Endress+Hauser Liquiphant FTL51B User manual

Products Solutions Services
Operating Instructions
Liquiphant FTL51B
Vibronic
Point level switch for all kinds of liquids
BA01894F/00/EN/01.19
71442036
2019-04-01
Valid as of version
01.00.zz

Liquiphant FTL51B
2 Endress+Hauser
Order code:
Ext. ord. cd.:
Ser. no.:
www.endress.com/deviceviewer Endress+Hauser
Operations App
XXXXXXXXXXXX
XXXXX-XXXXXX
XXX.XXXX.XX
Serial number
1.
3.
2.
A0023555

Liquiphant FTL51B Table of contents
Endress+Hauser 3
Table of contents
1 About this document ................ 5
1.1 Symbols used ......................... 5
1.1.1 Safety symbols .................. 5
1.1.2 Electrical symbols ................ 5
1.1.3 Communication specific symbols ..... 5
1.1.4 Symbols for certain types of
information .................... 5
1.1.5 Symbols in graphics ............... 6
2 Basic safety instructions ............ 7
2.1 Requirements for the personnel ............ 7
2.2 Designated use ........................ 7
2.2.1 Incorrect use .................... 7
2.3 Workplace safety ....................... 7
2.4 Operational safety ...................... 7
2.5 Product safety ......................... 8
2.6 IT security ............................ 8
3 Product description ................. 9
3.1 Product design ........................ 9
4 Incoming acceptance and product
identification ..................... 10
4.1 Incoming acceptance ................... 10
4.2 Product identification ................... 10
4.2.1 Nameplate .................... 10
4.2.2 Manufacturer address ............ 10
4.3 Storage and transport .................. 11
4.3.1 Storage conditions ............... 11
4.3.2 Handling of the device ............ 11
5 Installation ....................... 12
5.1 Installation conditions .................. 12
5.1.1 Switch point ................... 12
5.1.2 Take viscosity into consideration .... 12
5.1.3 Avoid buildup .................. 13
5.1.4 Take clearance into consideration ... 14
5.1.5 Support the device ............... 14
5.1.6 Leakage hole ................... 14
5.2 Mounting the measuring device ........... 15
5.2.1 Required tools .................. 15
5.2.2 Installation .................... 15
5.3 Sliding sleeves ....................... 17
5.4 Post-installation check .................. 17
6 Electrical connection .............. 18
6.1 Connection conditions .................. 18
6.1.1 PE connection .................. 19
6.2 Connecting the measuring device .......... 19
6.2.1 2-wire AC (electronic insert
FEL61) ....................... 19
6.2.2 3-wire DC-PNP (electronic insert
FEL62) ....................... 22
6.2.3 Universal current connection with
relay output (electronic insert
FEL64) ....................... 24
6.2.4 DC connection, relay output
(electronic insert FEL64 DC) ....... 26
6.2.5 PFM output (electronic insert
FEL67) ....................... 28
6.2.6 2-wire NAMUR > 2.2 mA/< 1.0 mA
(electronic insert FEL68) .......... 31
6.2.7 2-wire density (electronic insert
FEL60D) for density measurement ... 32
6.2.8 LED module ................... 35
6.2.9 Bluetooth module ............... 35
6.2.10 Relay output ................... 36
6.2.11 Cable entry .................... 36
6.3 Special connection instructions ........... 36
6.4 Hardware settings ..................... 36
6.5 Ensuring the degree of protection ......... 36
6.6 Post-connection check .................. 36
7 Operation options ................. 37
7.1 Overview of operation options ............ 37
7.1.1 Operating concept .............. 37
7.1.2 Operation at electronic insert ....... 37
7.1.3 Diagnostics and verification with
Bluetooth® wireless technology ..... 40
7.2 LED module (optional) .................. 40
7.2.1 LED indicator .................. 41
8 Commissioning .................... 41
8.1 Function check ....................... 41
8.2 Switching on the measuring device ......... 41
8.3 Configuring the measuring device ......... 41
8.3.1 SmartBlue (app) ................ 41
8.4 Advanced settings ..................... 42
8.5 Configuration management .............. 42
8.6 Simulation .......................... 42
8.6.1 Functional test of the electronic
switch with a test magnet ......... 42
8.6.2 Functional test using the button on
the electronic insert .............. 43
8.7 Protecting settings from unauthorized
access .............................. 44
8.8 Bluetooth parameters for Heartbeat ........ 44
8.9 Verification wizard for proof testing ........ 44
9 Operation ......................... 45
9.1 Overview of the diagnostics menu ......... 45
10 Diagnostics and troubleshooting ... 46
10.1 General troubleshooting ................ 46

