SUTO S421 Manual
English
Instruction and Operation Manual
S421
Thermal Mass Fow Meter
(Inline)
Dear Customer,
Thank you for choosing our product.
Please read this manual in full and carefully observe the operating
instructions 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 e empt from liability.
The device is designed e clusively for the described application.
SUTO offers no guarantee for suitability for any other purpose. SUTO is
also not liable for consequential damage resulting from the delivery,
capability, or use of this device.
2 S421
Table of Contents
1 Safety Instructions......................................................................4
2 Registered Trademarks................................................................6
3 RF E posure Information and Statement........................................7
4 Application.................................................................................8
5 Features....................................................................................8
6 Technical Data............................................................................9
6.1 General................................................................................9
6.2 Electrical Data.......................................................................9
6.3 Output-Signals....................................................................10
6.4 Accuracy ...........................................................................10
6.5 Volumetric Vlow Ranges.......................................................10
7 Dimensional Drawing.................................................................12
8 Determe the Installation Point.....................................................15
8.1 Add the Required Inlet Section..............................................15
9 Installation .............................................................................19
9.1 Install the Flow Meter...........................................................19
9.2 Remove the Flow Meter........................................................20
9.3 Electrical Connection ..........................................................21
9.3.1 M12 Connector Types.....................................................21
9.3.2 Ethernet Connection.......................................................24
10 Signal Outputs........................................................................26
10.1 Analog Output...................................................................26
10.2 Pulse Output.....................................................................26
10.2.1 Pulse Connection Diagrams (A1410)...............................28
10.2.2 Pulse Connection Diagrams (A1413)...............................29
10.3 Modbus Interface...............................................................31
10.3.1 Modbus Information.....................................................31
10.3.2 Connect Modbus/RTU Devices to a Master.......................32
10.4 M-Bus Output....................................................................36
10.5 Connection between S421 Outputs and Customer Equipment. .37
11 Configuration..........................................................................41
11.1 Service App S4C-FS...........................................................41
11.2 Device Display (Optional)....................................................42
11.2.1 Start-up......................................................................43
11.2.2 Operations..................................................................44
11.2.3 Menu Map...................................................................45
12 Calibration..............................................................................47
13 Maintenance...........................................................................47
14 Disposal or Waste....................................................................47
S421 3
1 Safety Instructions
1 Safety Instructions
Please check if this instruction manual matches the
roduct ty e.
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 meter at any time. In case of any obscurities or questions,
regarding this manual or the product, please contact the manufacturer.
WARNING!
Com ressed air!
Any contact with quickly esca ing air or bursting
arts of the com ressed air system can lead to
serious injuries or even death!
•Do not e ceed the ma imum permitted pressure range (see
devices label).
•Only use pressure-tight installation material.
•Avoid that persons get hit by escaping air or bursting parts of the
instrument.
•The system must be pressureless during maintenance work.
WARNING!
Voltage used for su ly!
Any contact with energized arts of the roduct
might lead to an 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.
•Any electrical work on the system is only allowed by authorized
qualified personal.
4 S421
1 Safety Instructions
ATTENTION!
Permitted o erating arameters!
Observe the ermitted o erating arameters. Any
o eration exceeding these arameters can lead to
malfunctions and might lead to damage on the
instrument or the system.
•Do not e ceed the permitted operating parameters.
•Make sure the product is operated in its permitted limitations.
•Do not e ceed or undercut the permitted storage and operating
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 e plosive areas.
•Please observe the national regulations before/during installation
and operation.
Remarks
•It is not allowed to disassemble the product.
•Always use a spanner to mount the product properly.
ATTENTION!
Measurement values can be affected by malfunction!
The roduct must be installed ro erly and
frequently maintained. Otherwise it might lead to
wrong measurement values and wrong results.
•Always observe the direction of the flow when installing the
device. The direction is indicated on the housing.
•Do not e ceed the ma imum operating temperature at the sensor
tip.
•Avoid condensation on the sensor element as this will affect
accuracy enormously.
S421 5
1 Safety Instructions
Storage and trans ortation
•Make sure that the transportation temperature of the device
without the display is between -30 ... +70°C and with the display
between -10 ... +60°C.
•For storage and transportation, it is recommended to use the
packaging which comes with the device.
•Please make sure that the storage temperature of the device is
between -10 ... +50°C.
•Avoid direct UV and solar radiation during storage.
•For the storage, the humidity must be <90% with no
condensation.
2 Registered Trademarks
Trademark Trademark owner
SUTO®SUTO iTEC
MODBUS®Modbus Organization, Hopkinton, USA
HART®HART Communication Foundation, Austin, USA
Android™,
Google Play
Google LLC
6 S421
3 RF E posure Information and Statement
3 RF Ex osure Information and Statement
This equipment complies with FCC RF radiation e posure limits set forth
for an uncontrolled environment. This equipment should be installed
and operated with a minimum distance of 20 cm between the radiator
and your body.
This device complies with part 15 of the FCC rules. Operation is subject
to the following two conditions: (1) this device might not cause harmful
interference, and (2) this device must accept any interference received,
including interference that might cause undesired operation.
