Festo SFAW Series User manual

en Operating
instructions
8049884
1602a
[8049886]
Flow sensor
SFAW

SFAW
2Festo – SFAW – 1602a
Translation of the original instructions
SFAW
Installation and commissioning must be carried out only by properly qualified personnel in accordance
with these operating instructions.
Identification of hazards and instructions on how to prevent them:
Warning
Hazards that can cause death or serious injuries.
Note
Dangers that can result in material damage or failure of function.
Other symbols:
Recommendations or references to additional sources of information.

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Festo – SFAW – 1602a English 3
English – Flow sensor SFAW
Table of contents
1 Product description 5.......................................................
1.1 Overview 5................................................................
1.2 Key features 6.............................................................
2 Function and application 7...................................................
2.1 Operating statuses 8........................................................
2.2 Switching outputs 9.........................................................
2.2.1 Switching functions 9...............................................
2.2.2 Colour change 9...................................................
2.2.3 Volume pulse 10....................................................
2.3 Analogue output 10..........................................................
2.4 Filter 11...................................................................
2.5 Security code 11............................................................
2.6 Minimum/maximum value 11..................................................
3 Requirements for product use 12...............................................
4 Installation 13..............................................................
4.1 Inlet and outlet situation 13...................................................
4.2 Mechanical installation 14.....................................................
4.3 Fluid connection 15..........................................................
4.4 Electrical installation 15.......................................................
5 Commissioning 17...........................................................
5.1 Symbols on the display 17.....................................................
5.2 Switch on sensor (RUN mode) 20...............................................
5.3 Displaying parameters (SHOW mode) 21.........................................
5.3.1 Start SHOW mode 22................................................
5.3.2 Display minimum/maximum value and reset 22...........................
5.3.3 Display average and reverse related filter time constant 22..................
5.4 Configure sensor (EDIT mode) 23...............................................
5.4.1 Enter the security code 25............................................
5.4.2 Setting the switching characteristics of the switching outputs 25.............
5.4.3 Setting display units and analogue output 26.............................

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5.4.4 Changing sensor settings 27...........................................
5.4.5 Replicating parameters 27............................................
5.5 Teach switching points (TEACH mode) 28.........................................
5.6 Measuring volume manually (RECORDER mode) 28.................................
6 Operation 29...............................................................
7 Maintenance and care 29.....................................................
8 Disassembly 29.............................................................
9 Fault clearance 30...........................................................
10 Accessories 31..............................................................
11 Technical data 32............................................................
12 Hole patterns and dimensional drawings 35......................................

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1 Product description
You can find detailed specifications for the product, the device description file (IODD)
with a description of the IO-Link parameters and the declaration of conformity at:
èwww.festo.com/sp www.festo.com.
The operating instructions describe the entire function range. The function range is lim
ited, depending on the product variant.
1.1 Overview
2
1
3
45
6
7
1Display, rotatable
2B key
3Edit button
4A key
5Electrical connection
6Fluid connection 1 (input), rotatable
7Fluid connection 2 (output), rotatable
Fig. 1 Control sections and connections

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1.2 Key features
Feature Value Description
Type SFAW Flow sensor for liquid media
Flow measuring range 32 Max. 32 l/min.
100 Max. 100 l/min.
Further measured variable Without temperature measurement
T Temperature
Connection type, input CClamped terminal connection
SFemale hose connector
TFemale thread
XUser connection (è4.3 Fluid connection)
Connection standard, input Without specification
S5 Clamped terminal connection in accordance with
DIN 32676:2009-05
Connection size, input G12 … G1 Thread G ½, G ¾, G 1
R12 … R1 Thread R ½, R ¾, R 1
N12 … N1 Thread NPT ½, NPT ¾, NPT 1
13, 19 Female hose connector 13 mm, 19 mm
15, 20 Clamped terminal connection DN 15, DN 20
Connection type, output CClamped terminal connection
SFemale hose connector
TFemale thread
EAs for input
XUser-provided connection (è4.3 Fluid connection)
Connection standard,
output
No specification
S5 Clamped terminal connection in accordance with
DIN 32676:2009-05
Connection size, output G12 … G1 Thread G ½, G ¾, G 1
R12…, R1 Thread R ½, R ¾, R 1
N12 … N1 Thread NPT ½, NPT ¾, NPT 1
13, 19 Female hose connector 13 mm, 19 mm
15, 20 Clamped terminal connection DN 15, DN 20
Type of mounting without mounting accessories
WWall mounting
Electrical output 1 PNLK PNP or NPN or IO-Link
Electrical output 2 PN PNP or NPN
PNVBA PNP or NPN or 0…10 V or 1…5 V or 4…20 mA
Electrical output 3 VBA 0…10 V or 1…5 V or 4…20 mA
Electrical connection M12 Plug connector M12, A-coded
Electrical accessories +2.5 S Straight socket, 2.5 m cable
+5 S Straight socket, 5 m cable
Protective devices GSafety guard
Tab. 1 Overview of variants

