Levelflex FMP55
16 Endress+Hauser
Switch output
Function Open collector switching output
Switching behavior Binary (conductive or non-conductive), switches when the programmable switch
point is reached
Failure mode non-conductive
Electrical connection
values
U = 16 to 35 V
DC
, I = 0 to 40 mA
Internal resistance R
I
< 880 Ω
The voltage drop at this internal resistance has to be taken into account on
planning the configuration. For example, the resulting voltage at a connected relay
must be sufficient to switch the relay.
Insulation voltage floating, Insulation voltage 1 350 V
DC
to power supply aund 500 V
AC
to ground
Switch point freely programmable, separately for switch-on and switch-off point
Switching delay freely programmable from 0 to 100 s, separately for switch-on and switch-off
point
Number of switching
cycles
corresponds to the measuring cycle
Signal source
device variables
• Level linearized
• Distance
• Terminal voltage
• Electronic temperature
• Relative echo amplitude
• Interface linearized
1)
• Interface distance
1)
• Upper interface thickness
1)
• Relative interface amplitude
1)
• Diagnostic values, Advanced diagnostics
Number of switching
cycles
unlimited
1) only if an interface measurement is active
Signal on alarm
Depending on the interface, failure information is displayed as follows:
• Current output (for HART devices)
– Failsafe mode selectable (in accordance with NAMUR Recommendation NE 43):
Minimum alarm: 3.6 mA
Maximum alarm (= factory setting): 22 mA
– Failsafe mode with user-selectable value: 3.59 to 22.5 mA
• Local display
– Status signal (in accordance with NAMUR Recommendation NE 107)
– Plain text display
• Operating tool via digital communication or service interface (CDI)
– Status signal (in accordance with NAMUR Recommendation NE 107)
– Plain text display
Linearization
The linearization function of the device allows the conversion of the measured value into any unit of
length or volume. Linearization tables for calculating the volume in cylindrical tanks are pre-
programmed. Other tables of up to 32 value pairs can be entered manually or semi-automatically.
Galvanic isolation
All circuits for the outputs are galvanically isolated from each other.
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