SUTO S409 Manual
English
Instruction and operation manual
S409
Thermal Mass Flow
Direction Switch
Dear Customer,
Thank you for choosing our product.
The operating instructions must be read in full and carefully observed
before starting up the device. The manufacturer cannot be held liable
for any damage which occurs as a result of non-observance or non-
compliance with this manual.
Should the device be tampered with in any manner other than a
procedure which is described and specified in the manual, the warranty
is void and the manufacturer is exempt from liability.
The device is destined exclusively for the described application.
S TO offers no guarantee for the suitability for any other purpose.
S TO is also not liable for consequential damage resulting from the
delivery, capability or use of this device.
2 S409
Table of Contents
1 Safety instructions......................................................................4
2 Registered trademarks.................................................................6
3 Application.................................................................................7
4 Features....................................................................................7
5 Technical Data............................................................................8
5.1 General................................................................................8
5.2 Electrical Data.......................................................................8
5.3 Output signals......................................................................8
6 Dimensional drawing...................................................................9
7 Determination of the installation point.........................................10
8 Installation ..............................................................................11
8.1 Installation Requirements.....................................................11
8.2 Installation Procedure .........................................................11
8.3 Electrical connection ..........................................................13
8.3.1 Connection of S330/S331 to S450 ..................................15
8.3.2 Connection of S330/S331 to S401...................................15
9 Signal outputs..........................................................................18
10 Optional accessories................................................................18
11 Maintenance...........................................................................18
12 Disposal or waste....................................................................18
S409 3
1 Safety instructions
1 Safety instructions
lease check if this instruction manual matches the
product type.
Please observe all notes and instructions indicated in this
manual. It contains essential information which must be
observed before and during installation, operation and
maintenance. Therefore this instruction manual must be read carefully
by the technician as well as by the responsible user / qualified
personnel.
This instruction manual must be available at the operation site of the
flow direction switch at any time. In case of any obscurities or
questions, regarding this manual or the product, please contact the
manufacturer.
WARNING!
Compressed air!
Any contact with quickly escaping air or bursting
parts of the compressed air system can lead to
serious injuries or even death!
•Do not exceed the maximum permitted pressure range (see
sensors label).
•Only use pressure tight installation material.
•Avoid that persons get hit escaping air or bursting parts of the
instrument.
•The system must be pressureless during maintenance work.
WARNING!
Voltage used for supply!
Any contact with energized parts of the product, may
lead to a electrical shock which can lead to serious
injuries or even death!
•Consider all regulations for electrical installations.
•The system must be disconnected from any power supply during
maintenance work.
•Any electrical work on the system is only allowed by authorized
qualified personal.
4 S409
1 Safety instructions
ATTENTION!
ermitted operating parameters!
Observe the permitted operating parameters, any
operation exceeding this parameters can lead to
malfunctions and may lead to damage on the
instrument or the system.
•Do not exceed the permitted operating parameters.
•Make sure the product is operated in its permitted limitations.
•Do not exceed or undercut the permitted storage and operation
temperature and pressure.
•The product should be maintained and calibrated frequently, at
least annually.
General safety instructions
•It is not allowed to use the product in explosive areas.
•Please observe the national regulations before/during installation
and operation.
Remarks
•It is not allowed to disassemble the product.
•Always use spanner to mount the product properly.
ATTENTION!
Measurement values can be affected by malfunction!
The product must be installed properly and
frequently maintained, otherwise it may lead to
wrong measurement values, which can lead to
wrong results.
•Always observe the direction of the flow when installing the
sensor. The direction is indicated on the housing.
•Do not exceed the maximum operation temperature at the sensors
tip.
•Avoid condensation on the sensor element as this will affect the
accuracy enormously.
S409 5
1 Safety instructions
Storage and transportation
•Make sure that the transportation temperature of the sensor is
between -30°C... +70°C.
•For transportation it is recommended to use the packaging which
comes with the sensor.
•Please make sure that the storage temperature of the sensor is
between -10°C... +50°C.
•Avoid direct V and solar radiation during storage.
•For the storage the humidity must be <90%, no condensation.
