IFM SDP110 User manual

Operating instructions
Air gap sensor
SDP110
80300121 / 0004 / 2021
GB

SDP110 Air gap sensor
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Contents
1 Preliminary note ............................................................. 4
1.1 Symbols used.......................................................... 4
1.2 Warnings used ......................................................... 4
2 Safety instructions............................................................ 5
3 Intended use................................................................ 6
3.1 Application area ........................................................ 6
4 Function ................................................................... 7
4.1 Output OUT1 selection options............................................. 7
4.2 Output OUT2 selection options............................................. 7
4.3 Distance measurement................................................... 7
4.4 Switching output........................................................ 8
4.5 Analogue output........................................................ 9
4.6 Measured value damping................................................. 10
4.7 Low flow cut-off......................................................... 10
4.8 Simulation............................................................. 11
4.9 Display colour setting .................................................... 11
4.10 IO-Link ............................................................... 11
5 Mounting................................................................... 13
5.1 Orientation ............................................................ 13
5.2 Installation location...................................................... 14
5.3 Process connection...................................................... 14
5.4 Pneumatic connection technology........................................... 14
5.5 Rating of the measuring tubes ............................................. 14
5.6 Measuring nozzle geometry ............................................... 15
6 Electrical connection.......................................................... 16
7 Operating and display elements................................................. 17
8 Menu...................................................................... 18
8.1 Menu overview......................................................... 18
8.2 Main menu and submenus ................................................ 18
9 Set-up..................................................................... 22
10 Parameter setting............................................................ 23
10.1 Parameter setting via IO-Link.............................................. 23
10.1.1 System commands.................................................. 23
10.1.1.1 Flashing On / flashing off ........................................ 23
10.1.1.2 Distance teach ................................................ 23
10.1.2 Identification....................................................... 23
10.1.2.1 Application Specific Tag......................................... 23
10.1.2.2 Function Tag.................................................. 24
10.1.2.3 Location Tag.................................................. 24
10.1.3 Parameters........................................................ 24
10.1.3.1 Access locks to the units: Local parameter setting . . . . . . . . . . . . . . . . . . . . . 24
10.2 Parameter setting via the unit keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
10.2.1 Parameter setting in general........................................... 24
10.2.2 Presets........................................................... 24
10.2.2.1 Process value for OUTx ......................................... 25
10.2.2.2 Standard unit of measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
10.2.3 Setting the output functions............................................ 25
10.2.3.1 Limit monitoring OUTx/ hysteresis function . . . . . . . . . . . . . . . . . . . . . . . . . . 25
10.2.3.2 Limit monitoring OUTx/ window function . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
10.2.3.3 Analogue signal OUT2 .......................................... 25
10.2.4 Distance teach ..................................................... 26
10.2.4.1 Teach via keys on the unit........................................ 26
10.2.4.2 Teach via external teach input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
10.2.4.3 Teach via IO-Link interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
10.2.5 User settings (optional)............................................... 27

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10.2.5.1 Standard display............................................... 27
10.2.5.2 Standard unit of measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
10.2.5.3 Display colour setting ........................................... 27
10.2.5.4 Output logic................................................... 28
10.2.5.5 Measured value damping........................................ 28
10.2.5.6 Measuring nozzle diameter....................................... 28
10.2.5.7 Number of measuring nozzles. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
10.2.5.8 Low flow cut-off................................................ 28
10.2.5.9 Standard conditions ............................................ 28
10.2.5.10 Zero-point calibration pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
10.2.5.11 Switch-on /switch-off delay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
10.2.5.12 Error behaviour of the outputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
10.2.5.13 Lock / unlock.................................................. 28
10.2.5.14 Factory reset.................................................. 29
10.2.6 Diagnostic functions ................................................. 29
10.2.6.1 Reading minimum values / maximum values. . . . . . . . . . . . . . . . . . . . . . . . . . 29
10.2.6.2 Simulation.................................................... 29
11 Operation .................................................................. 31
11.1 Process value display.................................................... 31
11.2 Reading the parameter setting ............................................. 31
12 Troubleshooting ............................................................. 32
12.1 Error messages......................................................... 32
12.2 Warning messages...................................................... 32
13 Maintenance, repair and disposal................................................ 34
13.1 Maintenance........................................................... 34
13.2 Repair................................................................ 34
13.3 Disposal .............................................................. 34
14 Factory setting .............................................................. 35

SDP110 Air gap sensor
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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
1.2 Warnings used
CAUTION
Warning of personal injury
wSlight reversible injuries may result.

