Endress+Hauser HMX50 - Page 38

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Endress+Hauser
HART Loop Converter HMX50
• When the value of the trip point is out of range (exceeded or not reached) for a period of
time longer than the delay time, the relay switches.
• When the value of the trip point ± hysteresis is in range (not reached or exceeded) for a
period of time longer than the delay time, the relay switches back.
• Shorter overranges/underranges do not have an effect.
The following illustration shows an example of switching characteristics with response
delay:
A0034633
A Max. trip point
BMax - hysteresis
C Switching direction MAX, switching mode Active, with delay
1 Measured value
2energized
3 de-energized
t
1
A
B
C
2
3
BA00371FEN_1417.fm Page 38 Tuesday, August 15, 2017 4:08 PM