Siemens SITRANS F Operating Instructions Manual page 122

Functions
8.6 Inputs and outputs
①
②
③
④
⑤
⑥
⑦
Figure 8-6
The fail safe current output signal can be selected to:
● Minimum Current (defined in the Current Mode selection)
● Maximum Current (defined in the Current Mode selection)
● Last Good Value (the last process value before the failure occurred)
● Current Value (actual measured value)
● User Defined Value (within the range of 0 mA to 25 mA
For channel 1 the range is 3.5 mA to 25 mA
1)
Output scaling configuration
Below are four examples describing configuration possibilities for a current output.
120
Linear control range
Measuring range lower limit
Measuring range upper limit
Lower fault current value
Recommended setting range for lower fault current
Recommended setting range for upper fault current
Measuring range
Current limits
)
1)
SITRANS FC430 with HART
Operating Instructions, 03/2012, A5E03361511-01