Pepperl+Fuchs KFD2-HLC-Ex1.D - Trip Point and Hysteresis

Date of issue 11/30/07 805639
31
HART Loop Converter KFD2-HLC-(Ex)1.D(.**)
Editing device data: Relay
The following illustration shows the exact switching characteristics of the HLC:
8.5.4 Trip point and hysteresis
Please remember the following when entering values for Trip point and Hysteresis:
• Both values must be entered as floating decimal numbers in the unit selected under Unit (see
section 8.1.4 and 8.2).
• The selected hysteresis must be > 1 % of the trip point to prevent the relay from vibrating.
energized
de-energized
Min. trip point
Min. + hysteresis
Max. - hysteresis
Max. trip point
energized
de-energized
energized
de-energized
energized
de-energized
Measured value
Time
Switching direction Max, switching mode Active:
Switching direction Max, switching mode Passive:
Switching direction Min, switching mode Active:
Switching direction Min, switching mode Passive: