Endress+Hauser Liquiphant FTL51B User manual

Products Solutions Services
Operating Instructions
Liquiphant FTL51B
Vibronic
Limit switch for liquids
BA01894F/00/EN/02.19
71440978
2019-06-28
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 ............................. 5
1.1.1 Safety symbols .................. 5
1.1.2 Electrical symbols ................ 5
1.1.3 Symbols for certain types of
information .................... 5
1.1.4 Symbols in graphics ............... 5
2 Basic safety instructions ............ 6
2.1 Requirements for the personnel ............ 6
2.2 Designated use ........................ 6
2.2.1 Incorrect use .................... 6
2.3 Workplace safety ....................... 6
2.4 Operational safety ...................... 6
2.5 Product safety ......................... 7
2.6 IT security ............................ 7
3 Product description ................. 7
3.1 Product design ........................ 8
4 Incoming acceptance and product
identification ....................... 9
4.1 Incoming acceptance .................... 9
4.2 Product identification .................... 9
4.2.1 Nameplate ..................... 9
4.2.2 Manufacturer address ............. 9
4.3 Storage and transport .................. 10
4.3.1 Storage conditions ............... 10
4.3.2 Transporting the device ........... 10
5 Installation ....................... 11
5.1 Mounting conditions ................... 11
5.1.1 Taking the switch point into
consideration .................. 11
5.1.2 Take viscosity into consideration .... 12
5.1.3 Avoiding buildup ................ 13
5.1.4 Take clearance into consideration ... 13
5.1.5 Support the device ............... 14
5.1.6 Weld-in adapter with leakage hole .. 14
5.2 Mounting the measuring device ........... 14
5.2.1 Required tools .................. 14
5.2.2 Installation .................... 15
5.3 Sliding sleeves ....................... 16
5.4 Post-installation check .................. 16
6 Electrical connection .............. 17
6.1 Connection conditions .................. 17
6.1.1 Cover with securing screw ......... 17
6.1.2 Connecting protective earth (PE) .... 17
6.2 Connecting the measuring device .......... 17
6.2.1 2-wire AC (electronic insert
FEL61) ....................... 17
6.2.2 3-wire DC-PNP (electronic insert
FEL62) ....................... 19
6.2.3 Universal current connection with
relay output (electronic insert
FEL64) ....................... 21
6.2.4 DC connection, relay output
(electronic insert FEL64 DC) ....... 23
6.2.5 PFM output (electronic insert
FEL67) ....................... 25
6.2.6 2-wire NAMUR > 2.2 mA/< 1.0 mA
(electronic insert FEL68) .......... 27
6.2.7 Bluetooth module VU121
(optional) ..................... 29
6.2.8 LED module VU120 (optional) ...... 30
6.2.9 Cable entry .................... 30
6.3 Post-connection check .................. 31
7 Operation options ................. 32
7.1 Overview of operation options ............ 32
7.1.1 Operating concept .............. 32
7.1.2 Functional test using the button on
the electronic insert .............. 32
7.1.3 Functional test of the electronic
switch with a test magnet ......... 35
7.1.4 Heartbeat diagnostics and
verification with Bluetooth® wireless
technology .................... 36
7.2 LED module VU120 (optional) ............ 37
7.2.1 Configuration and sensor status ..... 37
8 Commissioning .................... 37
8.1 Function check ....................... 37
8.2 Switching on the measuring device ......... 38
8.3 Establishing a connection via SmartBlue
(app) .............................. 38
8.3.1 SmartBlue (app) ................ 38
9 Operation ......................... 40
9.1 Diagnostics menu ..................... 40
9.1.1 "Diagnostics" menu ............... 40
9.1.2 "Application" menu .............. 40
9.1.3 "System" menu .................. 41
9.2 Heartbeat Verification .................. 42
9.3 Recurrent testing for SIL/WHG (German
Water Resources Act) devices ............. 42
10 Diagnostics and troubleshooting ... 42
10.1 Diagnostic information via light emitting
diodes .............................. 43
10.1.1 LED at electronic insert ........... 43

