Vega VEGAPULS 61 Safety manual - page 8
In the adjustment software, the parameter "Sensor according
to SIL" must be selected in the menu level "Basic adjustment".
If the indicating and adjustment module is used, the parameter
"SIL"
must be actived in the menu level "Service".
The parameter adjustment of the interference current influen-
ces the safety-related characteristics. For safety-relevant
applications only the following interference currents are
permitted:
l
fail low = <3.6 mA (default value)
l
fail high = 22 mA
The damping of the output signal must be adapted to the
process safety time.
Measured value transmission via HART signal as well as
HART multidrop mode is not permitted.
The effectivity of the set parameters must be checked in a
suitable way.
l
After connecting the instrument, the output signal jumps to
the set interference current (at the end of the switch on
phase)
l
In mode "Simulation", the signal current can be simulated
independent of the actual level
To avoid unwanted or unauthorized modification, the set
parameters must be protected against unintentional access:
l
activate the password protection in the adjustment
software
l
Activate the PIN on the indicating and adjustment module
The access by means of HART handheld or similar is not
permitted.
Protecting against unintentional or unauthorized adjustment
can be done, e.g. by sealing the housing cover.
Caution:
After a reset of the values, all parameters must be checked or
readjusted.
Create a measurement loop
Reaction in case of failure
Damping of the output signal
Inadmissible modes
Inspection possibilities
Access locking
8
VEGAPULS series 60 - 4 … 20 mA/HART
Functional safety
31338
-EN
-070510