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SFAB
Flow sensor
Festo SE & Co. KG
Ruiter Straße 82
73734 Esslingen
Deutschland
+49 711 347-0
www.festo.com
Operating instructions
8156241
2021-05d
[8156243]
Translation of the original instructions
© 2021 all rights reserved to Festo SE & Co. KG
1 About this document
1.1 Applicable Documents
All available documents for the product
è www.festo.com/sp.
2 Safety
2.1 General safety instructions
–Only use the product in original status without unauthorised modifications.
–Only use the product if it is in perfect technical condition.
–Observe labelling on the product.
–Condensation, oil mist, foreign matter and other contaminants in the com-
pressed air can damage the product. Only use media in accordance with the
specifications Technical data.è
–This product can generate high frequency malfunctions, which may make it nec-
essary to implement interference suppression measures in residential areas.
2.2 Intended use
The SFAB is designed to monitor changes in the flow rate and air consumption of
gaseous media in piping systems or terminals 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 qualified personnel have skills and
experience in dealing with electropneumatic (open-loop) control technology.
2.4 Range of application and approvals
Certain configurations of the product have been certified by Underwriters Labora-
tories Inc. (UL) for the USA and Canada. These configurations bear the following
mark:
Fig.1
UL Recognized Component Mark for Canada and the United States. Only for
connection to an NEC Class 2 supply. Raccorder Uniquement a un circuit de Classe
2.
Observe the following if the UL requirements are to be complied with in your
application:
• Regulations for complying with the UL certification can be found in the sepa-
rate UL-specific special documentation. The technical data listed there take
priority.
• The technical data in this documentation may show values deviating from this.
3 Additional 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 Product design
1
2
3
4
5
6
7
8
9
Fig. 2: SFAB
1 Supply port 1
2 Display
3 B pushbutton
4 Edit button
5 A pushbutton
6 Plug for the electrical connection
(M12)
7Hole for plate mounting
8 Supply port 2
9 Mounting slide for H-rail and wall
mounting (rear)
4.2 Functional principle
The SFAB uses a thermal measurement method. Here, the amount of heat drawn
from a heated surface of the sensor by the medium flowing past it is calculated.
Through the amount of heat removed, the flow rate or accumulated air consump-
tion is determined and shown on the display. The connection to higher-level
systems is implemented through 2 binary outputs (Out A/OutB) and one analogue
output. Switching points can be defined for both binary outputs. Switching points
for both binary outputs are possible for flow rate measurement, a consumption
switching pulse for output A (OutA) is possible for cumulative air consumption
measurement. The combination of cumulative air consumption measurement
(OutA) and flow rate measurement (OutB) is possible. The flow value is output
via the analogue output.
5 Assembly
5.1 H-rail (manifold assembly)
1. Maintain lateral distance x = 10 mm to earthed surfaces.
2. Hang SFAB in H-rail.
3. Press SFAB in the direction of the arrow.
ÄSFAB snaps into place.
5.2 Wall mounting
1. Maintain lateral distance x = mm to earthed surfaces.
2. Fasten the adapter plate with 2 screws M3.
3. Hang the SFAB in the adapter plate.
4. Press SFAB in the direction of the arrow.
ÄSFAB snaps into place.
5.3 Plate mounting
1. Maintain lateral distance x = mm to earthed surfaces.
2. Fasten SFAB with washers and 2 screws M4.
–Tightening torque: 1 Nm
5.4 Rotate display
The display can be rotated in 90° steps. The turning range is limited to approx.
270° by a stop.
Fig. 3: Rotate display
6 Installation
6.1 Pneumatic installation
• Mount the hoses to port 1 and port 2 (flow direction marked on theè
product).
If the tubing is incorrect, the measured values are shown flashing on the display.
6.2 Electrical installation
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.
1. Use signal lines that are shorter than 10 m.
2. Configure binary outputs according to the wiring.
–Tightening torque for the union nut at the plug: max. 0.5 Nm
Pin Wire colour
1)
Allocation Plug
1 Brown (BN) Operating voltage
+24 V DC
M12, 5-pin
2 White (WH) Binary output B (OutB)
3 Blue (BU) 0 V
4 Black (BK) Binary output A (OutA)
5 Grey (GY) Analogue output C
1) When using the connecting cable from the accessories.
Tab. 1: Pin allocation
Circuit diagrams
SFAB-...-2SA SFAB-...-2SV
I
qBN +24 V
1
WH
BK
BU 0 V
GY RL
PNP/NPN
4
2
5
3
qBN +24 V
1
WH
BK
BU 0 V
GY RL
PNP/NPN
U
4
2
5
3
Tab. 2: Circuit diagrams
7 Commissioning
1. Switch on operating voltage.
ÄSFAB is in RUN mode.
2. Define the switching behaviour of the binary outputs.
–For flow measurement [FLW]: switching points [SP] and hysteresis [Hy]
–For cumulative air consumption measurement [ConS] with OutA only: con-
sumption switching impulse [CI]
7.1 Switching outputs
7.1.1 Switching functions
7.1.1.1 Threshold value comparator in the flow rate measurement for OutA or
OutB
Function NO (normally open) NC (normally closed)
Switching function:
–1 switching point (SP)
TEACH mode:
–2 teach points (TP1, TP2)
Tab. 3: Threshold value comparator
7.1.1.2 Window comparator in the flow rate measurement for OutA or OutB
Function NO (normally open) NC (normally closed)
Switching function:
–2 switching points (SP.Lo,
SP.Hi)
TEACH mode:1)
–2 teach points (TP1, TP2)
–TP1 = SP.Lo, TP2 = SP.Hi
1) SP.Lo = smaller value, SP.Hi = larger value, independent of the teach sequence
Tab. 4: Window comparator
