Endress+Hauser Liquiphant FTL31 User manual

Products Solutions Services
Operating Instructions
Liquiphant FTL31 IO-Link
Point level switch for liquids
BA01935F/00/EN/03.20
71521626
2020-10-05

Liquiphant FTL31 IO-Link
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 FTL31 IO-Link Table of contents
Endress+Hauser 3
Table of contents
1 About this document ........... 4
1.1 Document function ................... 4
1.2 Symbols ............................ 4
1.3 Documentation ...................... 5
1.4 Registered trademarks ................ 6
2 Basic safety instructions ....... 6
2.1 Requirements for the personnel ........ 6
2.2 Designated use ...................... 6
2.3 Workplace safety .................... 7
2.4 Operational safety ................... 7
2.5 Product safety ....................... 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
4.3 Manufacturer address ................ 9
4.4 Storage and transport ................. 9
5 Installation .................... 10
5.1 Mounting conditions ................ 10
5.2 Mounting the measuring device ....... 15
5.3 Post-installation check ............... 17
6 Electrical connection .......... 18
6.1 Connection conditions ............... 18
6.2 Supply voltage ...................... 18
6.3 Connecting the device ............... 19
6.4 Post-connection check ............... 20
7 Operation options ............. 21
7.1 Operation with operating menu ....... 21
8 Overview of the operating
menu .......................... 22
9 System integration ........... 23
9.1 Process data ....................... 23
9.2 Reading out and writing device data
(ISDU – Indexed Service Data Unit) .... 24
10 Commissioning ................ 28
10.1 Function check ..................... 28
10.2 Commissioning the local display ....... 29
10.3 Function test with test magnet ........ 31
10.4 Commissioning with an operating
menu ............................. 31
11 Customer-specific IO-Link
settings ........................ 32
11.1 Configuring a customer-specific switch
point with configuration of a switching
delay and switchback delay: .......... 32
12 Diagnostics and
troubleshooting ............... 33
12.1 General troubleshooting ............. 33
12.2 Diagnostic information via LED
indicator .......................... 33
12.3 Diagnostic events ................... 34
12.4 Overview of diagnostic events ......... 36
12.5 Behavior of the device in the event of a
fault .............................. 37
12.6 Resetting to factory settings (reset) .... 38
13 Maintenance .................. 38
13.1 Cleaning ........................... 38
14 Repair .......................... 38
14.1 Return ............................ 38
14.2 Disposal ........................... 39
15 Description of device
parameters .................... 39
15.1 Diagnosis .......................... 39
15.2 Parameter ......................... 41
15.3 Observation ....................... 49
16 Accessories .................... 50
17 Technical data ................. 50
17.1 Power supply ....................... 50
17.2 Environment ....................... 50
17.3 Process ............................ 52

About this document Liquiphant FTL31 IO-Link
4 Endress+Hauser
1 About this document
1.1 Document function
These Operating Instructions contain all the information that is required in various phases of
the life cycle of the device: from product identification, incoming acceptance and storage, to
mounting, connection, operation and commissioning through to troubleshooting,
maintenance and disposal.
1.2 Symbols
1.2.1 Safety symbols
CAUTION
This symbol alerts you to a dangerous situation. Failure to avoid this situation can result in
minor or medium injury.
DANGER
This symbol alerts you to a dangerous situation. Failure to avoid this situation will result in
serious or fatal injury.
NOTICE
This symbol contains information on procedures and other facts which do not result in
personal injury.
WARNING
This symbol alerts you to a dangerous situation. Failure to avoid this situation can result in
serious or fatal injury.
1.2.2 Tool symbols
Open-ended wrench
1.2.3 Symbols for certain types of information
Permitted
Procedures, processes or actions that are permitted
Preferred
Procedures, processes or actions that are preferred
Forbidden
Procedures, processes or actions that are forbidden
Tip
Indicates additional information
Reference to documentation
A
Reference to page

Liquiphant FTL31 IO-Link About this document
Endress+Hauser 5
Notice or individual step to be observed
1.
,
2.
,
3.
Series of steps
Result of a step
1.2.4 Symbols in graphics
1, 2, 3, ...
Item numbers
A, B, C, ...
Views
1.2.5 Communication-specific symbols
Light emitting diode is off
Light emitting diode is on
Light emitting diode is flashing
1.2.6 Symbols on the device
Safety instructions
Observe the safety instructions contained in the associated Operating Instructions
Temperature resistance of the connection cables
Specifies the minimum value of the temperature resistance of the connection cables
1.3 Documentation
The following types of documentation are available in the Download Area of the Endress
+Hauser website (www.endress.com/downloads):
For an overview of the scope of the associated Technical Documentation, refer to the
following:
•W@M Device Viewer (www.endress.com/deviceviewer): Enter the serial number from
nameplate
•Endress+Hauser Operations App: Enter the serial number from the nameplate or scan
the 2D matrix code (QR code) on the nameplate
1.3.1 Technical Information (TI): planning aid for your device
The document contains all the technical data on the device and provides an overview of the
accessories and other products that can be ordered for the device.

