Festo SFAW User manual

SFAW
Flow sensor
Operating instruc-
tion
8167776
2022-09c
[8167778]

Translation of the original instructions
IO-Link® is a registered trademark of its respective trademark holder in certain countries.

Festo — SFAW — 2022-09c
3
Table of contents
1 Applicable Documents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2 Safety. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.1 Safety instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.2 Intended use. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.3 Training of qualified personnel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.4 UL/CSA certification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3 Additional information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4 Product overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4.1 Structure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4.1.1 Product design. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4.1.2 Display components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4.2 Function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.2.1 Operating statuses. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.2.2 Switching outputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.2.3 Analogue output OutD. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.2.4 Filter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.2.5 Functional principle. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.2.6 Security code. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.2.7 Minimum value and maximum value. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5 Mounting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5.1 Inlet situation and outlet situation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5.1.1 Mounting position/inflow. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.2 Mounting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.2.1 Installing sensor without mounting accessories. . . . . . . . . . . . . . . . . . . . . . . . 17
5.2.2 Mounting sensor with wall mounting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.3 Tubing sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.4 Changing fluid connector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
6 Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
6.1 Installation, electrical. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
7Commissioning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
7.1 Switching on the sensor in RUN mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
7.2 Displaying parameters in SHOW mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
7.2.1 Starting SHOW mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
7.2.2 Show and reset minimum value/maximum value. . . . . . . . . . . . . . . . . . . . . . . 21
7.2.3 Display mean value and reverse related filter time constants. . . . . . . . . . . . . 21
7.3 Configuring the sensor in EDIT mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
7.3.1 Entering the security code. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
7.3.2 Setting the switching characteristics of the switching outputs. . . . . . . . . . . . 24
7.3.3 Setting display units and analogue output. . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
7.3.4 Changing sensor settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
7.3.5 Replicating parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
7.4 Teach-in switching points in TEACH mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
7.5 Measure volume manually in RECORDER mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

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8 Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
8.1 Reset parameters to factory setting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
9 Cleaning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
10 Fault clearance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
11 Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
12 Technical data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
12.1 Technical data of UL/CSA certification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
12.2 Hole patterns and dimensional drawings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
12.2.1 Hole pattern for direct mounting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
12.2.2 Hole pattern for wall mounting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
12.2.3 Dimensional drawing of customer-specific fluid connections . . . . . . . . . . . . . . 36

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Safety
5
1 Applicable Documents
All available documents for the product è www.festo.com/sp.
2Safety
2.1 Safety instructions
–Only use the product in its original condition without unauthorised modifications.
–Only use the product if it is in perfect technical condition.
–Do not use the product in combination with flammable, caustic, vapour-emitting or other media
hazardous to health.
–Take into account the ambient conditions at the location of use.
–Only use media in accordance with the specifications è Technical data.
–Foreign matter and other contaminants in the operating medium may damage the product and
cause incorrect measurements and malfunctions.
–Check the operating medium to determine the media compatibility with the materials it contacts.
–Observe the identifications on the product.
–Remove all transport packaging.
2.2 Intended use
The flow sensor monitors the flow rate, volume and temperature of liquid media in piping systems or
terminal devices in industry.
2.3 Training of qualified personnel
Work on the product may only be carried out by qualified personnel who can evaluate the work and
detect dangers.
The technicians have knowledge and experience in handling fluidic systems in the intended area of
application.
2.4 UL/CSA certification
In combination with the UL inspection mark on the product, the information in this section must also
be observed in order to comply with the certification conditions of Underwriters Laboratories Inc. (UL)
for USA and Canada.
UL/CSA approval information
Product category code QUYX, QUYX7
File number E322346
Considered standards UL 610101, CAN/CSA-22.2 No. 61010-1
UL mark
Tab. 1: UL/CSA certification information
Only for connection to a NEC/CEC Class 2 supply.