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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).
• Only use the product for permissible media.
• 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.

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3 Intended use
The unit monitors the distance value with the help of compressed air in industrial use.
The unit detects the process values distance, flow velocity, volume flow (flow rate/time) and pressure.
3.1 Application area
All indications apply to standard volume flow to DIN ISO 2533, i.e. volume flow at 1013mbar (101.3
kPa), 15 °C and 0 % relative air humidity. The unit can be set to different standard conditions.
Electromagnetic compatibility (EMC):
This is a class A product. This product may cause radio interference in domestic areas:
uIf required, take appropriate EMC screening measures.
Pressure Equipment Directive (PED):
The units comply with the Pressure Equipment Directive and are designed for stable gases of
fluid group 2 and manufactured in accordance with the sound engineering practice.
Use of media from group 1 fluids on request.

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4 Function
• The unit detects the distance of a workpiece using flow measurement.
• The unit detects flow based on the calorimetric measuring principle.
• As an additional process value the unit also detects the pressure.
• The unit can be operated in SIO mode (standard input-output ) or in IO-Link mode.
• The unit displays the current process values.
• The unit has many self-diagnostic options.
• A simulation mode allows simplified set-up of the sensor.
• The unit generates two output signals according to the parameter setting.
4.1 Output OUT1 selection options
• Switching signal distance
• Switching signal flow
• Switching signal pressure
• IO-Link
• OFF (output switched to high impedance)
4.2 Output OUT2 selection options
• Switching signal distance
• Switching signal flow
• Switching signal pressure
• Analogue signal distance
• Analogue signal flow
• Analogue signal pressure
• Input for external distance teach
• OFF (output switched to high impedance)
4.3 Distance measurement
The unit measures the volume flow (flow rate/time) and thus detects the distance: The closer a
workpiece is to a measuring nozzle, the lower the quantity of air that flows through the air gap
between the workpiece and the measuring nozzle.
• The unit detects the airflow as a flow and converts it into a distance value.
• The unit can output the distance value via an analogue signal.
• The unit can output a switching signal when defined distance values are exceeded or not reached.
– Distance values can be taught (Ò Distance teach/26).
– Distance values can be configured (Ò Switching output/8).
• If the surface to be monitored covers several measuring nozzles, the volumetric flow is divided up
over the number of measuring nozzles. The unit calculates an average from all distance values. It
is therefore possible to monitor several measurement points. The number of measuring nozzles is
set via the parameter [NOZ].

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A minimum operating pressure of ≥500mbar (50kPa) is required for a successful distance
measurement.
Dmax
Ø
workpiece
surface to be monitored
measuring nozzle
sensor
Fig.1: Example: surface to be monitored with 2 measuring nozzles
The distance between workpiece and surface to be monitored must not exceed a maximum distance
Dmax. Dmax depends on the diameter of the measuring nozzles and must not exceed the measuring
range of the unit.
In general, the following applies: Dmax ≤ ¼ Ø measuring nozzle at the exit.
Ø measuring nozzle in mm Dmax in µm Dmax none
1.0 250 500
1.1 275 550
1.2 300 600
1.3 325 650
1.4 350 700
1.5 375 750
1.6 400 800
1.7 425 850
1.8 450 900
1.9 475 950
2.0 500 1000
Tab.1: Maximum distance Dmax in relation to 1 measuring nozzle
4.4 Switching output
OUTx changes its switching status if it is above or below the set switching limits. Hysteresis or window
function can be selected.
SP
t
Hno
HY
Hnc
rP
1
0
1
0
1
Fig.2: Hysteresis function
1: Process value
t: Time
SP: Set point
rP: Reset point
HY: Hysteresis
Hno: Hysteresis function NO (normally open)
Hnc: Hysteresis function NC (normally closed)