Table of contents Liquiphant FTL51B
4 Endress+Hauser
10.1.2 SmartBlue ..................... 43
11 Maintenance ...................... 44
11.1 Maintenance tasks .................... 44
11.1.1 Cleaning ...................... 44
12 Repair ............................ 45
12.1 General information ................... 45
12.1.1 Repair concept ................. 45
12.1.2 Repair of Ex-certified devices ....... 45
12.2 Spare parts .......................... 45
12.3 Return .............................. 45
12.4 Disposal ............................ 46
13 Accessories ....................... 47
13.1 Device-specific accessories ............... 47
13.1.1 Test magnet ................... 47
13.1.2 Weather protection cover for dual-
compartment housing, aluminum ... 47
13.1.3 Weather protection cover for single-
compartment housing, metal ....... 47
13.1.4 Plug-in jack .................... 48
13.1.5 Additional modules .............. 48
13.1.6 Sliding sleeves for unpressurized
operation ..................... 49
13.1.7 High pressure sliding sleeves ....... 50
14 Technical data .................... 52
14.1 Input ............................... 52
14.1.1 Measured variable .............. 52
14.1.2 Measuring range ............... 52
14.2 Output ............................. 52
14.2.1 Output and input variants ......... 52
14.2.2 Output signal .................. 53
14.2.3 Ex connection data .............. 53
14.3 Environment ......................... 53
14.3.1 Ambient temperature range ....... 53
14.3.2 Storage temperature ............. 54
14.3.3 Humidity ..................... 54
14.3.4 Operating altitude ............... 55
14.3.5 Climate class .................. 55
14.3.6 Degree of protection ............. 55
14.3.7 Vibration resistance ............. 55
14.3.8 Shock resistance ................ 55
14.3.9 Mechanical load ................ 56
14.3.10 Electromagnetic compatibility ...... 56
14.4 Process ............................. 56
14.4.1 Process temperature range ........ 56
14.4.2 Thermal shock ................. 56
14.4.3 Process pressure range ........... 56
14.4.4 Test pressure .................. 57
14.4.5 Density ...................... 57
14.4.6 Pressure tightness .............. 58
14.5 Additional technical data ................ 58
Index .................................. 59

Liquiphant FTL51B About this document
Endress+Hauser 5
1 About this document
1.1 Symbols
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
Ground connection
Grounded clamp, which is grounded via a grounding system.
Protective earth (PE)
Ground terminals, which must be grounded prior to establishing any other connections.
The ground terminals are located on the inside and outside of the device.
1.1.3 Symbols for certain types of information
Permitted
Procedures, processes or actions that are permitted.
Forbidden
Procedures, processes or actions that are forbidden.
Tip
Indicates additional information
Reference to documentation
A
Reference to another section
1.
,
2.
,
3.
Series of steps
1.1.4 Symbols in graphics
A, B, C ... View
1, 2, 3 ... Item numbers
-
Hazardous area
.
Safe area (non-hazardous area)

Basic safety instructions Liquiphant FTL51B
6 Endress+Hauser
2 Basic safety instructions
2.1 Requirements for the personnel
The personnel must fulfill the following requirements to carry out the necessary tasks,
e. g., commissioning and maintenance:
‣Trained, qualified specialists must have a relevant qualification for the specific function
and task
‣Are authorized by the plant owner/operator
‣Are familiar with federal/national regulations
‣Must have read and understood the instructions in the manual and supplementary
documentation
‣Follow instructions and comply with conditions
2.2 Designated use
• Only use the measuring device as a limit switch for liquids
• Improper use can pose hazards
• Ensure that the measuring device is free of defects while it is in operation
• Use the measuring device only for media to which the process-wetted materials have an
adequate level of resistance
• Do not exceed or drop below the limit values for the measuring device
 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!
‣If necessary, ensure protection against contact to prevent burns.
For requirements concerning functional safety in accordance with IEC 61508, the
associated SIL documentation must be observed.
2.3 Workplace safety
For work on and with the device:
‣Wear the required protective equipment according to federal/national regulations.
2.4 Operational safety
Risk of injury!
‣Operate the device only if it is in proper technical condition, free from errors and faults.
‣The operator is responsible for ensuring failure-free operation of the device.
Modifications 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.