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Product overview
WARNING
The unit shall be supplied by a power source which fulfils the requirements on a limited-energy
circuit in accordance to IEC/EN/UL/CSA 61010-1 or on a Limited Power Source (LPS) in accordance to
IEC/EN/UL/CSA 60950-1 or IEC/EN/UL/CSA 62368-1 or a Class 2 circuit in accordance to NEC or CEC.
3Additional information
–Contact the regional Festo contact if you have technical problems è www.festo.com.
–Accessories and spare parts è www.festo.com/catalogue.
4 Product overview
4.1 Structure
4.1.1 Product design
1
3
4
5
678
2
Fig. 1: Control elements and connection elements
1
Fluid port 1, input, rotatable
2
Locking plate
3
Fluid port 2, output, rotatable
4
Display, rotatable
5
Pushbutton [B]
6
[Edit] key
7
Pushbutton [A]
8
Electrical connection

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Product overview
7
4.1.2 Display components
1
2 2
3
4
56
Fig. 2: LCD display
1
Bar graph for input signal InA
2
Output display
3
Main display, e. g. measured value
4
Bar graph for input signal InC or InD
5
Lower display, e.g. unit
6
Status information/input display
Symbols on the display
Example for
LCD display
Meaning
Output display
‘OutA’ Switching output OutA selected, flashes with active IO-Link
‘OutA’ Switching output OutA set
‘OutC’ Switching output OutC selected
‘OutC’ Switching output OutC set
‘OutB’ Switching output OutB selected
‘OutB’ Switching output OutB set
‘OutD’ Analogue output OutD selected
‘OutD’ Switching output OutD set
Information/input display
Input signal InA: graphic display of the current measured value related to the
maximum measured value of the measuring range
Input signal InC: graphic display of the volume measurement
‘InA’ Input signal InA selected
‘InC’ Input signal InC selected

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Product overview
Example for
LCD display
Meaning
‘InB’ Input signal InB selected
‘Lock’ Security code activated
‘Spec’ Special menu activated
Tab. 2: Symbols on the display
Example for LCD display Meaning
Main display Lower display
Measured value indicator and unit in the RUN mode
‘17.3’ ‘l/min’ Measured value indicator and unit
Menu for the switching outputs
‘Edit’ ‘Flow’ Edit menu for the switching outputs
_I¯ ‘Fctn’ Setting the switching function: threshold value comparator
_I¯I_ ‘Fctn’ Setting the switching function: window comparator
‘18.0’ ‘SP’ Value of switching point, only for threshold value compa-
rator
‘8.0’ ‘SP.Lo’ Value of lower switching point, only for window comparator
‘12.2’ ‘SP.Hi’ Value of upper switching point, only for window comparator
‘2.8’ ‘HY’ Hysteresis value
‘N/O’ ‘logic’ Switching characteristics of the switching outputs:
‘NO’ = N/O contact, ‘NC’ = N/C contact
‘bLUE’ ‘COLR’ Display colour:
‘bLUE’ = blue, colour change function deactivated
‘R.ON’ = red when switching output set
‘R.OFF’ = red when the switching output not set
‘200’ ‘PULS’/‘MSEC’ Width of the volume pulse
Menu for the analogue output
‘l/min’ ‘Flow’/‘Unit’ Display unit for the flow measurement
‘1_5V’ ‘Out’ Analogue output, switchable between ‘0_10V’, ‘1_5V’,
‘4_20MA’
‘93.0’ ‘In.Hi’/‘%’ Scaling of the analogue output: set end value of the flow
rate characteristic or temperature characteristic, specified in
% FS
‘3.1’ ‘In.Lo’/‘%’ Scaling of the analogue output: set start value of the flow
rate characteristic or temperature characteristic, specified in
% FS