Table of contents Liquiphant FTL51B
4 Endress+Hauser
10.2 Diagnostic information via light emitting
diodes .............................. 46
10.3 Diagnostic information on local display ..... 47
10.4 Diagnostic information via the
communication interface ................ 47
10.5 Adapting the diagnostic information ....... 47
10.6 Overview of diagnostic information ........ 47
10.7 Pending diagnostic messages ............ 47
10.8 Diagnostic list ........................ 47
10.9 Event logbook ........................ 47
10.10 Resetting the measuring device ........... 47
10.11 Device information .................... 47
10.12 Firmware history ..................... 47
11 Maintenance ...................... 48
11.1 Maintenance tasks .................... 48
11.1.1 Cleaning ...................... 48
12 Repair ............................ 49
12.1 General information ................... 49
12.1.1 Repair concept ................. 49
12.1.2 Repair of Ex-certified devices ....... 49
12.2 Spare parts .......................... 49
12.3 Return .............................. 49
12.4 Disposal ............................ 49
13 Accessories ....................... 50
13.1 Device-specific accessories ............... 50
13.1.1 Test magnet ................... 50
13.1.2 Weather protection cover for single-
compartment housing ............ 50
13.1.3 Weather protection cover for dual-
compartment housing ............ 50
13.1.4 M12 connecting cable ............ 51
13.1.5 Bluetooth module ............... 51
13.1.6 LED module ................... 51
13.2 Sliding sleeves for unpressurized operation ... 51
13.3 High pressure sliding sleeves ............. 52
13.4 Communication-specific accessories ........ 53
13.5 Service-specific accessories .............. 53
13.6 System components ................... 53
14 Technical data .................... 54
14.1 Input ............................... 54
14.1.1 Measured variable .............. 54
14.1.2 Measuring range ............... 54
14.1.3 Density ....................... 54
14.1.4 Type of input .................. 54
14.2 Output ............................. 54
14.2.1 Output and input variants ......... 54
14.2.2 Output signal .................. 55
14.2.3 Signal on alarm ................ 56
14.2.4 Ex connection data .............. 56
14.3 Environment ......................... 56
14.3.1 Ambient temperature range ....... 56
14.3.2 Storage temperature ............. 57
14.3.3 Humidity ..................... 57
14.3.4 Operating altitude ............... 57
14.3.5 Climate class .................. 57
14.3.6 Degree of protection ............. 57
14.3.7 Vibration resistance ............. 58
14.3.8 Shock resistance ................ 58
14.3.9 Shock resistance ................ 58
14.3.10 Mechanical load ................ 58
14.3.11 Electromagnetic compatibility ...... 58
14.4 Process ............................. 58
14.4.1 Process temperature range ........ 58
14.4.2 Thermal shock ................. 58
14.4.3 Process pressure range ........... 59
14.4.4 Test pressure .................. 59
14.4.5 Density of the process medium ..... 60
14.4.6 Pressure tightness .............. 60
14.5 Additional technical data ................ 60
Index .................................. 61

