KROHNE OPTIFLEX 2200C SIL - Manual (Page 12)

6
SPECIFICATION OF SAFETY FUNCTION
12
OPTIFLEX 2200 C
www.krohne.com 01/2013 - 4000738603 - AD SIL OPTIFLEX 2200 R03 en
6.2.3 Safety function characteristics
The safety function uses only a 4...20 mA analog output signal to measure the level and give the
device status. The analog output signal has an accuracy of ±2.5%.
If the device finds a fault:
If a logic solver is used, it must use low error alarm signals (current input ≤ 3.6 mA ) to set itself
to a fail-safe condition.
WARNING!
The device must have the applicable options and settings for the application. The ambient and
process conditions must agree with the technical data given in the handbook (document [N1])
and this document (safety manual). You must obey the installation instructions given in the
handbook (document [N1]).
CAUTION!
We recommend that the 4 and 20 mA limits of the measuring range are not in the top or bottom
dead zones and the non-linearity zones.
For more data about the dead zones, refer to the "Technical Data" chapter in the handbook
(document [N1]).
Function input Function input Function input Function input None
Function output Function output Function output Function output 4…20 mA
Error signal Error signal Error signal Error signal ≤ 3.6 mA