Liquiphant FTL51B Product description
Endress+Hauser 7
Repair
To ensure continued operational safety and reliability:
‣Only perform repair work on the device if this is expressly permitted.
‣Observe federal/national regulations pertaining to the 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
We only provide a warranty if the device is installed and used as described in the
Operating Instructions. The device has safety mechanisms integrated to prevent users
from inadvertently changing settings.
Provide additional protection for the device and data transfer to/from the device
‣IT security measures defined in the plant owner/operator's own security policy must be
implemented by plant owners/operators themselves.
3 Product description
Point level switch for minimum or maximum detection.

Product description Liquiphant FTL51B
8 Endress+Hauser
3.1 Product design
1
2
3
45
A0036953
 1 Product design
1 Housing with electronic insert and cover, optional Bluetooth module or LED module
2 Optional spacer (temperature spacer or pressure-tight feedthrough (second line of defense))
3 Compact probe design
4 Probe design with pipe extension
5 Probe design with short pipe
Identify the electronic insert via the order code on the nameplate.
Optional: Bluetooth module VU121 or LED module VU120
Contains
FCC ID:
IC:
A0039257
 2 Bluetooth module
A0039258
 3 LED module

Liquiphant FTL51B Incoming acceptance and product identification
Endress+Hauser 9
4 Incoming acceptance and product
identification
4.1 Incoming acceptance
Check the following during goods acceptance:
 Are the order codes on the delivery note and the product sticker identical?
 Are the goods undamaged?
 Do the nameplate data match the ordering information on the delivery note?
 If required (see nameplate): Are the Safety Instructions, e. g. XA, provided?
 Is the device properly secured?
If one of these conditions is not met, please contact the manufacturer's sales office.
4.2 Product identification
The measuring device can be identified in the following ways:
• Nameplate data
• Extended 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 of the information on the measuring device is
displayed along with an overview of the scope of technical documentation provided
• Enter the serial number on the nameplate into the Endress+Hauser Operations App or
use the Endress+Hauser Operations App to scan the 2-D matrix code (QR Code) on the
nameplate
4.2.1 Nameplate
Order code: Ser. no.:
Ext. ord. cd.:
L:
FW:
Dev.Rev.:
Pmax:
0.83 W PNP
2
3
5
1
4
4
A0038187
 4 Nameplate specifications
1 Manufacturer name and device name
2 Manufacturer address
3 Order number, external order code, serial number
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.

Incoming acceptance and product identification Liquiphant FTL51B
10 Endress+Hauser
4.3 Storage and transport
4.3.1 Storage conditions
Use original packaging.
Storage temperature
–40 to +80 °C (–40 to +176 °F)
optional: –52 °C (–62 °F), –60 °C (–76 °F)
4.3.2 Transporting the device
• Transport the device to the measuring point in the original packaging
• Hold the device by the housing, temperature spacer, flange or extension pipe
• Do not bend, shorten or extend the tuning fork
A0034846
 5 Handling the device during transportation

Liquiphant FTL51B Installation
Endress+Hauser 11
5 Installation
LWARNING
Loss of protection rating if the device is opened in a wet environment.
‣Only open the device in a dry environment!
1
A0037879
 6 Installation in any position in a vessel, pipe or tank
1 Temperature spacer for tank with insulation and/or high process temperatures
5.1 Mounting conditions
5.1.1 Taking the switch point into consideration
Typical switch points, depending on the orientation of the point level switch
(water +23 °C (+73 °F))
~13 (0.5)
~4 (0.16)
~12.5 (0.49)
D
A B C
D
D
A0037915
 7 Typical switch points. Unit of measurement mm (in)
A Installation from above
B Installation from below
C Installation from the side
D Switch point