Liquiphant FTL51B About this document
Endress+Hauser 5
1 About this document
1.1 Symbols used
1.1.1 Safety symbols
DANGER
This symbol alerts you to a dangerous situation. Failure to avoid this situation will result in
serious or fatal injury.
WARNING
This symbol alerts you to a dangerous situation. Failure to avoid this situation can result in
serious or fatal injury.
CAUTION
This symbol alerts you to a dangerous situation. Failure to avoid this situation can result in
minor or medium injury.
NOTICE
This symbol contains information on procedures and other facts which do not result in
personal injury.
1.1.2 Electrical symbols
Direct current
Alternating current
Direct current and alternating current
Ground connection
A grounded terminal which, as far as the operator is concerned, is grounded via a
grounding system.
Protective earth (PE)
Ground terminals that must be connected to ground prior to establishing any other
connections.
The ground terminals are located on the interior and exterior of the device:
• Interior ground terminal: protective earth is connected to the mains supply.
• Exterior ground terminal: device is connected to the plant grounding system.
1.1.3 Communication specific symbols
1.1.4 Symbols for certain types of information
Permitted
Procedures, processes or actions that are permitted.
Forbidden

About this document Liquiphant FTL51B
6 Endress+Hauser
Procedures, processes or actions that are forbidden.
Tip
Indicates additional information.
Reference to documentation
1.
,
2.
,
3.
…
Series of steps
Result of a step
1.1.5 Symbols in graphics
Symbol Meaning
1, 2, 3 ... Item numbers
1.
,
2.
,
3.
… Series of steps
A, B, C, ... Views
A-A, B-B, C-C, ... Sections
-
Hazardous area
Indicates the hazardous area.
.
Safe area (non-hazardous area)
Indicates the non-hazardous area.

Liquiphant FTL51B Basic safety instructions
Endress+Hauser 7
2 Basic safety instructions
2.1 Requirements for the personnel
The personnel for installation, commissioning, diagnostics and maintenance must fulfill
the following requirements:
‣Trained, qualified specialists must have a relevant qualification for this specific function
and task.
‣Are authorized by the plant owner/operator.
‣Are familiar with federal/national regulations.
‣Before starting work, read and understand the instructions in the manual and
supplementary documentation as well as the certificates (depending on the
application).
‣Follow instructions and comply with basic conditions.
The operating personnel must fulfill the following requirements:
‣Are instructed and authorized according to the requirements of the task by the facility's
owner-operator.
‣Follow the instructions in this manual.
2.2 Designated use
The measuring device described in this manual may be used only as a point level switch for
liquids. Incorrect use may pose a hazard. Ensure that the measuring device is in perfect
condition while it is in operation.
• Use the measuring devices only for media to which the process-wetted materials are
adequately resistant.
•Do not exceed or drop below the limit values for the measuring device  see
TI01403F/00/EN.
2.2.1 Incorrect use
The manufacturer is not liable for damage caused by improper or non-designated use.
Residual risks
Due to heat transfer from the process, the temperature of the electronics housing and the
assemblies contained therein may rise to 80 °C (176 °F) during operation.
Danger of burns from contact with surfaces!
‣In the event of elevated fluid temperatures, ensure protection against contact to
prevent burns.
Pay attention to the separate SIL documentation SD0xxxxF for functional safety
requirements as per IEC 61508 .
2.3 Workplace safety
For work on and with the device:
‣Wear the required personal protective equipment according to federal/national
regulations.
2.4 Operational safety
Risk of injury.
‣Operate the device in proper technical condition and fail-safe condition only.

Basic safety instructions Liquiphant FTL51B
8 Endress+Hauser
‣The operator is responsible for interference-free operation of the device.
Conversions to the device
Unauthorized modifications to the device are not permitted and can lead to unforeseeable
dangers.
‣If, despite this, modifications are required, consult with Endress+Hauser.
Repair
To ensure continued operational safety and reliability,
‣Carry out repairs on the device only if they are expressly permitted.
‣Observe federal/national regulations pertaining to repair of an electrical device.
‣Use original spare parts and accessories from Endress+Hauser only.
2.5 Product safety
This measuring device is designed in accordance with good engineering practice to meet
state-of-the-art safety requirements, has been tested, and left the factory in a condition in
which it is safe to operate.
It meets general safety standards and legal requirements. It also complies with the EC
directives listed in the device-specific EC Declaration of Conformity. Endress+Hauser
confirms this by affixing the CE mark to the device.
2.6 IT security

