Festo SFAM-62-***-T User manual

en Operating
instructions
8078141
2017-09c
[8068109]
Flow Sensor
SFAM

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Original instructions
SFAM-EN
Identification of hazards and instructions on how to prevent them:
Danger
Immediate dangers which can lead to death or serious injuries
Warning
Hazards that can cause death or serious injuries
Caution
Hazards that can cause minor injuries
Other symbols:
Note
Material damage or loss of function
Recommendations, tips, references to other documentation
Essential or useful accessories
Information on environmentally sound usage
Text designations:
 Activities that may be carried out in any order
1. Activities that should be carried out in the order stated
– General lists
èResult of an action/References to more detailed information

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English – Flow Sensor SFAM
Table of contents
1 Product description 5.......................................................
1.1 Overview 5................................................................
1.2 Characteristics 6...........................................................
1.3 Factory settings 7...........................................................
2 Function and application 7...................................................
2.1 Operating statuses 8........................................................
2.2 Function range 9...........................................................
2.2.1 Switching outputs 9................................................
2.2.2 Change in colour 10..................................................
2.2.3 Standard conditions 10...............................................
2.2.4 Analogue filter 11...................................................
2.2.5 Digital filter 11......................................................
2.2.6 Security code 11....................................................
2.2.7 Min/max values 11..................................................
3 Requirements for product use 12...............................................
4 Installation 13..............................................................
4.1 Mechanical/pneumatic installation 13...........................................
4.2 Electrical connection 14.......................................................
5 Commissioning 15...........................................................
5.1 Symbols on the display 15.....................................................
5.2 Symbols for representing the menu structure 16...................................
5.3 RUN mode 17...............................................................
5.4 INFO/SHOW mode 18........................................................
5.5 EDIT mode 20...............................................................
5.5.1 Start EDIT mode 20..................................................
5.5.2 Setting the switching characteristics of the switching outputs 21.............
5.5.3 Set special menu [SPEC] 22............................................
5.6 TEACH mode 24.............................................................
5.7 RECORDER mode 25.........................................................

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6 Operation 26...............................................................
7 Maintenance and care 26.....................................................
8 Disassembly 27.............................................................
9 Fault clearance 27...........................................................
10 Accessories 27..............................................................
11 Technical data 28............................................................

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1 Product description
For all available product documentation èwww.festo.com/pk
1.1 Overview
6
SFAM-62- … -M
1
2
3
4
5
7
SFAM-62- … -T
5
6
8
6
SFAM-90- … -M
1
2
3
4
5
7
SFAM-90- … -T
5
6
8
1Display
2B pushbutton
3Edit button
4A pushbutton
5Plug for electrical connection
6Supply port
7Laminar flow cartridge
8Stabilizing zone
Fig. 1 Operating elements and ports

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1.2 Characteristics
Feature Order
code
Specification
Type SFAM Flow sensor
Grid dimension -62 62 mm
-90 90 mm
Flow measuring range -10001) Max. 1000 l/min
-30001) Max. 3000 l/min
-5000 Max. 5000 l/min
-100002) Max. 10000 l/min
-150002) Max. 15000 l/min
Flow input LUnidirectional from left
RUnidirectional from right
Type of mounting -M Manifold assembly
-T Threaded mounting
-W1) Threaded mounting with wall fastener
Pneumatic connection G121) G½
N121) ½” NPT
G12) G1
N12) 1” NPT
G1122) G1½
N1122) 1½” NPT
Electrical output -2SA 2x PNP or NPN, 1 analogue output 4 … 20 mA
-2SV 2x PNP or NPN, 1 analogue output 0 … 10 mA
Electrical connection -M12 Plug connector; M12x1, 5-pin; A-coded
Electrical accessories3) -2.5S Connecting cable, straight socket, cable length 2.5 m
-5S Connecting cable, straight socket, cable length 5 m
-2.5A Connecting cable, angled plug socket, cable length 2.5 m
-5 A Connecting cable, angled plug socket, cable length 5 m
1) Only SFAM-62
2) Only SFAM-90
3) Included in the scope of delivery.
Tab. 1 Overview of variants