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2 Function and application
The SFAW is intended for use in monitoring the flow, volume and temperature of liquid media in piping
or terminal devices in industry. The flow velocity is recorded in accordance with the vortex principle. The
flow rate and the accumulated volume are calculated from the flow velocity. An optional, integrated
temperature sensor records the medium temperature.
Interfacing to the higher-level systems is provided by 2 switching outputs, an analogue output and/or
an IO-Link interface, depending on the type. The outputs can be configured as appropriate to the ap
plication.
The switching outputs can be configured to monitor a threshold value or a range. For each output, PNP
or NPN and normally open (NO) or normally closed (NC) can optionally be set. Via the IO-Link interface,
process values can be read out and parameters changed and transmitted to additional devices.
Flow rate
Q
Temperature
T
InA
analogue Q
InB
analogue T
InC
Volume pulse VP
InD
Volume recorder V
OutA
binary Q/BDC1
OutC
binary VP/BDC3
OutB
binary T/BDC2
OutD
binary Q/BDC4
Pin 4
Q or VP
Pin 2
T or Q
InA
analogue Q/PDV1_2byte
InB
analogue T/PDV2_2byte
InD
analogue V/onReq_4byte
Fig. 2 SFAW-…PNLK-PNVBA-…: Signal structure

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Flow rate
Q
Temperature
T
InA
analogue Q
InB
analogue T
InC
Volume pulse VP
InD
Volume recorder V
OutA
binary Q/BDC1
OutC
binary VP/BDC3
OutB
binary T/BDC2
OutD
binary Q/BDC4
Pin 4
Q or VP
InA
analogue Q/PDV1_2byte
InB
analogue T/PDV2_2byte
InD
analogue V/onReq_4byte
Pin 2
T or Q
Pin 5
Q or T
Fig. 3 SFAW-…PNLK-PN-VBA-…: Signal structure
2.1 Operating statuses
Operating status Function
RUN mode – Basic status after the operating voltage is switched on
– 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 resetting of the minimum and maximum values
Edit mode – Setting or modification of parameters
TEACH mode – Acceptance of the current measured value to determine switching points
RECORDER mode – Manual measurement of the accumulated volume
Tab. 2 Operating statuses of the SFAW

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2.2 Switching outputs
2.2.1 Switching functions
Threshold value comparator in the flow measurement for OutA or OutD and in the temperature meas
urement for OutB
Function NO (normally open) NC (normally closed)
Switching function:
– 1 switching point (SP)
TEACH mode1):
– 2 teach-in points (TP1,
TP2)
– SP = ½ (TP1+TP2)
Q
1
0
HY
OUT
SP
TP1 TP2
Q
1
0
SP
HY
OUT
TP1 TP2
1) Only with flow measurement
Tab. 3 Threshold value comparator: setting of switching point SP and hysteresis HY
Window comparator in the flow measurement for OutA or OutD and in the temperature measurement
for OutB
Function NO (normally open) NC (normally closed)
Switching function:
– 2 switching points
(SP.Lo, SP.Hi)
TEACH mode1)2):
– 2 teach-in points (TP1,
TP2)
– TP1 = SP.Lo, TP2 = SP.Hi
HY HY
Q
1
0
OUT
TP1=SP.Lo TP2=SP.Hi
Q
1
0
OUT
HY HY
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. 4 Window comparator: setting of switching points SP.Lo and SP.Hi and hysteresis HY
2.2.2 Colour change
A red colour change in the display can be set for OutA, OutB and OutD. As a result, the system status
can be identified over a large distance.
The measured variable that first caused the colour change always appears in the display. The unit and
the corresponding output OutA/OutC/OutD flash in the sub display. The display remains red until all
switching outputs are in the blue status again.

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2.2.3 Volume pulse
A threshold value for the volume can be set in the accumulated volume measurement. If the configured
threshold value is reached, a switching impulse is emitted at the output OutC for an adjustable period
of time. With each switching impulse, the volume measurement is started again (èFig. 4).
Volume pulse with accumulated volume measurement
Setting NO (normally open) Setting NC (normally closed)
t
t
0
OUT C
1
0Pulse
V
SP
t
t
0
OUT C
1
0
SP
Pulse
V
Fig. 4 Volume pulse
2.3 Analogue output
Analogue signal
The signal of the analogue output can be assigned the physical measured variables of flow rate or tem
perature. The physical measured value of flow rate is configured as standard.
Output signal
The analogue output can be operated either as a voltage output 0 … 10 V or 1 … 5 V or as a current
output 4 … 20 mA. The voltage output 0 … 10 V is set at the factory.
Scaling of the analogue signal
The analogue output signal 0 … 10 V, 1 … 5 V or 4 … 20 mA is assigned to the complete sensing range at
the factory. If only part of the sensing range is to be used, the analogue value output can be scaled to
this partial range.