IFM LI213 Series User manual

Operating instructions
Binary level sensor for overflow prevention / leakage
detection according to WHG
LI213x
11462742 / 0007 / 2022
GB

LI213x Binary level sensor for overflow prevention / leakage detection according to WHG
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Contents
1 Preliminary note ............................................................. 3
1.1 Symbols used.......................................................... 3
2 Safety instructions............................................................ 4
3 Intended use................................................................ 5
3.1 Type designation........................................................ 5
3.2 Application area ........................................................ 5
3.3 Restriction of the application area........................................... 5
4 Function ................................................................... 6
4.1 Measuring principle level.................................................. 6
4.2 Measuring principle temperature............................................ 6
4.3 Features of the device.................................................... 6
4.4 IO-Link ............................................................... 7
4.5 Application examples .................................................... 7
5 Installation.................................................................. 9
5.1 Mechanical installation ................................................... 9
5.2 Determining the installation depth, installation distances. . . . . . . . . . . . . . . . . . . . . . . . . . 9
6 Electrical connection.......................................................... 12
7 Parameter setting............................................................ 13
7.1 Parameter setting via the teach button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
7.2 Operating status and switching status indication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
7.3 Unlock device.......................................................... 14
7.4 Empty adjustment....................................................... 14
7.4.1 Application as overflow prevention or maximum monitoring . . . . . . . . . . . . . . . . . . . 14
7.4.2 Application as leakage detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
7.5 Full adjustment......................................................... 16
7.5.1 Application as overflow prevention or maximum monitoring . . . . . . . . . . . . . . . . . . . 16
7.5.2 Application as leakage detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
7.6 Parameter setting via IO-Link.............................................. 17
7.6.1 Parameter setting via the memory plug . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
7.7 Adjustable parameters and system commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
7.8 Parameter setting examples via IO-Link . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
7.8.1 Application as overflow prevention or maximum monitoring . . . . . . . . . . . . . . . . . . . 20
7.8.2 Application as leakage detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
8 Operation .................................................................. 21
8.1 Function check......................................................... 21
8.2 Operation indication by LEDs (factory setting). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
9 Maintenance, repair and transport................................................ 22
10 Factory setting .............................................................. 23

Binary level sensor for overflow prevention / leakage detection according to WHG LI213x
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1 Preliminary note
You will find instructions, technical data, approvals and further information using the QR code on the
unit / packaging or at www.ifm.com.
1.1 Symbols used
Requirement
Instructions
Reaction, result
[...] Designation of keys, buttons or indications
Cross-reference
Important note
Non-compliance may result in malfunction or interference.
Information
Supplementary note

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2 Safety instructions
• The unit described is a subcomponent for integration into a system.
– The system architect is responsible for the safety of the system.
– The system architect undertakes to perform a risk assessment and to create documentation in
accordance with legal and normative requirements to be provided to the operator and user of
the system. This documentation must contain all necessary information and safety instructions
for the operator, the user and, if applicable, for any service personnel authorised by the
architect of the system.
• Read this document before setting up the product and keep it during the entire service life.
• The product must be suitable for the corresponding applications and environmental conditions
without any restrictions.
• Only use the product for its intended purpose (Ò Intended use).
• If the operating instructions or the technical data are not adhered to, personal injury and/or damage
to property may occur.
• The manufacturer assumes no liability or warranty for any consequences caused by tampering with
the product or incorrect use by the operator.
• Installation, electrical connection, set-up, operation and maintenance of the product must be
carried out by qualified personnel authorised by the machine operator.
• Protect units and cables against damage.
• Only use the product for permissible media (Ò Technical data).
• The unit complies with the standard EN 61000-6-4 and is a class A product. The unit may cause
radio interference in domestic areas. If interference occurs, the user must take appropriate actions.