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When the hysteresis function is set, the set point [SP] and the reset point [rP] are defined. The
rP value must be lower than the SP value. The distance between SP and rP is at least 4 % of
the final value of the measuring range (= hysteresis). If only the set point is changed, the reset
point is changed automatically; the difference remains constant.
FE FE
FH HY
HY
t
Fno
Fnc
FL
1
0
1
0
1
Fig.3: Window function
1: Process value
t: Time
FH: Upper limit value
FL: Lower limit value
HY: Hysteresis
FE: Window area
Fno: Window function NO (normally open)
Fnc: Window function NC (normally closed)
When set to the window function the upper limit value [FH] and the lower limit value [FL] are
defined. The distance between FH and FL is at least 4 % of the final value of the measuring
range. FH and FL have a fixed hysteresis of 0.25% of the final value of the measuring range.
This helps keep the switching status of the output stable if the flow rate varies slightly.
The maximum distance (Ò Distance measurement/7) and the final value of the measuring
range (Ò Technical data) must be observed when setting SP, rP, FL and FH.
The switching signal in case of a fault is adjustable:
• [FOU] = On: The output switches ON in case of a fault.
• [FOU] = OFF: The output switches OFF in case of a fault.
• [FOU] = OU: The output switches ON (pressure measurement) /
The output switches OFF (distance measurement and flow measurement).
4.5 Analogue output
The unit provides an analogue signal of 4…20mA proportional to the process value.
The measuring range is scalable:
• [ASP] determines at which measured value the output signal is 4 mA.
• [AEP] determines at which measured value the output signal is 20 mA.
Minimum distance between ASP and AEP = 20 % of the final value of the measuring range.
The maximum distance (Ò Distance measurement/7) and the final value of the measuring
range (Ò Technical data) must be observed when setting AEP.
If the measured value is outside the measuring range or in the event of an internal error, the current
signal indicated in the following figure is provided.
For measured values outside the setting range or in case of a fault, messages are displayed (UL, OL,
Err, NoData).

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2
1
MEW
M
A
W
AE
P
AS
P
Q
[m3/h]
[µm]
D
0
400
[none]
0
800
[bar]
P
0
-1
16
20
7,2
6
0
4
3,8
3,5
FOU=OFF
20
20,5
21,5
[mA]
FOU=On
6
U
L
O
L
3
4
5
500
1000
(Dmax)
Err Err
Fig.4: Characteristics of the analogue output according to the standard IEC 60947-5-7
1: Analogue signal MAW: Initial value of the measuring range (with setting of low flow
cut-off for Q: signal output starting at MAW + LFC)
2: Process value (Q; P; D) MEW: Final value of the measuring range
3: Detection zone ASP: Analogue start point
4: Setting range AEP: Analogue end point
5: Measuring range UL: Setting range not reached
6: Scaled measuring range OL: Setting range exceeded
Q: Flow
P: Pressure
D: Distance
Under fault conditions the analogue output is adjustable:
• [FOU] = On: The analogue signal goes to 21.5 mA.
• [FOU] = OFF: The analogue signal goes to 3.5 mA.
• [FOU] = OU: The analogue signal goes to 21.5 mA (pressure measurement) /
The analogue signal goes to 3.5 mA (distance measurement and flow measurement).
4.6 Measured value damping
Use the damping time [dAP] to set after how many seconds the output signal has reached 63 % of the
final value if the measured value changes suddenly. The set damping time stabilises the switching
outputs, the analogue outputs, the display and the process value transmission via the IO-Link
interface.
The damping time is added to the response time of the sensor (Ò Technical data).
The signals UL and OL are defined under consideration of the damping time.
The measured value damping only has an effect on the flow and pressure measurement.
dAP.F = measured value damping for the flow
dAP.P = measured value damping for the pressure
In addition to the damping time of the process value, the unit also features a display refresh rate
which, however, only has an influence on the presentation in the display.
4.7 Low flow cut-off
With the function low flow cut-off [LFC] it is possible to suppress small volumetric flow quantities.
Volumetric flow below the LFC value is evaluated by the sensor as standstill (Q = 0).

