SMC Corporation PF3W3 Series User manual

No.PF※※-OMN0012-G
PRODUCT NAME
Digital Flow Switch
(Remote type monitor unit)
MODEL / Series / Product Number
PF3W3##

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No.PF※※-OMN0012-G
Table of Contents
Safety Instructions 2
Model Indication and How to Order 9
Summary of Product parts 12
Definition and terminology 13
Mounting and Installation 15
Installation 15
Wiring 16
Flow Setting 21
Function Setting 24
Default settings 25
F0 Selection of sensor 26
F1 Setting of OUT1 27
F2 Setting of OUT2 35
F3 Response time setting 41
F10 Selection of sub screen 42
F20 Setting of external input 46
F22 Setting of analogue output 47
F30 Storing of accumulated flow 49
F80 Setting of power saving mode 50
F81 Setting of security code 51
F82 Input of line names 52
F90 Setting of all functions 53
F96 Input value check 54
F97 Selection of copy function 55
F98 Output check 58
F99 Reset to the default settings 59
Other Settings 60
Maintenance 63
Troubleshooting 64
Specification 67
Specifications 67
Characteristics graph 70
Dimensions 71

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No.PF※※-OMN0012-G
Safety Instructions
These safety instructions are intended to prevent hazardous situations and/or equipment damage.
These instructions indicate the level of potential hazard with the labels of "Caution", "Warning" or "Danger".
They are all important notes for safety and must be followed in addition to International Standards (ISO/IEC)*1),
and other safety regulations.
*1) ISO 4414: Pneumatic fluid power -- General rules relating to systems.
ISO 4413: Hydraulic fluid power -- General rules relating to systems.
IEC 60204-1: Safety of machinery -- Electrical equipment of machines. (Part 1: General requirements)
ISO 10218: Manipulating industrial robots -Safety.
etc.
Caution
Caution indicates a hazard with a low level of risk which, if not avoided, could
result in minor or moderate injury.
Warning
Warning indicates a hazard with a medium level of risk which, if not avoided,
could result in death or serious injury.
Danger
Danger indicates a hazard with a high level of risk which, if not avoided, will
result in death or serious injury.
Warning
1. The compatibility of the product is the responsibility of the person who designs the
equipment or decides its specifications.
Since the product specified here is used under various operating conditions, its compatibility with specific
equipment must be decided by the person who designs the equipment or decides its specifications
based on necessary analysis and test results.
The expected performance and safety assurance of the equipment will be the responsibility of the person
who has determined its compatibility with the product.
This person should also continuously review all specifications of the product referring to its latest catalog
information, with a view to giving due consideration to any possibility of equipment failure when
configuring the equipment.
2. Only personnel with appropriate training should operate machinery and equipment.
The product specified here may become unsafe if handled incorrectly.
The assembly, operation and maintenance of machines or equipment including our products must be
performed by an operator who is appropriately trained and experienced.
3. Do not service or attempt to remove product and machinery/equipment until safety is
confirmed.
1. The inspection and maintenance of machinery/equipment should only be performed after measures to
prevent falling or runaway of the driven objects have been confirmed.
2. When the product is to be removed, confirm that the safety measures as mentioned above are
implemented and the power from any appropriate source is cut, and read and understand the specific
product precautions of all relevant products carefully.
3. Before machinery/equipment is restarted, take measures to prevent unexpected operation and malfunction.
4. Contact SMC beforehand and take special consideration of safety measures if the
product is to be used in any of the following conditions.
1. Conditions and environments outside of the given specifications, or use outdoors or in a place
exposed to direct sunlight.
2. Installation on equipment in conjunction with atomic energy, railways, air navigation, space, shipping,
vehicles, military, medical treatment, combustion and recreation, or equipment in contact with food and
beverages, emergency stop circuits, clutch and brake circuits in press applications, safety equipment or
other applications unsuitable for the standard specifications described in the product catalog.
3. An application which could have negative effects on people, property, or animals requiring special
safety analysis.
4. Use in an interlock circuit, which requires the provision of double interlock for possible failure by using
a mechanical protective function, and periodical checks to confirm proper operation.