Installation Liquiphant FTL51B
12 Endress+Hauser
5.1.2 Take viscosity into consideration
Low viscosity
> 25 (0.98)
D
A0033297
 8 Installation example for low-viscosity liquids. Unit of measurement mm (in)
D Diameter of installation socket: at least 50 mm (2.0 in)
Low viscosity, e. g. water: < 2 000 mPa⋅s
It is permitted to position the tuning fork within the installation socket.
High viscosity
> 40 (1.57)
A0037348
 9 Installation example for a highly viscous liquid. Unit of measurement mm (in)
NOTICE
Highly viscous liquids may cause switching delays.
‣Make sure that the liquid can run off the tuning fork easily.
‣Deburr the socket surface.
High viscosity, e. g. viscous oils: < 10 000 mPa⋅s
The tuning fork must be located outside the installation socket!

Liquiphant FTL51B Installation
Endress+Hauser 13
5.1.3 Avoiding buildup
A0033239
 10 Installation examples for a highly viscous process medium
• Use short installation sockets to ensure that the turning fork can project freely into the
vessel.
• Install preferably flush-mounted on vessels or in pipes.
• Leave sufficient distance between the buildup expected on the tank wall and the tuning
fork.
5.1.4 Take clearance into consideration
A0033236
 11 Take clearance into consideration
Allow sufficient space outside the tank for mounting, connection and settings involving
the electronic insert.

Installation Liquiphant FTL51B
14 Endress+Hauser
5.1.5 Support the device
A0031874
 12 Support in the event of dynamic load
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).
5.1.6 Weld-in adapter with leakage hole
316L
A0039230
 13 Weld-in adapter with leakage hole
Weld in the welding neck in such a way that the leakage hole is pointing downwards. This
enables any leaks to be detected quickly.
5.2 Mounting the measuring device
5.2.1 Required tools
• Open-ended wrench for sensor installation
• Screwdriver for electrical connection

Liquiphant FTL51B Installation
Endress+Hauser 15
5.2.2 Installation
Horizontal installation in vessels
Align the tuning fork with the marking
316L/G1
A0039125
 14 Marking to align the tuning fork
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 can be used as the marking:
• Material specification, thread description or circle on the hexagonal nut or on the weld-
in adapter
• The II symbol on the back of the flange or Tri-Clamp
Installing in pipes
A0034851
 15 Marking and fork position
• Flow velocity up to 5 m/s with viscosity 1 mm2/s (cSt) and density 1 g/cm3 (SGU)
Check for correct functioning in the event of other process medium conditions
• The marking on the adapter points in the flow direction; the flow is thus not severely
obstructed
• The marking can be identified while the device is installed
Screwing in the device
A0034852
 16 Screwing in the device
• Turn by the hex bolt only, 15 to 30 Nm (11 to 22 lbf ft)
• Do not turn at the housing!

Installation Liquiphant FTL51B
16 Endress+Hauser
Aligning the cable entry
1.
2.
30.7 Nm
3
3.
A0037347
 17 Housing with external locking screw
The locking screw is not tightened when the device is delivered.
1. Release the external locking screw.
2. Turn the housing, align the cable entry.
3. Tighten the external locking screw.
5.3 Sliding sleeves
 See the "Accessories" section.
5.4 Post-installation check
 Is the measuring device undamaged (visual inspection)?
 Does the measuring device conform to the measuring point specifications?
For example:
• Process temperature
• Process pressure
• Ambient temperature range
• Measuring range
 Are the measuring point number and labeling correct (visual inspection)?
Is the measuring device adequately protected against precipitation and direct sunlight?
 Is the device properly secured?

