Burkert Type 8186 - Manual (Page 20)

Current output
Characteristics 4 … 20 mA
20 … 4 mA
Failure mode 4 ) Hold value
20
.5 mA
22 mA
< 3 .6 mA
Min. current 5 ) 3 .8 mA
4 mA
Max. current 6 ) 20 mA
20 .5 mA
The values in bold font represent the data of the factory setting.
In HART multidrop mode, the current is constantly 4 mA. This value
does not change even in case of failure.
Current output
Output mode: 4-20 mA ▼
Failure mode: 22 mA ▼
Min. current 3.8 mA ▼
The functional safety is already activated Ex factory for instruments
with SIL qualification. For instruments Ex factory without SIL
qualification, the functional safety must be activated by the user for
applications according to SIL via the indicating and adjustment
module. The SIL factory setting cannot be deactivated by the user.
The activation of SIL has the following impact:
l In the menu item "Failure mode" under "Current output", the
parameters "Hold value" and "20.5 mA" are blocked
l In the menu item "HART mode", the function "Multidrop" is blocked
Note:
For such applications, it is absolutely necessary to take note of "Safety
Manual".
HART offers standard and multidrop mode.
The mode standard with the fixed address 0 means output of the
measured value as 4 … 20 mA signal.
4 ) Value of the current output in case of failure, e.g. if no valid measured value
is delivered.
5 ) This value is not underrun during operation.
6 ) This value is not exceeded during operation.
Service/Functional
safety (SIL)
Service/HART mode
20 Indicating and adjustment module
5 Setup - Sensors up to software 3.99
41787
-EN
-120316