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3 Intended use
The device described here is approved according to WHG (German Federal Water Act, federal
law applicable in the Federal Republic of Germany). If the device is used as an overflow
prevention or leakage sensor according to WHG, the respective “Technical Description” (only
available in German) must be observed in addition to this documentation.
The device monitors the level (point level) and the temperature of liquid media in tanks.
It is particularly suitable for monitoring the overfilling of tanks as part of an overflow prevention system
according to WHG.
It is also particularly suitable as part of a leakage detection system in accordance with WHG to monitor
the leakage of liquid media in collection rooms, collection systems, inspection chambers and hoppers.
3.1 Type designation
Level sensor type LI213x (x = probe length coded).
3.2 Application area
Water, hydrous media, oils, oil-based media, emulsions.
3.3 Restriction of the application area
• Use the product only for media to which the wetted materials are sufficiently resistant (→ Technical
data sheet).
• The device is not suitable for hygienic areas.
• The device is not suitable for applications where the probe is subjected to permanent and high
mechanical stress (e.g. bulk materials, abrasive media or fast flowing media containing solid
particles).
• Highly conductive foam can trigger a switching operation. Check the consequences by performing
a test in your application!

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4 Function
4.1 Measuring principle level
The device operates on the capacitive measuring principle. It detects by direct contact with the
medium whether the requested level (point level) is reached.
The relative permittivity of a medium is important for its detection (formerly: dielectric constant). Media
with a relative permittivity greater than 1.8 are reliably detected.
Electrically conductive and non conductive media are detected.
Relative permittivity (dielectric constant) of common media
Mineral oil ≈ 2
Coolant emulsion ≈ 25...75
Glycol ≈ 37
Water ≈ 80
1
The device operates with radial detection characteristics. Therefore,
media below the active zone (1) are not detected.
When perfectly adjusted, the presence of certain media can be detected while build-up or foam
is suppressed.
4.2 Measuring principle temperature
The temperature is detected by a temperature element at the lower end of the probe and electronically
evaluated.
4.3 Features of the device
• The device versions are offered with different probe lengths.
• Point level selectable by the installation length.
• Parameter setting via teach button or IO-Link.
• The device has two switching outputs:
– Output OUT-OP is permanently assigned to the process value level (limit level) and is
permanently designed as normally closed.
– Output OUT2 can be assigned to either the process value level (limit level) or temperature and
can be programmed as normally closed / normally open.
• Adjustment function (empty and full adjustment) to the medium to be detected.
• Defined state in case of a fault.

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4.4 IO-Link
IO-Link is a communication system for connecting intelligent sensors and actuators to automation
systems. IO-Link is standardised in the IEC 61131-9 standard.
General information on IO-Link at io-link.ifm
Input Output Device Description (IODD) with all parameters, process data and detailed
descriptions of the device at documentation.ifm.com
IO-Link offers the following advantages:
• Interference-free transmission of all data and process values
• Parameter setting in the running process or presetting outside the application
• Parameters for identifying the connected devices in the system
• Additional parameters and diagnostic functions
• Automatic backup and restore of parameter sets in case of device replacement (data storage)
• Logging of parameter sets, process values and events
• Device description file (IODD - Input Output Device Description) for easy project planning
• Standardised electrical connection
• Remote maintenance
4.5 Application examples
Overflow prevention in a supply tank for coolant emulsion
Leakage monitoring in the overflow vessel of a hydraulic power pack

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Minimum level monitoring

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5 Installation
5.1 Mechanical installation
The installation position is vertical, the required immersion depth until the response level is reached
must be taken into account during installation Determining the installation depth, installation distances
(Ò/9)
Screw-in or flange adapters are available for installation. After attaching this mounting accessory, the
probe can be passed through the opening. Use the enclosed stainless steel tube clip to determine the
setting value (installation height). The tightening of the coupling nut allows the fixation of the response
level following the already completed installation.
Use seals resistant to media.
5.2 Determining the installation depth, installation distances
The installation depth must be selected so that the active zone (MET) is safely covered by the liquid to
be monitored and the medium is safely detected.
The immersion depth at which the device switches depends on the medium and the installation
situation and is a maximum of 28 mm. Use suitable mounting accessories and enclosed stainless
steel tube clip to set and mark the response level.