Liquiphant FTL51B Electrical connection
Endress+Hauser 17
6 Electrical connection
6.1 Connection conditions
6.1.1 Cover with securing screw
Covers with a securing screw are available for devices for use in hazardous areas. Do
not release the screw fully.
A0039520
 18 Cover with securing screw
6.1.2 Connecting protective earth (PE)
The protective earth conductor at the device must only be connected if the device's
operating voltage is ≥ 35 VDC or ≥ 16 VACeff.
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.
The plastic housing is available with or without an external protective earth
connection (PE).
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
A functional test can be performed on the device using the test button on the electronic
insert.
Supply voltage
U = 19 to 253 VAC
Residual voltage when switched through: maximum 12 V
Pay attention to the following as per IEC/EN61010-1: Provide a suitable circuit
breaker for the device, and limit the current to 1 A, e. g. by installing a 1 A fuse (slow-
blow) in the line (not the neutral wire) of the supply circuit.
Power consumption
P ≤ 2 VA

Electrical connection Liquiphant FTL51B
18 Endress+Hauser
Current consumption
Residual current when blocked: I ≤ 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.
Power output and load current
• Max 89 VA/253 V (350 mA); max 8.4 VA/24 V (350 mA)
• Min 2.5 VA/253 V (10 mA); min ≥ 0.5 VA/24 V (20 mA)
• With overload and short-circuit protection.
Behavior of output signal
• OK status: load on (switched through)
• Demand mode: load off (blocked)
• Alarm: load off (blocked)
Terminal assignment
Always connect an external load. The electronic insert has integrated short-circuit
protection.
!
>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
 19 2-wire AC, electronic insert FEL61

Liquiphant FTL51B Electrical connection
Endress+Hauser 19
Behavior of switch output and signaling
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
 20 Behavior of switch output and signaling, electronic insert FEL61
MAXDIP switch for setting MAX safety mode
MIN DIP switch for setting MIN safety mode
RD LED, red, for warning or alarm
YE LED, yellow, switch status
GN LED, green, operational status, device on
ILLoad current switched through
6.2.2 3-wire DC-PNP (electronic insert FEL62)
• Three-wire DC version
• Preferably in conjunction with programmable logic controllers (PLC), DI modules as per
EN 61131-2. Positive signal at switch output of electronics module (PNP)
• Functional testing without level change
A functional test can be performed on the device using the test button on the electronic
insert or using the test magnet with the housing closed.
Supply voltage
LWARNING
Failure to use the prescribed power unit.
Risk of fatal injury due to electric shock!
‣The FEL62 may only be powered by devices with safe galvanic isolation, as per
IEC 61010-1.
U =10 to 55 VDC
Pay attention to the following as per IEC/EN61010-1: Provide a suitable circuit
breaker for the device, and limit the current to 500 mA, e. g. by installing a 0.5 A fuse
(slow-blow) in the line (not the neutral wire) of the supply circuit.
Power consumption
P ≤ 0.5 W
Current consumption
I ≤ 10 mA (without load)
The red LED flashes in the event of an overload or short-circuit.

Electrical connection Liquiphant FTL51B
20 Endress+Hauser
Load current
I ≤ 350 mA with overload and short-circuit protection
Capacitance load
C ≤ 0.5 µF at 55 V, C ≤ 1.0 µF at 24 V
Residual current
I < 100 µA (with transistor blocked)
Residual voltage
U < 3 V (with transistor switched through)
Behavior of output signal
• OK status: switched through
• Demand mode: blocked
• Alarm: blocked
Terminal assignment
!
U = 10...55 V DC
I max: 350 mA
1
3
L-L+
COM
MIN
MAX >0,7
>0,5
1
3
0.5 A
L+ L-
I 350 mA
max
U 55 V
max
K
K
IL
PE
4
3
1
2
1
3
4
M12
1 2 3
B
A
L+ L-
K
A0036061
 21 3-wire DC-PNP, electronic insert FEL62
A Connection wiring with terminals
B Connection wiring with M12 connector in housing as per EN61131-2 standard