Basic safety instructions Liquiphant FTL31 IO-Link
6 Endress+Hauser
1.3.2 Supplementary documentation
•TI00426F
Weld-in adapters, process adapters and flanges (overview)
•SD01622P
Installation instructions for weld-in adapter G 1", G ¾"
•BA00361F
Installation instructions for weld-in adapter M24x1.5
1.4 Registered trademarks
is a registered trademark of the IO-Link Consortium.
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
The measuring device described in this manual may be used only as a point level switch for
liquids. Incorrect use may pose a hazard. To ensure that the measuring device remains in
perfect condition during the operating time:
• Measuring devices must be used only for media to which the process-wetted materials have
an adequate level of resistance.
• Comply with the limit values in the "Technical data" section.
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.

Liquiphant FTL31 IO-Link Product description
Endress+Hauser 7
Danger of burns from contact with surfaces!
‣In the event of elevated medium temperatures, ensure protection against contact to
prevent burns.
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 interference-free operation of the device.
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 EU
directives listed in the device-specific EU Declaration of Conformity. Endress+Hauser confirms
this by affixing the CE mark to the device.
3 Product description
The Liquiphant FTL31 is a point level switch for universal use in all liquids. It is used
preferably in storage tanks, mixing vessels and pipes.

Product description Liquiphant FTL31 IO-Link
8 Endress+Hauser
3.1 Product design
The point level switch is available in different versions, which can be combined in accordance
with user specifications.
AB
A0022228
 1 Examples of variants
Versions Examples
A B
Electrical connection M12 plug M12 plug
Housing (sensor design)
for process temperatures up to: 150 °C (302 °F) 150 °C (302 °F)
Sensor type Compact version Short tube version
More detailed information and documentation are available:
• Product Configurator on the Endress+Hauser website www.endress.com
• Endress+Hauser sales organization www.addresses.endress.com

Liquiphant FTL31 IO-Link Incoming acceptance and product identification
Endress+Hauser 9
4 Incoming acceptance and product identification
4.1 Incoming acceptance
Check the following during incoming 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 (XA) provided?
If one of these conditions is not met, please contact the manufacturer's sales office.
4.2 Product identification
The following options are available for the identification of the measuring device:
• Nameplate specifications
• Extended order code with breakdown of the device features on the delivery note
‣Enter the serial number from the nameplates into W@M Device Viewer
(www.endress.com/deviceviewer)
 All the information about the measuring device and the scope of the associated
Technical Documentation are displayed.
‣Enter the serial number from the nameplate into the Endress+Hauser Operations App or
use the Endress+Hauser Operations App to scan the 2-D matrix code (QR Code) provided on
the nameplate
 All the information about the measuring device and the scope of the associated
Technical Documentation are displayed.
4.3 Manufacturer address
Endress+Hauser SE+Co. KG
Hauptstraße 1
79689 Maulburg, Germany
Place of manufacture: See nameplate.
4.4 Storage and transport
4.4.1 Storage conditions
• Permitted storage temperature: –40 to +85 °C (–40 to +185 °F)
• Use original packaging.
4.4.2 Transporting the product to the measuring point
Transport the device to the measuring point in the original packaging.

Installation Liquiphant FTL31 IO-Link
10 Endress+Hauser
4.4.3 Handling of the device
NOTICE
Risk of injury! Housing or fork may become damaged or tear!
‣Transport the device to the measuring point in its original packaging or by the housing.
‣Do not hold the device by the fork!
‣Do not use the device as a ladder or climbing aid!
‣Do not bend the fork!
‣Do not shorten or lengthen the fork!
A0020845
 2 Handling of the device
5 Installation
5.1 Mounting conditions
5.1.1 Orientation
Installation is possible in any position in a vessel, pipe or tank.