Remark: The manufacturer is not responsible for any radio or TV
interference caused by unauthorized modifications to this equipment.
Such modifications could void the user’s authority to operate the
equipment.
Remark: This equipment has been tested and found to comply with the
limits for a Class B digital device, pursuant to part 15 of the FCC Rules.
These limits are designed to provide reasonable protection against
harmful interference in a residential installation. This equipment
generates uses and can radiate radio frequency energy and, if not
installed and used in accordance with the instructions, might cause
harmful interference to radio communications. However, there is no
guarantee that interference will not occur in a particular installation. If
this equipment does cause harmful interference to radio or television
reception, which can be determined by turning the equipment off and
on, the user is encouraged to try to correct the interference by one or
more of the following measures:
•Reorient or relocate the receiving antenna.
•Increase the separation between the equipment and receiver.
•Connect the equipment into an outlet on a circuit different from
that to which the receiver is connected.
•Consult the dealer or an e perienced radio/TV technician for help。
•This device and its antenna(s) must not be co-located or operating
in conjunction with any other antenna or transmitter.
S421 7
4 Application
4 A lication
The S421 is the inline-type flow meter that is designed to measure the
consumption of compressed air and gases within the permissible
operating parameters. (See chapter 6 Technical Data on the ne t
page.)
The S421 can measure the following values:
•Volume flow of the compressed air or gas (default unit: m3/h)
•Total consumption of the compressed air or gas (default unit: m3)
Other units can be configured by using the S4C-FS Android service app
or the optional device display.
The S421 flow meter is mainly used in compressed air systems in
industrial environment, and is not developed to be used in e plosive
areas. For the use in e plosive areas, please contact the manufacturer.
5 Features
•Inline type flow meter for high accuracy in small tube diameters
•Thermal mass flow measurement, virtually independent of
pressure and temperature changes
•IP65 casing for robust protection in the industrial environment.
•Very fast response time
•Particularly suitable for measuring process gases such as Ar, O2,
CO2 etc
•Optional display, showing velocity, volume flow, and consumption
•Various signal output options, such as analog and pulse, Modbus
RTU, Modbus TCP, or M-Bus
•Optional Power over Ethernet (PoE) for the Modbus TCP output
•Two gas calibrations (optional)
8 S421
6 Technical Data
6 Technical Data
6.1 General
FCC ID: 2ASK2-SUTO-001
Parameters Standard unit (flow): m3/h
Other units (flow): m3/min, l/min, l/s, cfm,
kg/h, kg/min, kg/s
Units (Consumption): m3, ft3 , kg
Reference conditions ISO1217 20°C 1000 hPa (Standard-Unit)
DIN1343 0°C 1013.25 hPa (Norm-Unit)
Principle of measurement Thermal mass flow
Sensor Glass-coated resistive sensor
Measuring medium Air, gas (non-corrosive gas)
Measuring range See table in section 6.5
Operating temperature -30 ... +140°C fluid temperature
-30 ... +70°C casing
-10 ... +50°C display (optional)
Humidity of the measured
medium
< 90%, no condensation
Operating pressure 0 ... 1.6 Mpa(g), optional: 4.0 MPa(g)
Housing material PC + ABS
Material of the shaft device
head (welded parts)
Stainless steel 1.4404 (SUS 316L)
Protection class IP65
Dimensions See dimensional drawing on page 12
Display (optional) 2.4” color graphics display with keypad
Tube diameter DN15 ... DN80
Weight 0.6 kg (Instrument only, not including the
measuring section)
6.2 Electrical Data
Power supply 15 ... 30 VDC, 200 mA
44 ... 57 VDC, 120 mA (PoE)
S421 9
6 Technical Data
6.3 Out ut-Signals
Analogue output Signal: 4 ... 20 mA, isolated
Scaling: 0 to ma flow
Ma load: 250R
Pulse output 1 pulse per consumption unit, isolated switch,
ma . 30 VDC, 200 mA
(pulse length: 10 ... 120 ms, depends on flow
rate)
Modbus output See section 10.3 on page 31.
M-bus output See section 10.4 on page 36.
6.4 Accuracy
Accuracy* ± (1.5% of reading + 0.3% FS)
(Optional high accuracy: 1% of reading + 0.3% FS)
Temperature drift: < 0.05%/K
Stated accuracy at Ambient/process temperature 23°C ± 3°C
Ambient/process humidity <90%
Process pressure at 0.6 MPa(g)
Repeatability ±0.25% of reading
*Specified accuracy is valid only within the minimum and ma imum flow rates
that are indicated in section 6.5 on this page.
6.5 Volumetric Vlow Ranges
Inch DN S421 (m³/h)
½" DN15 0.5 ... 90
¾" DN20 0.9 ... 170
1" DN25 1.5 ... 290
1¼" DN32 2 ... 500
1½" DN40 3 ... 700
2" DN50 4 ... 1,000
2½" DN65 6 ... 1,500
3" DN80 8 ... 2,500
10 S421
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