See also
Certificates (Page 248)
10.1.4 Operating modes of the device
The device can be operated as follows:
● "Functional Safety disabled" is used for operation in non-safety-related applications.
● "Functional Safety enabled" is used for operation in safety-related applications.
See also
Enabling Functional Safety (Page 160)
10.1.5 Device mode
When Functional Safety is disabled, the following device modes are displayed via the display
or remote operation:
Device mode Description Current output value Safe current output
Functional Safety disa‐
bled
Used for operation in
non-safety-related ap‐
plications.
The safety-related pa‐
rameters of the device
are set.
Operating signal
(4 to 20 mA)
No
The safety-relevant pa‐
rameters and the fail-
safe behavior are vali‐
dated.
Out of service, non-safe
mode
The device is out of
service (e.g. a firmware
update is running)
Failure signal
(≤ 3.6 mA or ≥ 21 mA)
No
Functional Safety
10.1 Safety concept
SITRANS P320/P420 (mA/HART)
Operating Instructions, 06/2018, A5E44852162-AA 157
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