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Product overview
9
Example for LCD display Meaning
Main display Lower display
‘Ltr’ ‘VOL’/‘Unit’ Display unit for volume measurement
‘°C’ ‘tEMP’/‘Unit’ Display unit for temperature measurement
Menu for extreme values and mean values
‘5.1’ ‘MIN’/‘l/Min’ Minimum measured flow rate since switch-on or the last
reset
‘30.8’ ‘MAX’/‘l/Min’ Maximum measured flow rate since switch-on or the last
reset
‘20.2’ ‘MIN’/‘°C’ Minimum measured temperature since switch-on or the last
reset
‘50.5’ ‘MAX’/‘°C’ Maximum measured temperature since switch-on or the last
reset
‘20.8’ ‘AVER’/‘l/Min’ Average of the flow measurement, filter time constant
switchable between 650 ms, 1200 ms, 2500 ms
Menu for the device settings in the special menu
‘1200’ ‘Filt’ Value of the filter time constant for the flow rate measure-
ment signal
‘10’ ‘Eco’ Economy mode: time after which the display background
lighting is switched off
‘PNP’ ‘bin’/‘Out’ Switchover of the switching outputs between PNP and NPN
‘FLOW’ ‘bin’/‘Pin4’ Switchover of the switching signal at pin 4 between flow
monitoring and volume pulse
‘FLOW’ ‘bin’/‘Pin2’ Switchover of the switching signal or the analogue output
signal at pin 2 between flow rate and temperature moni-
toring
‘FLOW’ ‘ANLG’/‘Pin5’ Switchover of the analogue output signal at pin 5 between
flow measurement and temperature measurement
‘OFF’ ‘Lock’/‘Code’ Activation and specification of the security code
‘OFF’ ‘MASt’ Activation of the IO-Link master function for replication of
parameters
Tab. 3: Example for LCD display

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Product overview
4.2 Function
4.2.1 Operating statuses
Operating status Function
RUN mode –Basic state after the operating voltage has been applied.
–Display of the current measured value.
–Display of the selected inputs and outputs.
–Switchover between the measured variables of flow rate, volume and
temperature.
SHOW mode –Display of current settings of the switching outputs and analogue
output.
–Display and reset of the minimum and maximum values.
EDIT mode –Setting or modification of parameters.
TEACH mode –Acceptance of the current measured value to specify switching points.
RECORDER mode –Manual measurement of the accumulated volume.
Tab. 4: SFAW operating statuses
4.2.2 Switching outputs
4.2.2.1 Switching functions
Threshold value comparator in the flow measurement for OutA or OutD and in the temperature
measurement for OutB
Function Normally open contact (N/O) Normally closed (N/C contact)
Switching function:
–1 switching point (SP)
TEACH mode1):
–2 teach points (TP1, TP2)
–SP = ½ (TP1 + TP2)
1) Only with flow measurement
Tab. 5: Threshold value comparator: setting of switching point SP and hysteresis HY

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Product overview
11
Window comparator in the flow measurement for OutA or OutD and in the temperature measurement
for OutB
Function Normally open contact (N/O) Normally closed (N/C contact)
Switching function:
–2 switching points
(SP.Lo, SP.Hi)
TEACH mode1)2):
–2 teach points (TP1, TP2)
–TP1 = SP.Lo, TP2 = SP.Hi
1) Only with flow measurement
2) SP.Lo = smaller value, SP.Hi = larger value, independent of the Teach sequence
Tab. 6: Window comparator: setting of switching points SP.Lo and SP.Hi and hysteresis HY
4.2.2.2 Colour change
A red colour change can be set in the display for OutA, OutB and OutD dependent on the switching
status. The colour changes enables the system status to be identified from a distance.
The display always shows the measured variable that first caused the colour change. The unit and
the associated OutA, OutC or OutD output flash in the lower display. The display remains red until all
switching outputs are in the ‘blue’ status again.
4.2.2.3 Volume pulse
A threshold value for the volume is set in the cumulative volume measurement. If the configured
threshold value is reached, a switching impulse is emitted at the OutC output for a configurable
period. The volume measurement is restarted at every switching pulse.
Setting of N/O contact (NO) Setting N/C contact (NC)
Tab. 7: Volume pulse with accumulated volume measurement
4.2.3 Analogue output OutD
Analogue signal
The signal of the analogue output can be assigned the physical measured variables of flow rate or
temperature. The physical measured value of flow rate is configured as standard.
Output signal
The analogue output can be configured either as voltage output 0 … 10 V oder 1 … 5 V or as current
output 4 … 20 mA. By default the voltage output is set to 0 … 10 V.