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No.PF※※-OMN0012-G
Safety Instructions
Caution
1.The product is provided for use in manufacturing industries.
The product herein described is basically provided for peaceful use in manufacturing industries.
If considering using the product in other industries, consult SMC beforehand and exchange specifications
or a contract if necessary.
If anything is unclear, contact your nearest sales branch.
Limited warranty and Disclaimer/Compliance Requirements
The product used is subject to the following "Limited warranty and Disclaimer" and "Compliance
Requirements".
Read and accept them before using the product.
Limited warranty and Disclaimer
1. The warranty period of the product is 1 year in service or 1.5 years after the product is delivered,
whichever is first.2)
Also, the product may have specified durability, running distance or replacement parts. Please
consult your nearest sales branch.
2. For any failure or damage reported within the warranty period which is clearly our responsibility,
a replacement product or necessary parts will be provided.
This limited warranty applies only to our product independently, and not to any other damage
incurred due to the failure of the product.
3. Prior to using SMC products, please read and understand the warranty terms and disclaimers
noted in the specified catalog for the particular products.
2) Vacuum pads are excluded from this 1 year warranty.
A vacuum pad is a consumable part, so it is warranted for a year after it is delivered.
Also, even within the warranty period, the wear of a product due to the use of the vacuum
pad or failure due to the deterioration of rubber material are not covered by the limited
warranty.
Compliance Requirements
1. The use of SMC products with production equipment for the manufacture of weapons of mass
destruction (WMD) or any other weapon is strictly prohibited.
2. The exports of SMC products or technology from one country to another are governed by the
relevant security laws and regulation of the countries involved in the transaction. Prior to the
shipment of a SMC product to another country, assure that all local rules governing that export
are known and followed.
Caution
SMC products are not intended for use as instruments for legal metrology.
Products that SMC manufactures or sells are not measurement instruments that are qualified by pattern
approval tests relating to the measurement laws of each country.
Therefore, SMC products cannot be used for business or certification ordained by the measurement laws of
each country.

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No.PF※※-OMN0012-G
Operator
This operation manual is intended for those who have knowledge of machinery using pneumatic
equipment, and have sufficient knowledge of assembly, operation and maintenance of such
equipment. Only those persons are allowed to perform assembly, operation and maintenance.
Read and understand this operation manual carefully before assembling, operating or providing
maintenance to the product.
■Precautions
Warning
■Do not disassemble, modify (including changing the printed circuit board) or repair.
An injury or failure can result.
■Do not operate the product outside of the specifications.
Do not use for flammable or harmful fluids.
Fire, malfunction, or damage to the product can result.
Verify the specifications before use.
■Do not operate in an atmosphere containing flammable or explosive gases.
Fire or an explosion can result.
This product is not designed to be explosion proof.
■Do not use with flammable or highly permeable fluids.
Fire, explosion, damage or corrosion can result.
■Do not use the product in a place where static electricity is a problem.
Otherwise it can cause failure or malfunction of the system.
■If using the product in an interlocking circuit:
Provide a double interlocking system, for example a mechanical system.
Check the product regularly for proper operation.
Otherwise malfunction can result, causing an accident.
■The following instructions must be followed during maintenance:
Turn off the power supply.
Ensure the flow is shut off before performing maintenance.
Otherwise an injury can result.

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No.PF※※-OMN0012-G
Caution
■Do not touch the terminals and connectors while the power is on.
Otherwise electric shock, malfunction or damage to the product can result.
■Do not touch the piping or its connected parts when the fluid is at high temperature.
It may lead to burnt.
Ensure the piping cools sufficiently before touching.
■After maintenance is complete, perform appropriate functional inspections and leak tests.
Stop operation if the equipment does not function properly or there is a leakage of fluid.
When leakage occurs from parts other than the piping, the product might be faulty.
Disconnect the power supply and stop fluid supply.
Do not apply fluid under leaking conditions.
Safety cannot be assured in the case of unexpected malfunction.
■NOTE
○Follow the instructions given below when designing, selecting and handling the product.
●The instructions on design and selection (installation, wiring, environment, adjustment, operation,
maintenance, etc.) described below must also be followed.
Product specifications
The direct current power supply to be used should be UL approved as follows.
Circuit (of class 2) which is of maximum 30 Vrms (42.4 V peak) or less, with UL 1310 class 2 power supply unit or
UL 1585 class 2 transformer.
The product is a UL approved product only if it has a mark on the body.
Use the specified voltage.
Otherwise failure or malfunction can result.
Insufficient supply voltage may not drive a load due to a voltage drop inside the product.
Verify the operating voltage of the load before use.
Do not exceed the specified maximum allowable load.
Otherwise it can cause damage or shorten the life of the product.
Input data to the product is not deleted, even if the power supply is cut off. (Number of times of rewriting:
1000000 times)
Reserve a space for maintenance.
Allow sufficient space for maintenance when designing the system.

