi

Safety Manual
For RTD and linear resistance input sensors, cable resistances of up to 50 W per wire can be
compensated if 3- or 4-wire connection is configured.
For thermocouple sensors, cold junction temperature errors can be compensated, either by an
internally mounted temperature sensor, or by an accessory connector with a built-in temperature
sensor. The selection of CJC measurement must be done and verified by the end user.
6

functional specification of the non-safety functions

The status relay (terminal 33 and 34), error signal on power rail (terminal 91) and LED outputs
are not suitable for use in any Safety Instrumented Function.
7

Safety parameters

RTD, TC, LinR and Potentiometer input, Current output
Probability of dangerous Failure per Hour (PFH)
Probability of failure on demand (PFD) -
1 year proof test interval
Proof test interval (10% of loop PFD)
Safe Failure Fraction
RTD, TC, LinR and Potentiometer input, Relay output
Probability of dangerous Failure per Hour (PFH)
Probability of failure on demand (PFD) -
1 year proof test interval
Proof test interval (10% of loop PFD)
Safe Failure Fraction
Voltage input, Current output
Probability of dangerous Failure per Hour (PFH)
Probability of failure on demand (PFD) -
1 year proof test interval
Proof test interval (10% of loop PFD)
Safe Failure Fraction
Voltage input, Relay output
Probability of dangerous Failure per Hour (PFH)
Probability of failure on demand (PFD) -
1 year proof test interval
Proof test interval (10% of loop PFD)
Safe Failure Fraction
6
9116 UniverSal converter
Version No. V3R0
4.30E-08
1
Note
2.82E-04
4 years
93%
6.20E-08
1
Note
4.03E-04
3 years
90%
5.60E-08
1
Note
3.66E-04
3 years
93%
7.60E-08
1
Note
4.89E-04
2 years
91%