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1.3 Factory settings
Settings Menu item Value/function
[SPEC]
Standard conditions [Option] OFF (=DIN 1343)
Physical unit for flow rate [FLW] l/min
Filter time constant [AnA.F] A.60
Digital filter [diG.F] d.2
Physical unit for consumption [ConS] l
Switching output PnP
Security code [lock] OFF
[OutA]
Measured variable FLW (flow rate)
Switching function [Threshold value comparator]
Switching point [SP] 40 % FS
Hysteresis [Hy] 2 % FS
Switching element functions NO (normally open contact)
Consumption switching impulse [Ci] 30 l at FS = 1000 l/min
100 l at FS = 3000 l/min
150 l at FS = 5000 l/min
300 l at FS = 10000 l/min
500 l at FS = 15000 l/min
[OutB]
Switching function [Threshold value comparator]
Switching point [SP] 60 % FS
Hysteresis [Hy] 2 % FS
Switching element function NO (normally open contact)
Change in colour of display Blue (function deactivated)
Tab. 2 Factory settings
2 Function and application
The SFAM is designed to monitor changes in the flow rate and air consumption/air volume for suitable
media in piping systems or terminals in industry; for suitable media èChapter 11 Technical data.
Thedesign enables stand-alone operation of (SFAM-…-T) or assembly with service units of the MS
series (SFAM-…-M).
Measurement is carried out by means of a thermal procedure. 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 consumption is determined and shown on the display. The
connection to higher-level systems is implemented through 2 binary outputs (Out A/B) and one
analogue output (Out C). The switching points for both binary outputs are adjustable for flow rate
measurement. To measure air consumption, a consumption switching impulse is adjustable for output

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A (Out A). The combination of air consumption measurement (Out A) and flow rate measurement
(Out B) is possible. The flow rate value is passed on via the analogue output (Out C).
2.1 Operating statuses
INFO mode EDIT mode TEACH mode RECORDER mode
SHOW mode
Fig. 2 SFAM operating statuses
RUN mode
In the RUN mode, the following are displayed:
– the measurement values for the flow rate (in l/min or scfm)
– the measurement values for air consumption (in m³, scf or l) and
– the signal statuses of the switching outputs Out A, Out B (set, not set).
INFO mode
In INFO mode, when air consumption measurement is active, the display of input variables (flow rate,
air consumption) can be switched quickly in the display. The display can be switched by pressing the
Apushbutton or B pushbutton.
SHOW mode
In SHOW mode, the current settings for the switching outputs Out A and Out B, as well as the
min/maxvalues for the flow rate or air consumption measurement, are displayed. The min/max values
can be reset.
EDIT mode
In EDIT mode, the settings for the flow sensor (switching outputs, standard condition, physical unit,
etc.) can be made or changed.
TEACH mode
In TEACH mode, the switching points can be taught.

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RECORDER mode
In the RECORDER mode, a manual air consumption measurement can be performed.
2.2 Function range
2.2.1 Switching outputs
Configuration of the switching outputs
Switching output Out A:
This can be done either with the physical input variable flow rate [FLW] or the air consumption
measurement [ConS] derived from it.
Switching output Out B:
can only be used with the physical input variable flow rate.
Switching outputs Out A/Out B can be configured according to the setting range in the technical data
èTab. 13.
For the switching output Out A and Out B, the switching function threshold value or window comparator
can be selected independently of one another. Each switching output can have the switching element
function N/C contact (NC – normally closed) or N/O contact (NO – normally open) separately allocated
toit èTab. 3.
Switching points [SP] and hysteresis [HY] can be set corresponding to the setting ranges in the
technical data table èTab. 13.
Switching point and hysteresis with flow rate measurement for Out A/Out B
Threshold value comparator Window comparator
Switching element function NO (normally open contact)
q
1
0
HY
OUT
SP [l/min.]
HY HY
q
1
0
OUT
SP Lo SP Hi
[l/min.]
Switching element function NC (normally closed contact)
q
1
0
SP
HY
OUT
[l/min.] q
1
0
OUT
SP Lo SPHi
HY HY
[l/min.]
Tab. 3 Switching point SP and hysteresis Hy setting

