Liquiphant FTL51B

Summary

Product identification

• Product name: Liquiphant FTL51B HART
• Type: Vibronic Point level switch for liquids
• Order code: (See nameplate or delivery note)
• Serial number: (See nameplate)
• Document version: Valid as of version 01.00.zz (Device firmware)
• Nameplate information: Includes manufacturer identification, order number, extended order code, serial number, technical data, degree of protection, firmware/hardware version, approval-related information, and DataMatrix code.
• Manufacturer: Endress+Hauser SE+Co. KG, Hauptstraße 1, 79689 Maulburg, Germany.

Storage and transport

• Storage temperature: –40 to +80 °C (–40 to +176 °F). Optional –50 °C (–58 °F) or –60 °C (–76 °F). With M12 plug, elbowed: –25 to +80 °C (–13 to +176 °F).
• Transport: Use original packaging. Hold by the housing, temperature spacer, flange, or extension pipe. Do not bend, shorten, or extend the tuning fork.

Mounting

• Orientation: Any orientation for short pipes (up to approx. 500 mm / 19.7 in). Vertical from above for long pipes.
• Clearance: Minimum distance between fork tip and tank/pipe wall: 10 mm (0.39 in).
• Viscosity:
  • Low viscosity (< 2,000 mPa⋅s): Tuning fork can be within the installation socket.
  • High viscosity (≤ 10,000 mPa⋅s): Tuning fork must be outside the installation socket.
• Buildup: Use short installation sockets and maintain distance from expected buildup.
• Support: Required for severe dynamic loads. Maximum lateral loading capacity of pipe extensions and sensors: 75 Nm (55 lbf ft). For marine approval, support is needed at least every 1,600 mm for extensions/sensors longer than 1,600 mm.
• Weld-in adapter: Leakage hole must point downwards.

Installation

• Tools: Open-ended wrench, Allen key.
• Alignment: Use markings on the hexagonal nut or weld-in adapter, or the II symbol on the flange/Tri-Clamp.
• Pipes: Suitable for flow velocity up to 5 m/s with 1 mPa⋅s viscosity and 1 g/cm³ density.
• Screwing in: Turn only by the hex bolt; 15 to 30 Nm (11 to 22 lbf ft). Do not turn the housing.
• Cable entry alignment: Housing can be rotated up to 380° by loosening the securing screw (max 1.5 turns).
• Housing cover: Do not lubricate the thread; it is coated with lubricant varnish.
• Display module rotation: Switch off supply voltage before rotating. Can be rotated up to 4 × 90° in each direction.

Electrical connection

• Tools: Screwdriver, Allen key.
• Cover screw: For hazardous area devices, ensure correct positioning of the securing screw.
• Potential equalization: Connect to the outer ground terminal if necessary. Keep the line short; minimum cross-section 2.5 mm² (14 AWG).
• Supply voltage:
  • 10.5 to 35 VDC (non-Ex, Ex d, Ex e)
  • 10.5 to 30 VDC (Ex i)
• Terminals:
  • Supply voltage and internal ground: 0.5 to 2.5 mm² (20 to 14 AWG)
  • External ground: 0.5 to 4 mm² (20 to 12 AWG)
• Cable outer diameter:
  • Plastic entry: ⌀5 to 10 mm (0.2 to 0.38 in)
  • Nickel-plated brass entry: ⌀7 to 10.5 mm (0.28 to 0.41 in)
  • Stainless steel entry: ⌀7 to 12 mm (0.28 to 0.47 in)
• 4-20 mA HART: A 250 Ω HART communication resistor is required for low-impedance power supply. Maximum 6 V voltage drop across the resistor.
• Overvoltage protection:
  • Without optional protection: Meets IEC/DIN EN 61326-1, test level 1000 V line to earth. Overvoltage category II, pollution degree 2.
  • With optional protection: Spark-over voltage min. 400 VDC, nominal discharge current 10 kA.
• Wiring: Switch off supply voltage before connecting. Use specified cable glands for hazardous areas. Ensure cables are adequately insulated and temperature-stable.
• Terminal assignment:
  • Single compartment housing: Terminals 1 (+), 2 (-), 3 (internal ground).
  • Dual-compartment housing (L-shape): Terminals 1 (+), 2 (-), 3 (internal ground).
• Cable entries: Type depends on device version.
• M12 plug: Pin assignment: 1 (Signal +), 2 (Not assigned), 3 (Signal –), 4 (Ground).
• Degree of protection:
  • Housing: IP66/IP68 NEMA 4X/6P.
  • M12 plug (connected): IP66/67 NEMA Type 4X.
  • M12 plug (unconnected/open housing): IP20, NEMA Type 1.

Post-connection check

• Verify device and cables for damage.
• Check cable requirements, strain relief, and tightness of glands.
• Confirm supply voltage and terminal assignment.
• Ensure all housing covers are installed and tightened.