Liquiphant FTL31 IO-Link Installation
Endress+Hauser 11
1
2
3
A0036961
 3 Installation examples
1 Overfill prevention or upper level detection (maximum safety)
2 Dry running protection for pump (minimum safety)
3 Lower level detection (minimum safety)
5.1.2 Switch point
The switch point A on the sensor depends on the orientation of the point level switch (water
+25 °C (+77 °F), 1 bar (14.5 psi).
Configuration is possible via IO-Link.
A
~30 (1.2)
A
A
~10.5(0.4)
~13 (0.5)
A0020734
 4 Orientation: vertical from above, vertical from below, horizontal; dimensions in mm (in)
5.1.3 Viscosity
Switching delays may occur in the case of highly viscous liquids. Make sure that the liquid can
easily run off the tuning fork:
• If installing in vessels with high-viscosity liquids (A), the tuning fork may not be located in
the installation socket!
• If installing in vessels with low-viscosity liquids (B), the tuning fork may be located in the
installation socket.
• The installation nozzle must be no less than the minimum diameter of 50 mm (2.0 in).

Installation Liquiphant FTL31 IO-Link
12 Endress+Hauser
ø50 (2.0)³
AB
A0022054
 5 Installation options with consideration given to the liquid viscosity, dimensions in mm (in)
A High viscosity (< 10 000 mPa·s)
B Low viscosity (< 2 000 mPa·s)
5.1.4 Buildup
Make sure that the installation socket does not exceed a certain length so that the tuning fork
can project freely into the vessel.
Possibilities for optimization:
• A vertical orientation of the point level switch keeps buildup to a minimum.
• Preferably flush-mounted on vessels or in pipes.
A0022057
 6 Buildup on tank wall, pipe wall and tuning fork

Liquiphant FTL31 IO-Link Installation
Endress+Hauser 13
5.1.5 Weld-in adapter with leakage hole
If installed horizontally, make sure that the leakage hole is pointing down. This allows leaks
to be detected as quickly as possible.
5.1.6 Marking
The marking indicates the position of the tuning fork. If installed horizontally in vessels, the
marking is face up.
The marking is either a material specification (e.g. 316L) or a type of thread (e.g. G ½") and is
located:
• On the hexagonal bolt of the process adapter
• On the nameplate
• On the weld-in adapter
<-1.4435
G1
316L
15°
±
<-1.4435
<-1.4435
G1
316L
A0022641
 7 Orientation in the vessel

Installation Liquiphant FTL31 IO-Link
14 Endress+Hauser
-316L
<
G 3/4
316L
-316L
<
G 3/4
316L
±15°
A0022804
 8 Orientation in the pipe
5.1.7 Installation in pipes
During installation, pay attention to the position of the fork in order to minimize turbulence in
the pipe.
ø >50 (2.0)
<5 m/s (16 ft/s)
ø >10 (0.4)
G 3/4
316L
A0021357
 9 Position of the tuning fork in pipes. Unit of measurement mm (in)
5.1.8 Installation in vessels
If installed horizontally, pay attention to the position of the tuning fork to ensure that the
liquid can drip off.
The electrical connection, e.g. M12 plug, should be established with the cable pointing
downwards. This can prevent moisture from penetrating.

Liquiphant FTL31 IO-Link Installation
Endress+Hauser 15
A0021034
 10 Position of the fork in the case of horizontal installation in a vessel
5.1.9 Distance from wall
Ensure that there is sufficient distance between the expected buildup on the tank wall and the
fork. Recommended distance from wall ≥10 mm (0.39 in).
A0022272
5.2 Mounting the measuring device
Use in accordance with WHG: Prior to mounting the device, pay attention to the WHG
approval documents. Documents available in the Download Area of the Endress+Hauser
website: www.endress.com → download

Installation Liquiphant FTL31 IO-Link
16 Endress+Hauser
5.2.1 Required tool
• Open-ended wrench: only turn by the hex bolt when screwing in.
Torque: 15 to 30 Nm (11 to 22 lbf ft)
• Socket wrench: The socket wrench AF32 is available as an accessory.
Pay attention to the temperature and pressure specifications for seals used at the
customer site.
5.2.2 Installation
"Weld-in adapter accessories" thread
1
2
L1
L2
32 mm
A0023245
 11 "Weld-in adapter accessories" thread
1 Flat seal
2 Weld-in adapter
G ¾"
• L1: 63.9 mm (2.52 in)
• L2: 38.0 mm (1.5 in)
G 1"
• L1: 66.4 mm (2.61 in)
• L2: 48.0 mm (1.89 in)
Pressure and temperature (maximum):
+25 bar (+362 psi) at +150 °C (+302 °F)
+40 bar (+580 psi) at +100 °C (+212 °F)
When using a weld-in adapter with flush-mount seal, remove the supplied flat seal (1)
from the thread before mounting.