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Application as overflow prevention:
MET
L3
A
H
L1
L
L2
S
M
A: Response level
H: Tank height
L: Probe length
L1: Insertion depth
L2: Outside length
L3: Installation depth (min.: 60mm)
M: Height mounting adapter
MET: Maximum immersion depth (active zone) = 28 mm
S: Nozzle height
uMake sure that the active zone is at least 20 mm away from metallic tank walls or structures in the
tank and at least 5 mm from the tank floor.

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Application as leakage detection:
MET
L3
A
≥ 5
H
L1
L
L2
S
M
A: Response level
H: Tank height
L: Probe length
L1: Insertion depth
L2: Outside length
L3: Installation depth (min.: 60mm)
M: Height mounting adapter
MET: Maximum immersion depth (active zone) = 28 mm
S: Nozzle height
uFor early detection of a leakage, the installation depth should be as long as possible and the
response level as low as possible (distance of the device from the bottom of the collection system ≥
5 mm).
uMake sure that the active zone is at least 20 mm away from metallic tank walls or structures in the
tank.

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6 Electrical connection
The unit must be connected by a qualified electrician.
Observe the national and international regulations for the installation of electrical equipment.
Voltage supply according to SELV, PELV.
uDisconnect power.
uConnect the unit as follows:
L
1 BN
2 WH
4 BK
3 BU
OUT-OP/IO-Link
OUT2
L+
43
2 1
Fig.1: Wiring diagram (colours to DINEN60947-5-2)
BK: Black BN: Brown
BU: Blue WH: White
Pin Connection
1 L+
3 L-
4(OUT-OP) • Switching output (normally closed)
• IO-Link
2(OUT2) • Switching output (NC / NO programmable)

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7 Parameter setting
On delivery, the device is set to detecting low dielectric media (e.g. oils and oil-based media). In many
cases the factory setting is sufficient, so that no further settings are required.
uCheck the function by performing an application test.
In case the factory settings are not sufficient:
uAdapt the device to the application.
The device can be configured using the inductive teach button or via IO-Link. Some functions
are only available via IO-Link.
Ensure that no malfunctions or hazardous conditions occur in the system.
All of the following operations and the described LED behaviour refer to the factory setting.
7.1 Parameter setting via the teach button
The teach button can be used first to unlock the device and then to adjust the device sensitivity.
The inductive teach button is operated with a metal object (e.g. screwdriver 1 x 5.5 mm) by
applying it flat to the teach surface. No operation is triggered by short (less than 1 s) or
permanent (statical) (longer than 30 s) actuation of the button.
1
1: Teach button
The device sensitivity is adjusted by optionally carrying out an empty adjustment and / or a full
adjustment.
The switching thresholds (switch point and reset point) are automatically defined with the adjustment
procedure.
Teach only has an effect on the process value “level” and always affects both outputs (OUT-OP
and OUT2).
Any other settings can only be configured via IO-Link
The device is locked at the beginning of operation and after 120 s of inactivity (operating hurdle
to avoid unintentional input of incorrect values).

