Technical data Liquiphant FTL51B
52 Endress+Hauser
14 Technical data
14.1 Input
14.1.1 Measured variable
Level (point level), MAX or MIN safety
14.1.2 Measuring range
Depends on the installation location and the pipe extension ordered
Maximum sensor length 6 m (20 ft)
14.2 Output
14.2.1 Output and input variants
Electronic inserts
2-wire AC (FEL61)
• Two-wire AC version
• Switches the load directly into the power supply circuit via an electronic switch.
3-wire DC-PNP (FEL62)
• Three-wire DC version
• Switches the load via the transistor (PNP) and separate connection, e. g. in conjunction
with programmable logical controllers (PLC)
• Ambient temperature –60 °C (–76 °F), optionally available for order
Low-temperature electronic inserts are marked LT.
Universal current connection, relay output (FEL64)
• Switches the loads via 2 potential-free changeover contacts
• Ambient temperature –60 °C (–76 °F), optionally available for order
Low-temperature electronic inserts are marked LT.
Direct current connection, relay output (FEL64DC)
• Switches the load via 2 potential-free changeover contacts
• Ambient temperature –60 °C (–76 °F), optionally available for order
Low-temperature electronic inserts are marked LT.
PFM output (FEL67)
• For separate switching device (Nivotester FTL325P, FTL375P)
• PFM signal transmission; current pulses are superimposed on the power supply along
the two-wire cabling
• Ambient temperature –52 °C (–62 °F), optionally available for order
The low-temperature electronic inserts are marked LT
2-wire NAMUR > 2.2 mA/< 1.0 mA (FEL68)
• For separate switching device, e. g. Nivotester FTL325N
• Signal transmission H-L edge 2.2 to 3.8/0.4 to 1.0 mA as per IEC 60917-5-6 (NAMUR)
on two-wire cable
• Ambient temperature –52 °C (–62 °F), optionally available for order
Low-temperature electronic inserts are marked LT.
2-wire density (FEL60D) for density measurement
Connection to Density Computer FML621
For more information, see the Technical Information for density measuring
technology.
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