Liquiphant FTL51B Product description
Endress+Hauser 9
3 Product description
Point level switch for MIN/MAX safety mode and density measurement
3.1 Product design
1
2
345
A0036953
1 Housing with cover, electronic insert and optional Bluetooth module or LED module
2 Optional spacer (temperature spacer or pressure-tight feedthrough (second line of defense))
3 Compact version
4 Pipe extension
5 Short pipe
Identify the electronic insert via the order code on the nameplate →  10.

Incoming acceptance and product identification Liquiphant FTL51B
10 Endress+Hauser
4 Incoming acceptance and product
identification
4.1 Incoming acceptance
mAre the order codes on the delivery note and the product sticker identical?
mAre the goods undamaged?
mDo the nameplate data match the ordering information on the delivery note?
mIf required (see nameplate): Are the safety instructions (XA) provided?
mIs the device properly secured?
If one of these conditions is not satisfied, contact your Endress+Hauser Sales Center.
4.2 Product identification
The measuring device can be identified in the following ways:
• Nameplate data
• Order code with breakdown of the device features on the delivery note
• Enter serial number from nameplates in W@M Device Viewer
(www.endress.com/deviceviewer): All information on the measuring device is displayed
The serial number on the nameplate can also be used to obtain an overview of the
technical documentation supplied with the device in W@MDevice Viewer
(www.endress.com/deviceviewer)
4.2.1 Nameplate
3
5
Order code: Ser. no.:
Ext. ord. cd.:
L:
FW:
Dev.Rev.:
Pmax:
0.83 W PNP
1 2
4
4
A0038187
1 Manufacturer name and device name
2 Manufacturer address
3 Order code
4 Technical data
5 Approval-specific information
4.2.2 Manufacturer address
Endress+Hauser SE+Co. KG
Hauptstraße 1
79689 Maulburg, Germany
Address of the manufacturing plant: See nameplate.

Liquiphant FTL51B Incoming acceptance and product identification
Endress+Hauser 11
4.3 Storage and transport
4.3.1 Storage conditions
Use original packaging.
Storage temperature
–40 to +80 °C (–40 to +176 °F)
4.3.2 Handling of the device
A0034846
• Transport the device to the measuring point in the
original packaging.
• Hold the device by the housing, temperature spacer,
flange or extension pipe.
A0034847
Do not bend, shorten or extend the tuning fork.

Installation Liquiphant FTL51B
12 Endress+Hauser
5 Installation
The device can be installed in any position in a vessel, pipe or tank.
1
A0037879
1 Temperature spacer for tank with insulation and/or high process temperatures.
5.1 Installation conditions
5.1.1 Switch point
Typical switch points, depending on the orientation of the point level switch (water
+25 °C (+77 °F), 1 bar (14.5 psi).
~13 (0.5)
D
A B C
~4 (0.16)
~12.5 (0.49)
D
D
A0037915
A Installation from above
B Installation from below
C Installation from the side
D Switch point
5.1.2 Take viscosity into consideration
Low viscosity
Low viscosity (< 2 000 mPa·s), e.g. water. The tuning fork can be located in the
installation socket.