Liquiphant FTL31 IO-Link Installation
Endress+Hauser 17
Metric thread in customer nozzle
66.4 (2.6)
47.9 (1.8)
32 mm
A0022026
 12 Metric thread in customer nozzle
G 1"
Pressure and temperature (maximum):
+40 bar (+580 psi) at 150 °C (302 °F)
NPT thread (ANSI B 1.20.1)
32 mm
P
T
F
E
A0022028
 13 NPT thread (ANSI B 1.20.1)
Pressure and temperature (maximum):
+40 bar (+580 psi) at +150 °C (+302 °F)
Wrap in sealing material if necessary.
5.3 Post-installation check
Are the device and cable undamaged (visual inspection)?

Electrical connection Liquiphant FTL31 IO-Link
18 Endress+Hauser
Does the device comply with the measuring point specifications?
• Process temperature
• Process pressure
• Ambient temperature range
• Switch point/measuring range
Are the measuring point identification and labeling correct (visual inspection)?
Is the device adequately protected against moisture and direct sunlight?
Is the device adequately protected against impact?
Are all mounting and safety screws securely tightened?
Is the device properly secured?
6 Electrical connection
6.1 Connection conditions
The measuring device has two modes of operation:
• Maximum point level detection (MAX): e.g. for overfill protection
The device keeps the electrical switch closed as long as the sensor is not yet covered by
liquid or the measured value is within the process window.
• Minimum point level detection (MIN): e.g. to protect pumps from dry running.
The device keeps the electrical switch closed as long as the sensor is covered by liquid or the
measured value is outside the process window.
Choosing the "MAX"/"MIN" mode of operation ensures that the device switches in a safety-
oriented manner even in the event of an alarm condition, e.g. if the power supply line is
disconnected. The electronic switch opens if the point level is reached, if a fault occurs or if the
power fails (quiescent current principle).
• IO-Link: Communication on pin 4; switch mode on pin 2.
• SIO mode: If there is no communication, the device switches to the SIO mode =
standard IO mode.
The functions configured in the factory for the MAX and MIN modes can be changed via
IO-Link:
• HNO/HNC hysteresis
• FNO/FNC window
6.2 Supply voltage
SIO mode
10 to 30 VDC
IO-Link mode
18 to 30 VDC
IO-Link communication is guaranteed only if the supply voltage is at least 18 V.

Liquiphant FTL31 IO-Link Electrical connection
Endress+Hauser 19
6.3 Connecting the device
LWARNING
Risk of injury from the uncontrolled activation of processes!
‣Switch off the supply voltage before connecting the device.
‣Make sure that downstream processes are not started unintentionally.
LWARNING
An incorrect connection compromises electrical safety!
‣In accordance with IEC/EN61010 a suitable circuit breaker must be provided for the device.
‣Voltage source: Non-hazardous contact voltage or Class 2 circuit (North America).
‣The device must be operated with a 500 mA fine-wire fuse (slow-blow).
‣Protective circuits against reverse polarity are integrated.
L–
L+
C/Q1
21
34SIO
IO-Link
K1
Q2
0.5A
A0037916
Pin 1 Supply voltage +
Pin 2 1st switch output
Pin 3 Supply voltage -
Pin 4 IO-Link communication or 2nd switch output (SIO mode)
6.3.1 SIO mode (without IO-Link communication)
K1, K2: External load
Minimum safety
Terminal assignment MIN output LED yellow (ye) 1
L– L+
21
34
K1 0.5A
ye1
A0037919
+4
4
+

Electrical connection Liquiphant FTL31 IO-Link
20 Endress+Hauser
Maximum safety
Terminal assignment MAX output LED yellow (ye) 2
21
34
L– L+
K1
0.5A
ye2
A0037918
2
+
+ 2
Function monitoring with M12 plug
When both outputs are connected, the MIN and MAX outputs assume opposite states (XOR)
when the device is operating fault-free. In the event of an alarm condition or a line break,
both outputs are de-energized. This means that function monitoring is possible in addition to
level monitoring. The behavior of the switch outputs can be configured via IO-Link.
Connection for function monitoring using XOR operation
Terminal assignment MAX output LED yellow
(ye) 2 MIN output
LED
yellow
(ye) 1
LED red
(rd)
21
34
L– L+
K2
K1
0.5A
ye2
A0037918
ye1
A0037919
2
+
+4
+ 2
4
+
2
+
4
+
6.4 Post-connection check
Are the device and cable undamaged (visual inspection)?
Does the supply voltage match the specifications on the nameplate?
If supply voltage is present, is the green LED lit?
With IO-Link communication: is the green LED flashing?