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4.8 Simulation
With this function, process values are simulated and their signal path is checked.
When the parameter OL is set, process values that lead to an error message or warning can be
simulated.
During the simulation no error message of the current application is available. They are suppressed by
the simulation.
The following values can be simulated:
distance, flow, pressure.
4.9 Display colour setting
The colour of the characters in the display can be set via the parameter [coL.x]:
• Permanent definition of the display colour:
– bk/wh (black/white)
– yellow
– green
– red
• Colour change from red to green or vice versa:
– r-cF (red display colour between the limits cFL...cFH)
– G-cF (green display colour between the limits cFL...cFH)
cFL cFH
MAW MEW
Fig.5: Colour change in the window
section
cFL: Lower limit value
cFH: Upper limit value
MAW: Initial value of the measuring range
MEW: Final value of the measuring range
The limits can be freely selected within the measuring range and are independent of the output
function set for OUT1 and OUT2.
4.10 IO-Link
IO-Link is an internationally standardised IO technology (IEC 61131-9) for communicating with
sensors and actuators.
General information about IO-Link can be found at io-link.ifm.
IO Device Description (IODD) with all parameters and process data of the unit can be found at
documentation.ifm.com.
In the factory setting the unit is in SIO mode (standard input-output). When connected to an IO-Link
master, the unit automatically switches to IO-Link mode.
IO-Link offers the following advantages:
• Noise-immune transmission of all process values.
• Parameter setting during operation or point-to-point at the desk.
• Detection of connected units.

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• Freely definable parameters to identify the units in the plant.
• Additional parameter and diagnostic functions (events) compared to the SIO mode.
• Data storage: Automatic transfer of parameters when a unit is replaced.
• Logging of parameter sets, process values and events.

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5 Mounting
CAUTION
If the medium temperature is above 50 °C (122 °F), parts of the housing can increase in
temperature to over 65 °C (149 °F).
wRisk of burns.
uProtect the housing against contact with flammable substances and unintentional
contact.
uApply the supplied warning label to the sensor cable.
uEnsure that the system is free of pressure during installation.
uThe rules and regulations for the installation and operation of compressed air equipment
must be observed.
5.1 Orientation
2 3
4
1
Fig.6: Orientation of the pipe length and the unit
1: Pipe length vertical, any unit position
2: Pipe length horizontal, unit vertical
3: Pipe length right, unit on side
4: Avoid: pipe length left, unit on side

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5.2 Installation location
Fig.7: Installation location
uFor the continuous elimination of condensation water and particles in
the compressed air system, make sure the unit is installed in a
position higher than the measuring nozzles.
5.3 Process connection
uFit the unit in the pipe in accordance with the flow direction (arrow on the unit):
IN
OU
T
Tighten both adapters in opposite direction by applying the defined tightening torque of 50Nm:
5.4 Pneumatic connection technology
Note when selecting the right push-in fitting:
uAvoid cracks or tapering between the sensor and the push-in fitting.
uDo not use threads with hexagon socket mounting.
They can have a negative impact on the flow profile of the sensor and lead to an increased
inaccuracy of the measured signal.
Recommended push-in fittings: Festo QS-G1/4-6 or QS-G1/4-8 connection
5.5 Rating of the measuring tubes
The response time of the system is mainly determined by the design of the pneumatic system.
Changes in pneumatic pressure are transferred with a time delay since air is compressible.
uMinimize the flow restriction of the measuring tubes (surface quality, cross-section changes,
connections, etc.).
uMake sure that the measurement connection is tight.
Leakage can result in a change of the measurement result.