2 Registered trademarks
S TO®Registered trademark of S TO iTEC
MODB S®Registered trademark of the Modbus Organization,
Hopkinton, SA
HART®Registered trademark of the HART Communication
Foundation, Austin, SA
Android™,
Google Play
Trademarks of Google LLC
6 S409
3 Application
3 Application
The S409 is a thermal mass flow direction switch which is designed to
detect the direction of the flow inside of a pipe. The flow and direction
information is output through 2 normally open relay switches. This
signal can be transferred to a flow sensor to activate and deactivate the
flow measurement depending on the flow direction
The S409 is not developed to be used in explosive areas. For the use in
explosive areas please contact the manufacturer.
The S409 is mainly used in compressed air systems in industrial
environment.
4 Features
•Detects smallest changes < 0.1 m/s referred to 20°C and 1000
hpa.
•No mechanical wear parts.
•Insertion type flow direction switch for easy installations under
pressure through a ball valve.
•All parts that are in contact with the flow medium are made of
stainless steel.
•IP65 casing provides robust protection in the industrial
environment.
S409 7
5 Technical Data
5 Technical Data
5.1 General
Reference conditions ISO1217 20°C 1000 mbar (Standard- nit)
DIN1343 0°C 1013,25 mbar (Norm- nit)
Sensor 2 x Pt 1000
Detection range 0.02 ... 25 m/s @ 7 barg, +20°C
Measuring medium Air, gas (non corrosive gas)
Medium temperature -20 ... +80°C
Humidity of the meas.
medium
< 100% (no condensation)
Operating temperature -20 ... +70°C
Operating pressure 0 ... 1.6 MPa
Housing material PC + ABS
Material of the probe
tube, probe tip and the
screwing
Stainless steel 1.4404
Protection class IP65
Dimensions See dimensional drawing on the next page
Tube diameter ½ to 12 (bigger diameters on request)
Screwing thread G1/2” (ISO 228-1)
Weight 509 g
5.2 Electrical Data
Power supply 24 VDC, 60 mA
5.3 Output signals
Alarm output 2 x relay, 60 V, 1 A
8 S409
7 Determination of the installation point
7 Determination of the installation point
In order to maintain the accuracy stated in the technical data, the S409
must be insert in the pipe without touching the inner wall of the pipe.
Please consider that enough space exists at your site for a adequate
installation as described in this manual.
ATTENTION!
Wrong measurement is possible if the instrument is
not installed correctly.
•The S409 is for indoor use only! At an outdoor installation, the
S409 must be protected from solar radiation and rain.
•It is strongly recommend not to install S409 permanently in wet
environment which exists usually right after a compressor outlet.
10 S409
8 Installation
8 Installation
Before installing the S409, please make sure that all components listed
below are included in your package.
Qty Description Item No.
1 S409 Thermal Mass Flow Direction Switch S695 0409
1 Sealing ring N/A
1 Alignment key N/A
2 M12 plug C219 0059
1 Instruction manual N/A
8.1 Installation Requirements
To install the S409, a ball valve or a nozzle is needed.
•The inner thread must be G 1/2”.
•The diameter of the hole must be 13mm, otherwise the shaft
can not be inserted.
•Ensure that there is a minimum clearance between S409 and the
flow meter of at least 30 X D and the S409 is at least 20 X D away
from any bend, or obstruction in the pipe.
8.2 Installation rocedure
Signs of switches and flow directions
DIR1, DIR2: indicates two switches separately.
B : indicates the forward flow direction.
A : Indicates the reverse flow direction.
When the flow is forward (that is in direction B), the switch DIR1 turns
on and DIR2 off. When the flow is reverse (that is in direction A), the
switch DIR1 turns off and DIR2 on.
In a typical installation, the following two requirements must be met:
•The forward flow direction of the S409, the forward flow direction
of the flowmeter, and the the flow direction of gas in the pipe must
be consistent.
•Connect the connector B of the S409 to the flowmeter.
S409 11
8 Installation
Installing the S409
1. Ball valve must be closed.
2. The probe tip must be completely covered by
the connection thread. (see left photo).