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Consumption switching impulse [CI] with air consumption measurement
Setting NO (normally open) Setting NC (normally closed)
CI CI
t
t
0
Out A
1
0
CI
100 ms
[l],
[m³]
CI CI
t
t
0
Out A
1
0
CI
100 ms
[l],
[m³]
Tab. 4 Consumption switching impulse
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.
2.2.2 Change in colour
A red colour change can be set for Out B, dependent on the switching status. This allows the system
status to be seen across large distances.
The following settings can be chosen:
r.On = Display is red when the switching output is High (1).
Display is blue if the switching output is Low (0).
r.OFF = Display is red when the switching output is Low (0).
Display is blue if the switching output is High (1).
bLUE = Display is always blue; the colour change function is switched off.
2.2.3 Standard conditions
The air mass flow measured and output by the SFAM refers to standard conditions. The SFAM is
calibrated at the factory to the physical standard conditions in accordance with DIN 1343 and the unit
l/min.
Note
If standard conditions and/or other units that deviate from the calibrated measurement
range with the unit l/min are used, there are corresponding characteristiclimits for the
analogue output èTab. 16 in Chapter 11 Technical data.

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The following standard conditions can be selected in the menu item [Option] èChapter 5.5.3 Set
special menu [SPEC].
Option Off 1 2
Standard litres as per DIN 1343 ISO 2533 ISO 6358
Air pressure (absolute) [bar] 1.01325 1.01325 1
Air pressure (absolute) [kPa] 101.325 101.325 100
Temperature [°C] 0 15 20
Tab. 5 Standard conditions
2.2.4 Analogue filter
With the analogue filter, the filter time constant of all output signals can be changed. This changes the
rise time at the analogue output (èFig. 3 ).
2.2.5 Digital filter
The display values can be smoothed with the digital filter. The degree of smoothing can be set in
6steps from d1 = low smoothing to d6=maximum smoothing. With increasing smoothing, the
switch-on/switch-off time of the switching outputs rises. In case of d.Off, the switching times depend
only on the set filter time constant of the analogue filter (èFig. 3).
Signal flow from the analogue filter and digital filter
Sensor
Raw signals
Analogue
filter
Digital filter Display
Switching
outputs
Out A/Out B
Analogue
output
Fig. 3 Signal flow from the analogue filter and digital filter
2.2.6 Security code
To protect the setting from unauthorized access, a numerical code of up to 4 digits can be set.
Thesecurity code must be entered each time the settings are changed (EDIT mode and TEACH mode).
2.2.7 Min/max values
In SHOW mode, the min/max values for a flow rate measurement or an air consumption measurement
can be shown and reset èChapter 5.4.
Note
Switching off the supply voltage resets the min/max values.

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3 Requirements for product use
Warning
Depending on the functioning of the machine/system, manipulation of signal statuses
may cause serious personal injury.
 Note that if the switching characteristics of the outputs are modified in Edit mode,
the new characteristics will become effective immediately.
 Enable the password protection option (security code) to prevent accidental
alteration by an unauthorised third party èChapter 5.5.3, section “Setting the
security code”.
Warning
Use of the product in combination with prohibited media can result in personal injury.
 Do not use the product in conjunction with inflammable gases, corrosive gases,
oxygen, etc. The product is intended only for measuring the flow rate of the media
listed as suitable in Chapter 11 Technical data.
Caution
Condensation water, oil mist, foreign matter and other dirt in the compressed air can
damage the product and cause incorrect measurements and malfunctions.
 Make sure that the specified air quality class is maintained for the operating
medium èChapter 11 Technical data.
Note
The product is suitable for use only for industrial purposes.
In residential areas, measures for radio interference suppression may be necessary. It is
not suitable for commercial invoicing, such as for measurement of air consumption in
public utilities.
 Compare the limit values specified in these operating instructions with those of your actual
application (e.g. operating media, pressures, forces, torques, temperatures, loads, speeds,
operating voltages, flow rates).
 Take the ambient conditions at the location of use into consideration.
 Remove all transport packing, such as protective wax, foils (polyamide), caps (polyethylene),
cardboard boxes (except for the sealing elements of the pneumatic connections).
The material used in the packaging has been specifically chosen for its recyclability (exception:
oiled paper = residual waste).
 Use the product in its original status. Unauthorised modification is not permitted.