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Product overview
Scaling of the analogue signal
The default setting for the analogue output signal is 0 … 10 V, 1 … 5 V or 4 … 20 mA for the complete
sensing range "Full Scale (FS)". If only part of the sensing range is to be used, the analogue value
output can be scaled to the partial range.
Analogue signal scaled
Analogue signal not scaled
1 2
Fig. 3: Example: scaling of the analogue signal at
the current output
1
Starting point of the scaled sensing range
(In.Lo)
2
End point of the scaled sensing range (In.Hi)
4.2.4 Filter
The filter smoothes the flow rate measurement signal. Smoothing takes place in 8 steps and affects all
outputs. The switching times of the flow-related switching outputs and the rise time and fall time of
the analogue output change.
4.2.5 Functional principle
The flow velocity is recorded in accordance with the vortex principle. The flow rate and the accumu-
lated volume are calculated from the flow velocity. An optional integrated temperature sensor records
the temperature of medium.
Interfacing to higher-level systems is provided by 2 switching outputs via an analogue output or an
IO-Link interface depending on the type.
The switching outputs can be configured to monitor a threshold value or a range. PNP or NPN and N/O
contact (NO) or N/C contact (NC) can be set for each switching output as required. The process values
can be read out and parameters changed and transmitted to additional devices through the IO-Link
interface.

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Product overview
13
Flow rate Q
Temperature T
analogue Q
analogue T
Volume pulse VP
Volume recorder V
binary Q/BDC1
binary VP/BDC3
binary T/BDC2
binary Q/BDC4
analogue Q/PDV1_2byte
analogue T/PDV2_2byte
analogue V/onReq_4byte
Q or VP
T or Q
Fig. 4: SFAW-…PNLK-PNVBA-… signal structure
Flow rate Q
Temperature T
analogue Q
analogue T
Volume pulse VP
Volume recorder V
binary Q/BDC1
binary VP/BDC3
binary T/BDC2
binary Q/BDC4
analogue Q/PDV1_2byte
analogue T/PDV2_2byte
analogue V/onReq_4byte
Q or VP
T or Q
Q or T
Fig. 5: SFAW-…PNLK-PN-VBA-… signal structure
4.2.6 Security code
A 4-digit numeric code can be set to protect the device settings from unauthorised access. The
security code must be entered in EDIT mode and TEACH mode when changing settings.
The IO-Link interface offers additional options for blocking access .

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Mounting
4.2.7 Minimum value and maximum value
The minimum values and the maximum values for the flow measurement or the temperature measure-
ment are displayed and reset in the SHOW mode.
The minimum and maximum values are reset when the operating voltage is switched off.
5Mounting
5.1 Inlet situation and outlet situation
The specified accuracies of the sensor are achieved if the inlet and outlet sections on the sensor are
sufficiently long and straight. In addition, the sensor should not have any disruptive geometries such
as edges, curves or tapering.
Before installation, observe the following conditions:
SFAW- 32-… 100-…
Inside diameter D of the flow sensor 11 mm 19 mm
Min. internal diameter of laminar flow inlet 1.1 x D 1.05 x D
Laminar flow inlet type 10 cm
Min. laminar flow outlet 5 cm
Tab. 8: Minimum requirements for fluid connection
Possible inlet situations
Tab. 9: Possible inlet situations

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Mounting
15
5.1.1 Mounting position/inflow
–The sensor is unidirectional and can therefore only provide meaningful measurement values in one
direction of flow. Flow in the opposite direction also actuates the paddle, but with many irregular
pulses. The defined relationship between the vortex frequency and the flow velocity no longer
exists. Values that appear plausible are still shown on the display.
–If the flow direction is correct, the mounting position is arbitrary.
–The specified accuracies are maintained with inlet sections that are as long and straight as possible.
–The inside diameter of the inlet section must not be smaller than the inside diameter at the sensor
measuring point.
–Vortices generated by external interfering bodies will influence the measurement result. External
sources of interference can be throttles, valves, pipe bends and double pipe bends. These addi-
tional superimposed vortices falsify the measurement result and should therefore be avoided in the
design.
In addition, air or air bubbles affect the measurement and lead to incorrect measurement results.
Air in the fluidic system is often caused by incorrect installation situations. The correct mounting
position must be observed and a back pressure that is not too low must be maintained.
The following table shows the correct and incorrect installation situations.