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7.2 Operating status and switching status indication
2
3
1
Fig.2: Top view and LEDs
1:2: LED1 (yellow) and LED2 (yellow) = switching status OUT-OP
3: LED3 (green) = operating status
*) On delivery, the two yellow LEDs (LED1 and LED2) indicate the switching status of output OUT-OP.
This behaviour can be configured via IO-Link: Parameter setting via IO-Link (Ò/17)
7.3 Unlock device
uActuate teach button for at least 10 s.
wThe green LED3 flashes with approx.1 Hz during the 10 s. Expiration of the 10 s is acknowledged
with double-flashing (approx. 2 Hz).
uRelease the teach button (remove metal object).
wThe green LED is lit permanently. The device is now unlocked.
After 120s of inactivity, the device locks itself again automatically.
uInitiate operations within this period.
The green LED flashes by way of signalling if you try to initiate operation while the device is
locked. The device remains locked if the teach button is released before 10 s have expired.
7.4 Empty adjustment
7.4.1 Application as overflow prevention or maximum monitoring
The device must be adjusted after installation in the empty tank (empty adjustment). The tank can be
considered to be “empty” when the medium to be detected is min. 20 mm away from the active zone.
If the installation situation or the medium is changed, it is mandatory to carry out the empty adjustment
again.
If the device detects a medium after adjustment, its switching status changes.
uEmpty the tank until the medium is at least 20 mm below the end
of the probe.
uUnlock device

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uActuate the teach button for at least 1 s / not more than 4 s.
wFirst, the green LED3 is shortly extinguished, after 1 s the two
yellow LEDs flash slowly (approx.1 Hz).
uRelease the teach button (remove metal object).
wSuccessful empty adjustment is acknowledged with a double-
flashing (approx. 2 Hz) of the green LED.
wThe device is ready for operation.
After the empty adjustment, all LEDs (LED1...3) light up.
The device is operational just with empty adjustment. However, it is recommended to carry out a
“full adjustment” with the active zone being completely covered after empty adjustment. On the
basis of the values for the empty state / full state the device software determines the optimum
position of the switching thresholds between the two states. Using both adjustment criteria
(empty and full adjustment) results in the maximum operational reliability for the application. The
full adjustment can be repeated as often as you like. The stored value for the empty state is not
overwritten by the full adjustment. After a new empty adjustment both values are automatically
reset; the values defined last are overwritten.
7.4.2 Application as leakage detection
The device must be adjusted after installation in the empty collection system (empty adjustment). If the
installation situation is changed, it is mandatory to perform the empty adjustment again.
If the device detects a medium after adjustment, its switching status changes.
uMake sure that the collection system is empty, otherwise empty it
completely.
uUnlock device
uActuate the teach button for at least 1 s / not more than 4 s.
wFirst, the green LED3 is shortly extinguished, after 1 s the two
yellow LEDs flash slowly (approx.1 Hz).
uRelease the teach button (remove metal object).
wSuccessful empty adjustment is acknowledged with a double-
flashing (approx. 2 Hz) of the green LED.
wThe device is ready for operation.
After the empty adjustment, all LEDs (LED1...3) light up.

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The device is operational just with empty adjustment. However, it is recommended to carry out a
“full adjustment” with the active zone being completely covered after empty adjustment. It is
recommended to use a test medium with the same dielectric constant as the medium to be
monitored for leakage. On the basis of the values for the empty state / full state the device
software determines the optimum position of the switching thresholds between the two states.
Using both adjustment criteria (empty and full adjustment) results in the maximum operational
reliability for the application. The full adjustment can be repeated as often as you like. The
stored value for the empty state is not overwritten by the full adjustment. After a new empty
adjustment both values are automatically reset; the values defined last are overwritten.
7.5 Full adjustment
7.5.1 Application as overflow prevention or maximum monitoring
After empty adjustment the full state is to be achieved, if possible, so that the device switches (both
yellow LEDs are off).
uFill the tank until the active zone is completely covered.
uUnlock device
uActuate the teach button for at least 4 s / not more than 7 s.
wFirst, the green LED3 is shortly extinguished, after 1 s the two
yellow LEDs start flashing slowly (approx. 1 Hz) before flashing
quickly (approx. 2 Hz) after 4 s.
uRelease the teach button (remove metal object).
wSuccessful full adjustment is acknowledged with a double-
flashing (approx. 2 Hz) of the green LED.
wThe device is ready for operation.
After the full adjustment, both yellow LEDs are off, only the green LED is still on.
7.5.2 Application as leakage detection
After the empty adjustment, the state “probe covered” should be established, if possible, so that the
device switches (both yellow LEDs are off).

