Setup
3.4 Inputs and outputs
FST020 Function manual
Function Manual, 09/2017, A5E42949526-AA
63
● Medium temperature
● Kinematic viscosity
All process values are available for analog output channel 2 and frequency output channel 4.
The accuracy specified for the analog output signal applies only within the range 4 to 20 mA.
Lower limit (4 mA) and upper limit (20 mA) can be assigned to any specific flow values.
Lower fault current value
Recommended setting range for lower fault current
Recommended setting range for upper fault current
Figure 3-1 Current limits for NAMUR configuration
The fail safe current output signal can be selected to:
● Lower fault current (defined in the Loop current scale selection)
● Upper fault current (defined in the Loop current scale selection)
● Last valid value (the last process value before the failure occurred)
● Current value (actual measured value)
● Fail-safe value (within the range of 0 mA to 25 mA
1)
)
1)
For channel 1 the range is 3.5 mA to 25 mA
Output scaling configuration
Below are four examples describing configuration possibilities for a current output.
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