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Mounting
Correct installation situation Incorrect installation situation
Tab. 10: Correct and incorrect installation situations

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Mounting
17
1.
2.
1.
2.
5.2 Mounting
5.2.1 Installing sensor without mounting accessories
The mounting position is as desired.
Fig. 6: Direct mounting
Note hole pattern è Fig. 11.
Remove the locking plate.
–Screws: Allen key SW 2 mm
Mount the sensor with 4 M3 screws.
–Wall hole diameter: maximum 3.3 mm
–Tightening torque: maximum 0.5 Nm
5.2.2 Mounting sensor with wall mounting
The mounting position is as desired.
Fig. 7: Wall mounting SFAW-...-W-...
Note hole pattern è Fig. 12.
Remove the locking plate.
–Screws: Allen key SW 2 mm
Install the wall mounting on the sensor with 4 M3 screws.
–Tightening torque: maximum 0.5 Nm
5.3 Tubing sensor
The medium is fed in at fluid port 1 and removed at fluid port 2 è Fig. 1.

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Installation
3.
5.
1. Screw a supply line into the fluid port 1 of the sensor. Do not tilt the thread when screwing it in.
2. Screw in a drain line at fluid port 2 of the sensor. Do not tilt the thread when screwing it in.
Observe the dimensional drawing for the customer-specific fluid ports è Fig. 13.
5.4 Changing fluid connector
1. Remove the locking plate.
2. Remove the clamps and pull out the fluid connectors.
Insert new fluid connectors.
–Make sure the O-rings are seated correctly.
4. Insert the clamps and push them fully into the housing.
Mount the locking plate with 4 M3 screws.
–Tightening torque: maximum 0.5 Nm
6 Installation
6.1 Installation, electrical
WARNING
Risk of injury due to electric shock.
• For the electrical power supply, use only PELV circuits in accordance with IEC 60204-1/EN 60204-1
(Protective Extra-Low Voltage, PELV).
• Observe the general requirements of IEC 60204-1/EN 60204-1 for PELV circuits.
•Only use voltage sources that ensure a reliable electric separation from the mains network in
accordance with IEC 60204-1/EN 60204-1.

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Commissioning
19
•
The switching outputs at pin 2 and pin 4 can be wired as PNP or NPN connections.
• Pay attention to the wiring when configuring the switching outputs è 7.3.4 Changing sensor
settings.
Connect the sensor.
–Maximum permissible cable length: 30 m, with IO-Link 20 m
–Plug tightening torque: maximum 0.5 Nm
Plug Pin Allocation1) Wire colour
5-pin M12 1 +24 V DC operating voltage Brown (BN)
2 Switching output OutB or OutD or analogue output White (WH)
3 0 V Blue (BU)
4 Switching output OutA or OutC or IO-Link (C/Q line) Black (BK)
5 Analogue output or not assigned Grey (GY)
1) Observe signal structures.
Tab. 11: Pin allocation
Circuit diagrams
SFAW-…-PNLK-PNVBA-… SFAW-…-PNLK-PN-VBA-…
Tab. 12: Circuit diagrams
7Commissioning
7.1 Switching on the sensor in RUN mode
The basic state of the sensor is the RUN mode. The current values are displayed.
The basic state can be reached from other modes:
–Press and hold the [Edit] key for 3 seconds.
–After a monitoring time has elapsed (Timeout).
1. Switch on the operating voltage.
ÄThe sensor is in RUN mode.
ÄThe signals active at the outputs are displayed è 4.2.5 Functional principle.

20
Festo — SFAW — 2022-09c
Commissioning
2. Press the [A] or [B] key to switch between the flow rate, volume and temperature measured
variables è Fig. 8.
7.2 Displaying parameters in SHOW mode
Requirement: the sensor is ready for operation è 7.1 Switching on the sensor in RUN mode.
Measured value indicator (Run mode)
Measured value indicator (Run mode)
or
or
or
or
or
Fig. 8: Menu structure SHOW mode