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5.6 Measuring nozzle geometry
In order to achieve an optimal measuring performance of the unit, the measuring nozzles should have
the following characteristics:
• The measuring nozzle is 1.5 times longer than its diameter at the outlet.
• The access bore hole of the measuring nozzle has 2.5 x the diameter of the measuring nozzle at
the outlet.
• Expanding the access bore hole to an angle of 120°.
• The outlet of the measuring nozzle is sharp-edged.
4
2
3
Ø 1
Ø 2,5
1,5
120°
1
Fig.8: Example of a measuring nozzle with Ø 1 mm
1: Measuring nozzle length 2: Measuring nozzle outlet
3: Widening of the access bore hole 4: Access bore hole of the measuring nozzle

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6 Electrical connection
The device must be connected by a qualified electrician.
Observe the national and international regulations for the installation of electrical equipment.
Voltage supply according to EN50178, SELV, PELV.
uDisconnect power.
uConnect the unit as follows:
L
1 BN
2 WH
4 BK
3 BU
OUT1/IO-Link
OUT2
L+
43
2 1
Fig.9: Wiring diagram (colours to DINEN60947-5-2)
BK: black BN: brown
BU: blue WH: white
Pin Connection
1 L+
3 L-
4 (OUT1) • Switching signal distance
• Switching signal flow
• Switching signal pressure
• IO-Link
• OFF (output switched to high impedance)
2 (OUT2) • Switching signal distance
• Switching signal flow
• Switching signal pressure
• Analogue signal distance
• Analogue signal flow
• Analogue signal pressure
• Input for external distance teach
• OFF (output switched to high impedance)
1
L
1
BN
2
WH
4
BK
3
BU
L+
2
L
1
BN
2
WH
4
BK
3
BU
L+
4
L
1
BN
4
BK
2
WH
3
BU
L+
3
L
1
BN
2
WH
4
BK
3
BU
L+
Fig.10: Circuit examples
1: 2 x positive switching
2: 2 x negative switching
3: 1 x positive switching / 1 x analogue
4: 1 x negative switching / 1 x analogue

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7 Operating and display elements
2
3
4
1
Fig.11: Operating and display
elements
1: Switching status LED for OUT1
2: Switching status LED for OUT2
3: TFT display
4: Keys for changing views and parameter setting
Display illumination:
Unit temperature >70 °C: brightness automatically reduced.
Unit temperature ≥ 100 °C: display automatically switched off.

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8 Menu
The figures in which the menus are displayed show the parameters that can be set on the unit by key
input. These parameters and other functions are also available via the IO-Link interface.
8.1 Menu overview
Use the operating keys to navigate from the process value display to the main menu and from there to
the submenus.
Process value display
1: Main menu
2: Extended functions
[EF]
6: Min/max memory [MEM]
7: Display settings [DIS]
3: Output 1 [OUT1]
5: Basic settings [CFG]
4: Output 2 [OUT2]
8: Display colour [COLR]
9: Simulation mode [SIM]
Fig.12: Menu overview
8.2 Main menu and submenus
The displayed parameters change when the factory setting is changed. The following menu
displays show the maximum available parameters.

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EF
EF rES, Info, OUT1, OUT2, CFG, MEM, DIS, COLR, SIM
rP1
SP1
t.SP1
FH1
FL1
AEP2
ASP2
rP2
SP2
t.SP2
FH2
FL2
Process value display
Fig.13: Main menu
EF
rES
Info
OUT1
OUT2
CFG
MEM
DIS
COLR
SIM
OUT1
OUT2
CFG
MEM
DIS
COLR
SIM
----
----
Main menu
Fig.14: Extended functions [EF] menu

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SEL1
ou1
dS1
dr1
FOU1
OUT1
OU On OFF
Hno Hnc Fno Fnc OFF
FLOW PRESDIST
rP1
SP1 FH1
FL1
EF
Fig.15: Output 1 [OUT1] menu
SEL2
ou2
FOU2
OUT2
OU On OFF
Hno Hnc Fno Fnc tch IOFF
FLOWDIST PRES
AEP2
ASP2 SP2
rP2
FH2
FL2
dS2
dr2
EF
Fig.16: Output 2 [OUT2] menu
EF
CFG
rEF.T ---
NOZ ---
diA ---
LFC ---
rEF.P ---
coF ---
dAP.F ---
---
dAP.P
uni.F l/min m/s ft
3
/h ft
3
/min ft/sm
3
/h
uni.D µm none
uni.P kPa bar psi
P-n PnP nPn
Fig.17: Basic settings [CFG] menu