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4 Installation
4.1 Mechanical/pneumatic installation
The mounting position is horizontal ±5 %. Mount the SFAM as follows:
Fig. 4 Mechanical/pneumatic installation
Note
Information about mounting of the module connector, sub-base and mounting bracket
(mounting bracket only for SFAM-62) can be found in the operating instructions
enclosed with the relevant accessories.
The air mass flow is routed to the connection at which the laminar flow cartridge (for SFAM-…-M) or the
stabilising zone (for SFAM-…-T/-W) is located. The air mass flow is taken from the opposite connection
(èFig. 4).
Minimum requirements of pneumatic connection
Depending on the grid dimension, the following minimum requirements are to be observed for the
pneumatic connection:
SFAM MS series pneumatic connection Internal supply line diameter
[mm]
-62 ½” 10
-90 ¾” 20
Tab. 6 Minimum requirements of pneumatic connection
Assembly with MS series service units
When assembled with an existing service unit of the MS series:
1. Observe the flow direction.
2. Install the SFAM only after installing service units which conform to the degree of filtration (air
quality class 7.4.4.: 40 μm residual dust, +3 °C pressure dew point, 1 mg/m³ residual oil content).

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Note
The compressed air must not contain ester oils.
Note
The SFAM must not be installed directly behind a pressure regulator or filter regulator to
comply with the specified accuracies.
 After the filter regulator MS…-LFR or pressure regulator MS…‐LR , build a branching
module upstream of SFAM.
– Grid dimension 62: MS…-FRM-½
– Grid dimension 90: MS…-FRM-¾
3. Place the module connectors type MS…-MV in the slots of the individual devices. Accordingly, a seal
is required between the individual devices.
4. Fasten the module connectors type MS…-MV with 2 screws.
4.2 Electrical connection
Warning
Only use power sources which guarantee reliable electrical isolation of the operating
voltage according to IEC/DIN EN 60204-1. Also observe the general requirements for
PELV power circuits according to IEC/DIN EN 60204-1.
Switched-mode power supplies are permitted, provided that they ensure reliable
separation in accordance with EN 60950/VDE 0805.
Note
Long signal lines pick up more interference.
 Make sure that the signal lines are always shorter than 30 m.
Note
The binary outputs at pin 2 and pin 4 can be wired as PNP or NPN connections as
needed.
 Make sure that you also configure the binary outputs according to your wiring
èChapter 5.5.3.

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 Wire the SFAM as follows:
Pin Allocation Core colours1) Plug connectors2)
1+24 V DC operating voltage Brown (BN) 5-pin M12
5
2
3
4
1
2Binary output B (Out B) White (WH)
30 V Blue (BU)
4Binary output A (Out A) Black (BK)
5Analogue output C (Out C)3) Grey (GY)
1) Using the connecting cable from the electrical accessories èChapter 1.2 Key features
2) Tightening torque for the union nut at the plug connector is max. 0.5 Nm.
3) Voltage U or current I èChapter 11 Technical data
Tab. 7 Pin allocation
Circuit diagrams
SFAM-…-2SA SFAM-…-2SV
Tab. 8 SFAM circuit diagrams
5 Commissioning
5.1 Symbols on the display
Symbols Description
Out A/Out B 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 The sensor is set to a standard condition that differs from the factory setting.
èChapter 5.5.3 Setting standard conditions [option] section
Stop Reset air consumption measurement value
Switching output set/not set
Threshold value comparator
Window comparator
Air consumption switching mode (consumption – only for Out A)