7.1.1.3 Consumption switching pulses [CI] for cumulative air consumption
measurement for OutB
A threshold value for air consumption can be set with the consumption switching
impulse [CI]. If the set threshold value is reached, a switching impulse is emitted
at the output Out A for 100 ms. With each switching impulse, measurement of the
air consumption is started again.
Setting NO (N/O (normally open) con-
tact)
Setting NC (N/C (normally closed)
contact)
Tab. 5: Consumption switching pulses
7.2 Display components
Symbol Description
OutA/OutB Switching output A/switching output B
Lock Security code active (blocked against unauthorised programming)
Run Accumulated air consumption measurement is active in RECORDER
mode
Option Sensor is set to a standard condition that differs from the factory
setting
Stop Air consumption measurement stopped
Switching output set/not set
Threshold value comparator
Window comparator
Air consumption switching mode (consumption – only for OutA)
Pulse for accumulated air consumption (consumption impulse)
Switching point
Lower switching point (switching point - low)
Upper switching point (switching point - high)
Hysteresis
N/O contact (normally open)
N/C contact (normally closed)
Switching mode flow rate (flow - only for OutA)
Minimum flow rate (flow low)
Maximum flow rate (flow high)
Special menu
Analogue filter
Digital filter
Display red with switching status ON and/or logic 1
Display red with switching status OFF and/or logic 0
Positive switch output
Zero switch output
Segments are lighted: graphic display of the current measured value
related to the maximum measured value of the measuring range
Running light (1 segment): air consumption measurement for OutA or
RECORDER mode active
3 segments flash: hysteresis value is displayed
1 segment flashes:
–Segment 6: switching point SP or SP.Lo is displayed
–Segment 8: switching point SP.Hi is displayed
–Segment 1: min. flow rate (F.Lo) is displayed
–Segment 10: max. flow rate (F.Hi) is displayed
Tab. 6: Symbols on the display
7.3 Preparing commissioning
The product in basic status is in RUN mode. The current measurement values are
displayed. The basic status can be reached from other modes by:
–Pressing Edit button for 3 seconds
–Expiration of monitoring time, timeout
1. Switch on operating voltage.
ÄThe SFAB is in RUN mode.
2. Check the SFAB settings
è 7.6 SHOW mode.
7.4 Symbols for representing the menu structure
Symbol Description
Automatic return to the basic status (RUN mode) when the monitoring
time has expired (here 80 seconds)
In order to return manually to the basic status (RUN mode), press the
EDIT button for 3 seconds.
Generate flow rate (for teaching the measured value - here Flow 1)
The symbol on the display flashes (here OutB)
Security code active (lock - blocked against unauthorised program-
ming)
Security code inactive (lock)
Press key (here A key).
Press A key or B key. SFAB switches to the setting indicated by the
arrows.
Press A and B keys simultaneously.
Press key (here A key) and EDIT button simultaneously.
Press A key or B key to set the desired value.
Display for a value or switching point. Value can be set.
Symbol Description
Press the Edit button.
Branching in the menu
Tab. 7
7.5 RUN mode
The following values are displayed in RUN mode:
–Measurement values for the flow rate (in l/min, scfm or l/h)
–Measurement values for air consumption (in m³, scf or l)
–Signal states of the switching outputs OutA, OutB (set, not set)
If the measured value display flashes, one of the following errors has occurred:
• Measured value outside the permissible measuring range
• Incorrect tubing è 6.1 Pneumatic installation
7.6 SHOW mode
In SHOW mode, the current settings for the switching outputs Out A and Out B are
displayed.
The SFAB must be in RUN mode.
• To start the SHOW mode for the respective switching output, press the A key
(OutA) or B key (OutB).
If there are errors, the corresponding error numbers are displayed first after
pressing the A / B pushbutton.
• To display the settings one by one, press the A/B pushbutton repeatedly.
When all settings have been displayed, the SFAB goes back into RUN mode when
the A pushbutton / B pushbutton are pressed again and displays the current
measurement value for the corresponding output.
Thus, the SHOW mode can also be used to switch the display, e. g. to switch
between the displayed measured values for a combination of air consumption
measurement and flow rate measurement.
The following settings will be displayed for outA:
–With flow measurement [FLW]:
–Switching function [threshold value or window comparator]
–Switching point [SP], Switching points [SP.Lo] and [SP.Hi]
–Hysteresis [Hy]
–Switching element function [no/nc] (N/O contact/N/C contact)
–Minimum flow rate [F.Lo] (flow low)
–Maximum flow rate [F.Hi] (flow high)
To delete the minimum or maximum value, press the EDIT button.
–For air consumption measurement [ConS]:
–Air consumption switching impulse [CI]
–Switching element function [no/nc] (N/O contact/N/C contact)
–Minimum value flow rate [F.Lo]
–Maximum value flow rate [F.Hi]
To delete the minimum or maximum value, press the EDIT button.
The following settings will be displayed for OutB:
–Switching function [threshold value or window comparator]
–Switching point [SP], Switching points [SP.Lo] and [SP.Hi]
–Hysteresis [Hy]
–Switching element function [no/nc] (N/O contact/N/C contact)
–Status colour change [bLUE/rON/rOFF]
–Minimum value flow rate [F.Lo]
–Maximum value flow rate [F.Hi]
To delete the minimum or maximum value, press the EDIT button.

Produktspecifikationer

Varumärke: Festo
Kategori: Inte kategoriserad
Modell: SFAB-1000U-WQ10-2SA-M12

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