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Ensure the power to the level switch is off, and the lines to any other external power source are disconnected or not powered while wiring the level switch. Ensure the wiring is suitable for the electrical current and the insulation is suitable for the voltage, temperature, and environment.
power source are disconnected or not powered while wiring the level switch. Ensure the wiring is suitable for the electrical current and the insulation is suitable for the voltage, temperature, and environment.
The Liquiphant FTL31 is a point level switch for liquids and is used in tanks, vessels and pipes. It is used for overfill prevention or pump protection in cleaning and filter systems as well as in cooling and lubrication vessels, for instance.
Section 9 Publication 9-47 Issue 3 : 09/22 Section 9 Publication 9-47 Issue 3 : 09/22 Page 1 of 12 Endress + Hauser Liquiphant M FTL50 and FTL51 Level Switches
Power source directly to fixture - When you want to add a switch to a light that is "hot" at the fixture, you can run a new 3 wire cable from the fixture to a box containing the new switch. The black caries the "hot" to the switch, the red carries the hot back to the fixture.
• Relay contact switching can be checked by using a hand multimeter at the terminals or by observing the overfill protection elements (e.g. horn, adjuster). • During the recurrent test, all existing relay contacts must be tested.
The universal-voltage version of the level switch outputs a 'covered paddle' or 'uncovered paddle' status signal through DPDT relay contacts. See Wiring the universal voltage version for details.