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Symbols Description
Trigger level for consumption switching impulse (consumption impulse)
Switching point
Lower switching point (switching point – low)
Upper switching point (switching point – high)
Hysteresis
Contact (normally open)
Contact (normally closed)
Switching mode flow rate (flow – only for Out A)
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 (for Out B)
Display red with switching status OFF and/or logic 0 (for Out B)
Positive switch output
Zero switch output
Segments illuminated: 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 Out A 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. 9 Symbols on the display
5.2 Symbols for representing the menu structure
Symbol Significance
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)

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Symbol Significance
The symbol on the display flashes (here: Out B)
Security code active (lock – blocked against unauthorised programming)
Security code inactive (Lock)
Press pushbutton (here: A pushbutton).
Press the A pushbutton or B pushbutton. The SFAM then switches to the setting
indicated by thearrow.
Press the A pushbutton and B pushbutton simultaneously
Press pushbutton (here A pushbutton) and the EDIT button simultaneously
Press A pushbutton or B pushbutton and thus set the desired value
A momentary display (here [ANA.F]) means that a value can be displayed.
Display for a value or switching point. Value can be set.
Press the Edit button
Branch in the menu
The setting last selected in the EDIT mode is indicated in the SHOW mode
Tab. 10 Symbols for representing the menu structure
5.3 RUN mode
In the basic status, the product is in RUN mode. The current measured value is displayed. The basic
status can be reached from other modes by:
– Pressing the Edit button for 3 seconds or
– Expiration of a monitoring time, timeout
In the RUN mode, the following are displayed:
– the measurement values for the flow rate (in l/min or scfm)
– the measurement values for air consumption (in m³, scf or l) and
– the signal statuses of the switching outputs Out A, Out B (set, not set).
1. Switch on the operating voltage.
The SFAM is in RUN mode.
2. Check the SFAM settings èChapter 5.4 SHOW mode.
Note
A flashing value means that the value was measured outside the permissible
measuringrange.

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5.4 INFO/SHOW mode
1) INFO mode only possible when consumption measurement is active
Fig. 5 SHOW mode

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In Show mode, depending on whether the A or B pushbutton is pressed, the current settings for the
switching outputs Out A or Out B will be shown.
The SFAM must be in RUN mode.
 When air consumption measurement is activated, the INFO mode enables rapid changeover of the
input variables flow rate and air consumption in the display by pressing the A or B pushbutton.
Note
If there are errors, pressing the A pushbutton/B pushbutton first displays
corresponding error numbers.
 Repeated pressing of the A pushbutton/B pushbutton displays the settings of the respective
switching output one after another.
 At the end of SHOW mode, the min value [F.Lo] and max value [F.Hi] are displayed. If no further
buttons are pressed, the display remains constant (no timeout). The min and/or max display is
thereby signaled by the flashing of segment 1 or segment 10 in the bar graph èTab. 9.
 The min/max values can be reset by pressing the Edit button.
 When all settings have been displayed, the SFAM goes back into RUN mode when the
Apushbutton/B pushbutton are pressed again and displays the current measurement value
forthecorresponding output.

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5.5 EDIT mode
Fig. 6 EDIT mode
5.5.1 Start EDIT mode
In the EDIT mode, you can configure settings for the switching output Out A, the switching output Out B
and the special menu [Spec].
Warning
Manipulation of signal statuses may cause serious personal injury, depending on the
functioning of the machine/system.
 Note that if the switching status of the outputs is modified in EDIT mode, the new
status will be effective immediately.
1. Press the Edit button.
The EDIT mode is active and [Out A] flashes or, if there is an active security lock, [Lock] flashes.
2. Press the A/B pushbuttons until the chosen security code is set.
3. Press the Edit button.
The EDIT mode is active and [Out A] flashes.
4. Press the A/B pushbutton to switch between the setting modes for Out A, Out B and the special
menu.