Liquiphant FTL51B Installation
Endress+Hauser 13
min. 25 (min. 1)
DD
A0033297
D Installation socket diameter: at least 50 mm (2.0 in)
High viscosity
min. 40 (min. 1.6)
A0037348
High viscosity (< 10 000 mPa·s), e.g. honey. The tuning fork must be located outside the
installation socket!
NOTICE
High-viscosity liquids can cause switching delays.
‣Make sure that the liquid can easily run off the tuning fork.
5.1.3 Avoid buildup
1
A0033239
1 Highly viscous medium

Installation Liquiphant FTL51B
14 Endress+Hauser
• Make sure there is sufficient distance between the tuning fork and vessel wall. There
should be no contact between buildup on the vessel and buildup on the tuning fork.
• The tuning fork must be able to project freely into the vessel. Use short installation
sockets.
• A vertical orientation of the point level switch keeps buildup or deposits to a minimum.
• Preferably flush-mounted on vessels or in pipes.
5.1.4 Take clearance into consideration
Make sure there is sufficient space outside the tank for mounting, connection and settings
at the electronic insert.
A0033236
5.1.5 Support the device
Support the device in the event of severe dynamic load. Maximum lateral loading capacity
of the pipe extensions and sensors: 75 Nm (55 lbf ft).
A0031874
5.1.6 Leakage hole
Weld-in or process adapter with leakage hole: if the device is installed horizontally, ensure
that the leakage hole is pointing down so that leaks can be detected as quickly as possible.

Liquiphant FTL51B Installation
Endress+Hauser 15
5.2 Mounting the measuring device
5.2.1 Required tools
Open-ended wrench or socket wrench 32 AF (socket wrench can be ordered as an
accessory →  50)
5.2.2 Installation
Horizontal installation in vessels
Use the marking to align the tuning fork in such a way that medium can run off easily and
deposit buildup is avoided.
The following types of marking are possible:
• As material specification (e.g. 316L) or as a thread designation (e.g. G ½")
• On the hexagonal bolt of the process adapter
• On the weld-in adapter
• Marking (II) on the back of the flange
Correct alignment
<-1.4435
G1
316L
15°
±
<-1.4435
A0034850
Incorrect alignment
<-1.4435
G1
316L
A0037344
Installation in pipes
Correct alignment
A0034851
Flow velocity up to 5 m/s with viscosity 1 mm2/s (cSt) and density 1 g/cm3 (SGU). Check
the function in the event of other process medium conditions.

Installation Liquiphant FTL51B
16 Endress+Hauser
The marking on the adapter points in the flow direction.
Use the marking to align the tuning fork in such a way that the flow is not significantly
obstructed. The marking can also be recognized when the device is installed, see the "Fork
position marking" section .
Incorrect alignment
A0037345
The marking on the adapter does not point in the flow direction.
Screwing in the device
A0034852
Turn by the hex bolt only.
15 to 30 Nm (11 to 22 lbf ft)
A0037346
Do not turn at the housing!

Liquiphant FTL51B Installation
Endress+Hauser 17
Aligning the cable entry
3...4 x
0.7 Nm
1. 2.
1 1
A0031876
Housing with internal locking
screw
0.7 Nm
1. 2.
3 3
A0037347
Housing with external locking
screw
5.3 Sliding sleeves
See the "Accessories" section →  50
5.4 Post-installation check
mIs the device undamaged (visual inspection)?
m
Does the device comply with the measuring point specifications?
For example:
• Process temperature
• Process pressure
• Ambient temperature range
• Switch point
mAre the measuring point identification and labeling correct (visual inspection)?
mIs the device adequately protected from wet conditions and direct sunlight?
mIs the device properly secured?

