Liquiphant FTL64
6 Endress+Hauser
Output
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 direct current 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 to order
Low-temperature electronic inserts are marked LT
Universal current connection, relay output (FEL64)
• Switches the loads via 2 floating change-over contacts
• Ambient temperature –60 °C (–76 °F), optionally available to 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 to 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 –50 °C (–58 °F), optionally available to 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 –50 °C (–58 °F), optionally available to order
Low-temperature electronic inserts are marked LT
Output signal Switch output
The following default switching delay times can be ordered for electronic inserts FEL61, FEL62,
FEL64, FEL64DC, FEL67 and FEL68:
• 0.5 s when the tuning fork is covered and 1.0 s when it is uncovered (factory setting)
• 0.25 s when the tuning fork is covered and 0.25 s when it is uncovered (fastest configuration)
• 1.5 s when the tuning fork is covered and 1.5 s when it is uncovered
• 5.0 s when the tuning fork is covered and 5.0 s when it is uncovered
COM interface
For connecting to modules VU120 or VU121 (no modifying effect)
Bluetooth® wireless technology (optional)
The device has a Bluetooth® wireless technology interface. Device data and diagnostic data can be
read out using the free "SmartBlue" app.
Ex connection data
See safety instructions (XA): All data relating to explosion protection are provided in separate Ex
documentation and are available from the Downloads Area of the Endress+Hauser-website. The Ex
documentation is supplied as standard with all Ex devices.
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