Operation options

• Methods: Operating keys/DIP switches on electronic insert, optical keys on display (optional), Bluetooth® wireless technology (optional) with Smartblue app or FieldXpert/DeviceCare, operating tool (FieldCare/DeviceCare, handheld terminal, AMS, PDM).
• Electronic insert:
  • Reset password key.
  • Device reset keys (as-delivered state).
  • Proof test wizard key (> 3 s).
  • DIP switch for safety function (MIN/MAX).
  • DIP switch for locking/unlocking.
• Safety function (DIP switch):
  • MAX: Output switches to demand mode when covered (e.g., overfill protection).
  • MIN: Output switches to demand mode when uncovered (e.g., dry run prevention).
  • DIP switch settings have priority.
• Function test (operating key): Press key for > 3 s. Output changes to demand state; returns to normal if internal test passes. Can also be initiated via digital interfaces.
• Operating menu structure: Local display for simple configuration; operating tools for advanced applications. Wizards guide users through configuration.
• User roles: Operator and Maintenance with different write access levels, protected by an access code.
• Local display (optional): Operates through cover. Displays measured values, faults, and notices. Backlighting changes color (green to red) on error. Available with Bluetooth® option.
• Bluetooth® wireless technology (optional): Requires device display with Bluetooth, smartphone/tablet with Smartblue app or PC with DeviceCare/FieldXpert. Range up to 25 m (82 ft). Operating keys on display locked when connected. Initial password is the device serial number.
• Operating tool access: Via HART (e.g., Commubox FXA195) or CDI connection (Commubox FXA291).
• HistoROM data management: Stores data and device serial number. Transfers data when replacing electronic insert.

System integration

• Manufacturer ID: 17 (0x11)
• Device type code: 0x11C4
• Device revision: 1
• HART specification: 7
• DD revision: 1
• HART load: Minimum 250 Ω.
• Measured variables via HART:
  • Primary variable (PV): Level limit detection (initial state depends on fork state and safety function).
  • Secondary variable (SV): Sensor frequency (oscillation frequency).
  • Tertiary variable (TV): Fork state (covered/uncovered).
  • Quaternary variable (QV): Sensor temperature.
• Device variables codes: Level limit detection (0), Sensor frequency (1), Fork state (2), Sensor temperature (3), Terminal current (5), Terminal voltage (6).
• System units: Oscillation frequency in Hz. Temperature in °C, °F, or K.

Commissioning

• Preliminaries: Ensure correct current output settings to prevent overflow or dry running. Reconfigure range settings (LRV/URV) after changing current output settings.
• As-delivered state (default settings):
  • Assign PV: Level limit detection (8/16 mA mode).
  • Safety mode: MAX.
  • Alarm condition: Min. 3.6 mA.
  • DIP switch for locking: OFF.
  • Bluetooth: ON.
  • Density range: > 0.7 g/cm³.
  • Switching times: 0.5 s when fork is covered.

Technical data

Input

• Measured variable: Level limit detection.
• Measuring range: See official PDF for exact tabulated values.

Output

• Output signal: 4 to 20 mA HART.
• Signal on alarm: See official PDF for exact tabulated values.
• Load: See official PDF for exact tabulated values.
• Damping: See official PDF for exact tabulated values.
• Switch output: See official PDF for exact tabulated values.
• Protocol-specific data: See official PDF for exact tabulated values.
• Wireless HART data: See official PDF for exact tabulated values.
• Heartbeat Technology: See official PDF for exact tabulated values.

Environment

• Ambient temperature range: See official PDF for exact tabulated values.
• Storage temperature: –40 to +80 °C (–40 to +176 °F).
• Humidity: See official PDF for exact tabulated values.
• Operating height: See official PDF for exact tabulated values.
• Climate class: See official PDF for exact tabulated values.
• Degree of protection: IP66/IP68 (NEMA 4X/6P).
• Vibration resistance: See official PDF for exact tabulated values.
• Shock resistance: See official PDF for exact tabulated values.
• Mechanical load: See official PDF for exact tabulated values.
• Pollution degree: 2.
• Electromagnetic compatibility (EMC): See official PDF for exact tabulated values.

Process

• Process temperature range: See official PDF for exact tabulated values.
• Thermal shock: See official PDF for exact tabulated values.
• Process pressure range: See official PDF for exact tabulated values.
• Overpressure limit: See official PDF for exact tabulated values.
• State of aggregation: Liquids.
• Medium density: See official PDF for exact tabulated values.
• Viscosity:
  • Low viscosity: < 2,000 mPa⋅s
  • High viscosity: ≤ 10,000 mPa⋅s
• Pressure tightness: See official PDF for exact tabulated values.
• Solids contents: See official PDF for exact tabulated values.

Disclaimer: This extraction may miss figures, footnotes, or revisions. Contractual data must match the OEM PDF revision used on the project.

Official datasheet (PDF)

Lenntech datasheet mirror