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uFill the collection system or simulate the full state in a suitable
way with a test tank filled with a test medium until the active zone
is completely covered.
uUnlock device
uActuate the teach button for at least 4 s / not more than 7 s.
wFirst, the green LED3 is shortly extinguished, after 1 s the two
yellow LEDs start flashing slowly (approx. 1 Hz) before flashing
quickly (approx. 2 Hz) after 4 s.
uRelease the teach button (remove metal object).
wSuccessful full adjustment is acknowledged with a double-
flashing (approx. 2 Hz) of the green LED.
wThe device is ready for operation.
After the full adjustment, both yellow LEDs are off, only the green LED is still on.
7.6 Parameter setting via IO-Link
After a factory reset the device reboots and the factory settings are restored.
When the medium is changed, it may also be necessary to adapt the device settings.
Parameters can be set before installation or during operation.
If you change parameters during operation, this will influence the function of the plant.
uEnsure that there will be no malfunctions in your plant.
During parameter setting the unit remains in the operating mode. It continues to monitor with the
existing parameter until the parameter setting has been completed.
Requirements for parameter setting via the IO-Link interface:
üA suitable parameter setting software, e.g. ifm moneo|configure
üThe Input Output Device Description (IODD) for the device, see documentation.ifm.com
üOne IO-Link master
uConnect the IO-Link master to a parameter setting software.
uSet the port of the master to the IO-Link operating mode.
uConnect the device to a free port of the IO-Link master.
wThe unit switches to IO-Link mode.
uChange parameter settings in the software.
uWrite parameter settings to the unit.
Notes on parameter setting Ò Manual of the parameter setting software

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7.6.1 Parameter setting via the memory plug
A parameter set can be written to the device / can be recorded by the device via a memory plug (ifm
storage module): www.ifm.com.
In order to allow for data to be written from the memory plug to the device, the device must have
the factory setting.
If the device has been configured, the memory plug records the parameter set which can then
be transferred to other devices of the same type.
uLoad a suitable parameter set (e.g. from a PC or from a device of the same type) to the memory
plug.
uConnect the memory plug between device and socket.
wDevice with factory setting:
When voltage is supplied, the parameter set is transferred from the memory plug to the device.
wDevice with changed settings:
When voltage is supplied, the memory plug records the parameter set of the device.
uRemove the memory plug.
uPut the device into operation.
More information on the memory plug: Ò Documentation www.ifm.com.
7.7 Adjustable parameters and system commands
Parameter Options
SEL2 Assignment of the switching output OUT2 to the process value:
[LEVL] = level1)
[TEMP] = temperature
P-n Output polarity for the switching outputs:
[PnP] = positive switching
[nPn] = negative switching
ou2 Output configuration for switching output OUT2 (level / temperature)
[Hno] = hysteresis function / normally open
[Hnc] = hysteresis function / normally closed
[Fno] = window function2) / normally open
[Fnc] = window function2) / normally closed
[OFF] = output OFF (high impedance)
SP-OP - LEVL Switch point for switching output OUT-OP (overflow prevention / leakage detection)
[SP-OP] must be greater than [rP-OP]. If the [SP-OP] is set below the [rP-OP], this will be rejected
by the device software.
The values for [SP-OP] / [rP-OP] are set in per cent of the maximum process value.
The process value is defined as follows:
Process value in the air (not predamped): approx. 0 %
Process value in tap water = approx. 100 %3)
rP-OP - LEVL Reset point for switching output OUT-OP (overflow prevention / leakage detection)
SP2 - LEVL Switch point for switching output OUT2 (level)
[SP2] must be greater than [rP2]. If the [SP2] is set below the [rP2], this will be rejected by the de-
vice software.
rP2 - LEVL Reset point for switching output OUT2 (level)
SP2 (FH2) - TEMP Switch point for switching output OUT2 or upper limit with window function for temperature
([SEL2]=[TEMP]).

