Current Output - Siemens SITRANS FC430 Operating Instructions Manual

Channel
4
8.6.1

Current output

All four channels can be configured as current output. As the 4 to 20 mA output on channel 1
is Functional Safety approved (the element complies with SIL 2 in single-channel Safety
Instrumented Systems and with SIL 3 in dual-channel Safety Instrumented Systems
implementing a compare function to validate the output of the two redundant units).
Current output configuration
The following process values can be assigned to the current output:
● Massflow *
● Volumeflow *
● Corrected Volumeflow
● Density *
● Fluid Temperature
● Fraction A (Volumeflow or Massflow)
● Fraction B (Volumeflow or Massflow)
● Fraction A %
● Fraction B %
● Analog Dosing
Only the process variables listed above with * are available to be allocated to the 4-20 mA
output on Channel 1 (HART PV variable). All process variables are available through HART
(SV, TV and QV variables) and on all of Channels 2 to 4.
FC430 with HART
Operating Instructions, 05/2015, A5E03361511-AF
HW configuration
(fixed when ordering)
Current input
Signal output
Relay output
Signal input
Current input
SW configuration
available to the user
Current (0/4-20 mA)
•
Frequency or pulse
•
Three-stage analog valve dosing control
•
Discrete one or two-valve dosing control
•
Operational and alarm status
•
Discrete one or two-valve dosing control
•
Operational and alarm status
•
Dosing control
•
Totalizer reset
•
Remote zero adjust
•
Force or freeze output(s)
•
Functions
8.6 Inputs and outputs
139