Electrical connection Liquiphant FTL51B
18 Endress+Hauser
6 Electrical connection
6.1 Connection conditions
LWARNING
Supply voltage might be connected!
Risk of electric shock and/or explosion!
‣Ensure that no uncontrolled processes are activated in the system.
‣Switch off the supply voltage before connecting the device.
‣When using the measuring device in hazardous areas, installation must comply with
the corresponding national standards and regulations and the Safety Instructions or
Installation or Control Drawings.
‣In accordance with IEC/EN61010 a separate circuit breaker must be provided for the
device.
‣Devices with integrated overvoltage protection must be grounded.
‣Protective circuits against reverse polarity, HF influences and overvoltage peaks are
integrated.
Connect the device in the following order:
1. Check that the supply voltage corresponds to the supply voltage indicated on the
nameplate.
2. Switch off the supply voltage before connecting the device.
3. Remove the housing cover.
4. Guide cable through the gland. Preferably use a twisted, shielded two-wire cable.
5. Connect the device in accordance with the following diagram.
6. Screw down housing cover.
7. Switch on supply voltage.
Electronic insert Description Option 1)
2-wire AC (FEL61)
Two-wire AC version
Switches the load directly into the power supply circuit via an electronic switch.
→  19 A1
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 logic controllers (PLC), DI modules as per EN 61131-2.
→  22 A2 2)
Universal current connection, relay output (FEL64)
Universal current version with relay output
Switches the loads via 2 potential-free changeover contacts.
→  24 A4 2)
Direct current connection, relay output (FEL64DC)
Switches the load via 2 potential-free changeover contacts
→  26 A3 2)
PFM output (FEL67)
For separate switching unit
PFM signal transmission; current pulses are superimposed on the power supply along
the two-wire cabling.
→  28 A7 3)

Liquiphant FTL51B Electrical connection
Endress+Hauser 19
Electronic insert Description Option 1)
2-wire NAMUR > 2.2 mA/< 1.0 mA (FEL68)
For separate switching unit
Signal transmission H-L edge 2.2 to 3.8 / 0.4 to 1.0 mA as per EN 50227 (NAMUR)
on two-wire cabling.
→  31 A8 3)
2-wire density (FEL60D) for density measurement →  32 GA
1) Ordering information: Product Configurator, order code for "Output"
2) Ambient temperature –60 °C (–76 °F) optionally available for order. The low-temperature electronic
inserts are marked LT.
3) Ambient temperature –52 °C (–62 °F) optionally available for order. The low-temperature electronic
inserts are marked LT.
6.1.1 PE connection
The device's PE connection only needs to be connected if the operating voltage of the
device is ≥ 35 V DC or ≥ 16 V AC eff.
When the device is used in hazardous areas, it must always be included in the potential
equalization of the system, irrespective of the operating voltage.
6.2 Connecting the measuring device
6.2.1 2-wire AC (electronic insert FEL61)
• Two-wire AC version
• Switches the load directly into the power supply circuit via an electronic switch. Always
connect in series with a load.
• Functional testing without level change. Functional testing of the entire device can be
performed using the test button on the electronic insert or with the test magnet with the
housing closed.
Supply voltage
19 to 253 VAC
Residual voltage when switched through: maximum 12 V
In accordance with IEC/EN61010 a separate circuit breaker must be provided for the
device.
Power consumption
< 1W
Current consumption
Residual current in the blocked state: maximum 3.8 mA
The red LED flashes in the event of an overload or short-circuit. Check for an overload or
short-circuit every 5 seconds. The test is deactivated after 60 seconds.
Load current
Maximum 89 VA / 253 V (350 mA); maximum 8.4 VA / 24 V (350 mA)
Minimum 2.5 VA / 253 V (10 mA); minimum 0.5 VA / 24 V (20 mA)
With overload and short-circuit protection.

Electrical connection Liquiphant FTL51B
20 Endress+Hauser
Output signal status
• OK status: load on (switched through)
• Demand mode: load off (blocked)
• Alarm: load off (blocked)
Terminal assignment
NOTICE
Device can be damaged.
‣External load K must always be connected! The electronic insert has an integrated
short-circuit connection.
!
>0,5
COM
NL1
1
2
MIN
MAX >0,7
U 19...253 V AC
I max: 350 mA
~
~
1 A
L1 NPE
K
1 2
A0036060
Behavior of the switch output and signalling
MAX
RD YE GN
MIN
K
K
K
K
K
(N)
(N)
(N)
(N)
(N)
IL
IL
<3.8 mA
<3.8 mA
<3.8 mA
2
2
2
2
2
1
1
1
1
1
L1
L1
L1
L1
L1
ΔU
ΔU
A0031901
The red LED flashes in the event of an overload or short-circuit. The red LED is lit
permanently (steady red) in the event of an alarm.