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Parameter Options
SP2 (FH2) - TEMP
[SP2 (FH2)] must be greater than [rP2 (FL2)]. If the [SP2 (FH2)] is set below the [rP2 (FL2)], this
will be rejected by the device software.
rP2 (FL2) - TEMP Reset point for switching output OUT2 or lower limit with window function for temperature
([SEL2]=[TEMP]).
dS2 Switch-on delay4) for OUT2.
Setting range 0.0...10.0 s
dr2 Switch-off delay4) for OUT2.
Setting range 0.0...10.0 s
FOU2 Response of OUT2 in case of a fault:
[OFF] = switching output switches OFF in case of a fault.
[On] = switching output switches ON in case of a fault.
[OU] = switching output reacts according to process value, if possible.
uni.T Selection of the temperature unit:
[°C] = temperature is displayed in °C (degrees Celsius)
[°F] = temperature is displayed in °F (degrees Fahrenheit).
Lo.T Minimum value memory for the temperature
Hi.T Maximum value memory for the temperature
LED mode Indication of the switching states by LEDs:
[OUT-OP] = Both yellow LEDs (LED1 and LED2) indicate the switching status of output OUT-OP.
[OUT-OP+OUT2] = LED1 indicates the switching status of OUT-OP and LED2 the switching status of
OUT2.
Access locks to the
device.
Local parameter set-
ting
[Open] = Parameter setting via teach button is permitted.
[Locked] = Parameter setting via teach button is locked.
1) This setting is not possible in combination with [ou2] = [Fno] or [Fnc].
2) This setting is only possible in combination with [SEL2] = [TEMP].
3) Tap water in a grounded metal tank
4) Response according to VDMA. According to VDMA the switch-on delay always has an effect on SP,
the switch-off delay always on rP irrespective of whether the normally open or normally closed function
is used.
System commands
Reset to factory settings Restore delivery state (factory settings)
Empty teach Empty adjustment, automatically sets the switching thresholds for level.
Full teach Full adjustment to medium, automatically sets the switching thresholds for lev-
el.
Reset
[Hi.T] and [Lo.T]
Reset maximum and minimum value memory
Flash On Visual signalling (double-flashing) for localisation ON.
The signalling ends automatically after 1 minute.
Flash Off Visual signalling (double-flashing) for localisation OFF
Start simulation Start simulation
The process value for level is set to 100 %, output OUT-OP opens.
Stop simulation Stop simulation
The process value for level is set to the real value again.

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7.8 Parameter setting examples via IO-Link
7.8.1 Application as overflow prevention or maximum monitoring
uSet switching output OUT2 to temperature detection.
Example: [SEL2] = [TEMP]
uThe temperature output OUT2 shall be employed as alarm output (as normally closed with a high
temperature threshold). Example: [ou2] = [Hnc]
uSet the alarm temperature to 80°C.
Example:
[SP2 (FH2)-TEMP] = 80;
[rP2 (FL2)-TEMP] = 75.
uTransfer the parameter data to the device
uCarry out the empty adjustment by executing the system command [Empty Teach].
uIf possible, carry out a full adjustment to the medium to be detected:
Fill the tank until the active zone of the device is completely covered.
Notes: Ò Empty adjustment and full adjustment.
uExecute the system command [Full Teach].
Any other settings are left at factory setting.
7.8.2 Application as leakage detection
uMake sure that the collection system is empty, otherwise empty it completely.
uCarry out the empty adjustment by executing the system command [Empty Teach].
uIf possible, carry out a full adjustment to the medium to be detected:
Fill the collection system until the active zone of the device is completely covered.
Notes: Ò Empty adjustment and full adjustment.
uExecute the system command [Full Teach].
Any other settings are left at factory setting.