Endress+Hauser Liquiphant FTL31 - Input; Measured Variable; Measuring Range; Output

Liquiphant FTL31
Endress+Hauser 5
Input
Measured variable
Density
Measuring range
> 0.7 g/cm³ (optionally available: > 0.5 g/cm³)
Output
Switch output
Switching behavior: On/Off
Function
3-wire DC-PNP:
Positive voltage signal at the switch output of the electronics (PNP), switching capacity 200 mA
2-wire AC/DC:
Load switching in the power supply line, switching capacity 250 mA
Operating modes
The device has two operating modes: maximum safety (MAX) and minimum safety (MIN).
By choosing the corresponding operating mode, the user ensures that the device also switches in a
safety-oriented manner even in an alarm condition, e.g. if the power supply line is disconnected.
• Maximum safety (MAX)
The device keeps the electronic switch closed as long as the liquid level is below the fork. Sample
application: overfill prevention
• Minimum safety (MIN)
The device keeps the electronic switch closed as long as the fork is immersed in liquid. Sample
application: Dry running protection for pumps
The electronic switch opens if the limit is reached, if a fault occurs or the power fails (quiescent
current principle).
Power supply
Supply voltage
DC-PNP:
AC/DC:
10 to 30 V DC, 3-wire
20 to 253 V AC/DC, 2-wire
Power consumption
DC-PNP:
AC/DC:
< 975 mW
< 850 mW
Current consumption
DC-PNP:
AC/DC:
< 15 mA
< 3.8 mA
Residual ripple
DC-PNP:
AC/DC:
5 Vss 0 to 400 Hz
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