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No.PF※※-OMN0012-G
●Product handling
Installation
Tighten to the specified tightening torque.
If the tightening torque is exceeded the mounting screws, brackets and the product can be broken. Insufficient
torque can cause displacement of the product from its proper position and the looseness of the mounting screws.
(Refer to "Mounting and Installation" on page 15.)
Be sure to ground terminal FG when using a commercially available switch-mode power supply.
Do not use in a place subject to heavy vibration and/or shock.
Otherwise damage to the internal parts can result, causing malfunction.
Do not pull the lead wire forcefully, not lift the product by pulling the lead wire. (Tensile force 30 N or
less)
Hold the body when handling to avoid the damage of the product.
The product will be damaged, leading to failure and malfunction.
Never mount the product in a location that will be used as a scaffold.
The product may be damaged if excessive force is applied by stepping or climbing onto it.

Wiring
Do not pull the lead wires. In particular, never lift a product equipped with fitting and piping by holding the
lead wires.
Otherwise damage to the internal parts can result, causing malfunction or disconnection from the connector.
Avoid repeatedly bending, stretching or applying a heavy object or force to the lead wire.
Repetitive bending or tensile stress can cause the sheath of the wire to peel off, or break the wire.
If the lead wire can move, fix it near the body of the product.
The recommended bend radius of the lead wire is 6 times the outside diameter of the sheath, or 33 times the
outside diameter of the insulation material, whichever is larger.
Replace a damaged lead wire with a new one.
Wire correctly.
Incorrect wiring can break the product.
Do not perform wiring while the power is on.
Otherwise damage to the internal parts can result, causing malfunction.
Do not route wires and cables together with power or high voltage cables.
Otherwise the product can malfunction due to interference of noise and surge voltage from power and high voltage
cables to the signal line. Route the wires (piping) of the product separately from power or high voltage cables.
Confirm proper insulation of wiring.
Poor insulation (interference from another circuit, poor insulation between terminals, etc.) can lead to excess
voltage or current being applied to the product, causing damage.
Keep wiring as short as possible to prevent interference from electromagnetic noise and surge voltage.
Do not use a cable longer than 30 m.
Wire the DC( - ) line (blue) as close as possible to the power supply.
When the analogue output is used, install a noise filter (line noise filter, ferrite element, etc.) between the
switch-mode power supply and this product.

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No.PF※※-OMN0012-G
Environment
Do not use the product in an environment that is constantly exposed to the splash of water.
Otherwise failure or malfunction can result. Take measures such as using a cover.
Do not use the product in an environment where corrosive gases or fluids could be splashed.
Otherwise damage to the product and malfunction can result.
Do not use in a place where the product could be splashed by oil or chemicals.
If the product is used in an environment containing oils or chemicals such as coolant or cleaning solvent, even for a
short time, it may be adversely affected (damage, malfunction, or hardening of the lead wires).
Do not use in an area where surges are generated.
When a machine or equipment generating large surge near the product (magnetic type lifter, high frequency inductive
furnace, motor, etc.), this can result in malfunction (display of incorrect value), deterioration and damage of internal
elements. Take measures against the surge sources, and prevent the lines from coming into close contact.
Do not use a load which generates surge voltage.
When a surge-generating load such as a relay or solenoid is driven directly, use a Flow switch with a built-in surge
absorbing element.
The product is CE marked, but not immune to lightning strikes. Take measures against lightning strikes
in the system.
Mount the product in a location that is not affected by vibration or impact.
Otherwise failure or malfunction can result.
Do not use the product in the presence of a magnetic field.
Such use can result in malfunction of the product.
Do not let foreign matter, such as wire debris, get inside the product.
To prevent malfunction or failure take measures to prevent the debris entering the product.
Do not use this product in places where there are cyclic temperature changes.
Heat cycles other than ordinary changes in temperature can adversely affect the inside of the product.
Do not expose the product to direct sunlight.
If using in a location directly exposed to sunlight, shade the product from the sunlight.
Otherwise failure or malfunction can result.
Keep within the specified ambient temperatures range.
Protection against freezing is necessary.
Avoid sudden temperature change even within specified temperature. Otherwise failure or malfunction can result.
Do not operate close to a heat source, or in a location exposed to radiant heat.
This can cause operating failure.