3. nderlay the “O-ring” at the thread of the
ball valve before screwing the S409.
4. Screw the connection thread tightly to the
ball valve and align S409 to flow direction.
5. Switch on the ball valve and tighten clamp
sleeve manually by hand.
6. Insert the sensor tip at least 20 mm from
the inner wall of the pipe or into the center.
7. Tighten the clamp sleeve at the connection
thread so that the S409 cannot be moved by
the pressure in the pipe. However it should
be possible to move the S409 shaft
manually.
8. With the aid of the alignment key make sure
having a proper aligment (The angle
deviation should not be larger than ± 2° to
the perfect position).
9. Tighten clamp sleeve with clamping torque
20 … 30 Nm.
10. During the final check control the
installation depth again because sometimes
the shaft is moved from its original position
due the compressed air.
12 S409
8 Installation
Maximum angle deviation of a proper installation:
Removing the S409
1. Hold the S409.
2. Release the clamp sleeve at the connection thread.
3. Pull out the shaft slowly until the value “10” can be read at the
scale.
4. Close the ball valve.
5. Release the connection thread and unscrew the S409.
8.3 Electrical connection
The S409 is equipped with two M12 connectors “A” and “B”. The cables
are connected to the S409 through the M12 connector.
Connector A
Connector B
S409 13
8 Installation
Connection pins of the M12 connector
in assignment
Connection pins (view from the clamping side)
Pin 1 Pin 2 Pin 3 Pin 4 Pin 5
Connector A NA -VB+VBDIR1 DIR1
Connector B NA -VB+VBDIR2 DIR2
Legend to pin assignment
-VBNegative supply voltage
+VBPositive supply voltage
DIR1 Flow direction input 1
DIR2 Flow direction input 2
NA Not applicable
ATTENTION!
Do not screw the M12 connector using force.
Otherwise, it may damage the connecting pins.
Relay output at the switch
Figure 1: Forward Direction Figure 2: Reverse Direction
14 S409
8 Installation
8.3.1 Connection of S330/S331 to S450
Note: Illustration of how to connect S409 to a bi-directional version of
S450 and the S TO display S330/S331. Of course the S409 can also be
operated without the S330/S331 display unit.
8.3.2 Connection of S330/S331 to S401
Please note the following:
•It is strongly recommended to define which flow direction is
forward and which is reverse.
•Keep the direction sign on the S409 pointed to the forward flow
direction.
•Connect S409 with S401 according to the following diagrams.
S409 15
9 Signal outputs
9 Signal outputs
The S409 has two relay outputs (60 V, 1 A).
10 Optional accessories
The following accessories are available:
•Sensor cable, 5 m, with the M12 connector on one end and open
wires on the other.
•Sensor cable, 10 m, with the M12 connector on one end and open
wires on the other.
11 Maintenance
To clean the instrument, it is recommended to use distilled water or
isopropyl alcohol only.
ATTENTION!
Do not touch the surface of the instrument plate.
Avoid mechanical impact on the instrument (e.g
with a sponge or a brush).
12 Disposal or waste
Electronic devices are recyclable material and do not
belong in the household waste.
The sensor, the accessories and its packing must be
disposed according to your local statutory requirements.
The dispose can also be carried by the manufacturer of the
product, for this please contact the manufacturer.
18 S409
S TO iTEC GmbH
Grißheimer Weg 21
D-79423 Heitersheim
Germany
S TO iTEC (ASIA) Co., Ltd.
Room 10, 6/F, Block B, Cambridge Plaza
188 San Wan Road, Sheung Shui, N.T.
Hong Kong
Tel: +49 (0) 7634 50488 00
Email: [email protected]
Website: www.suto-itec.com
Tel: +852 2328 9782
Email: [email protected]
Website: www.suto-itec.com
S TO iTEC Inc.
5460 33rd St SE
Grand Rapids, MI 49512
SA
Tel: +1 (616) 800-7886
Email: [email protected]
Website: www.suto-itec.com
All rights reserved © Modifications and errors reserved
S409_im_en_2024-1
20 S409
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