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No.PF※※-OMN0012-G
Adjustment and Operation
Connect a load before turning the power supply on.
Do not short-circuit the load.
Although error is displayed when the product load has a short circuit, generated over current lead to cause the
damage of the product.
Do not press the setting buttons with a sharp pointed object.
It may damage the setting buttons.
Supply the power when there is no flow.
The product is compulsory turned off for 3 seconds after the power is supplied.
Perform settings suitable for the operating conditions.
Incorrect settings can cause operational failure.
For details of each setting, refer to page 21 to 62 of this manual.
During the initial setting and flow rate setting, the product will switch the measurement output with the
condition before setting.
Confirm the output has no adverse effect on machinery and equipment before setting.
Stop the control system before setting if necessary.
Do not touch the LCD display during operation.
The display can vary due to static electricity.
Maintenance
Turn off the power supply, stop the fluid and check the safety before performing any maintenance.
There is a risk of unexpected malfunction.
Perform regular maintenance and inspections.
There is a risk of unexpected malfunction of components due to the malfunction of equipment and machinery.
Do not use solvents such as benzene, thinner etc. to clean the product.
They could damage the surface of the product and erase the indication on the product.
Use a soft cloth to remove stains. For heavy stains, use a cloth soaked with diluted neutral detergent and fully
squeezed, then wipe up the stains again with a dry cloth.

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No.PF※※-OMN0012-G
Model Indication and How to Order
: For the remote sensor, select analogue output: 1 to 5 V type. Applicable sensor: PF3W5--1(T)

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No.PF※※-OMN0012-G
Connector
NIL
C
No connector
Sensor connector (1 pc.)
Panel mount
NIL
T
No adapter
Panel mount adapter
V
Front protective cover + Panel mount adapter

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No.PF※※-OMN0012-G
Options/Part number
If an option is required independently, order using the following part number.
Option
Part number
Remarks
Panel mount adapter
ZS-26-B
Waterproof seal with screws
Front protective cover +
Panel mount adapter
ZS-26-C
Waterproof seal with screws
Protective cover only
ZS-26-01
Please order panel mount adapters etc. separately.
Power supply/output lead wire
ZS-40-W
Lead wire length 2 m
Sensor connector (e-con)
ZS-28-CA-4
1 pc.
Copy lead wire
ZS-40-Y
Possible to connect up to 10 slaves.

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No.PF※※-OMN0012-G
Summary of Product parts
Front
Element
Description
Main screen (2-colour display)
Displays the flow, the status of setting mode and error code.
Sub screen
Displays the accumulated flow, set value, peak/bottom value, fluid temperature and
line names.
Output display (Indicator LED)
Displays the output status of OUT1 and OUT2. When ON: Orange LED is ON.
Unit display
Displays the unit selected.
UP button
Selects a mode and the display shown at the sub screen, and increases the
ON/OFF set values.
SET button
Press this button to select mode and to confirm a set value.
DOWN button
Selects a mode and the display shown at the sub screen, and decreases the
ON/OFF set values.
Back

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No.PF※※-OMN0012-G
■Definition and terminology
Terms
Meaning
A
Accumulated flow
The total amount of fluid that has passed through the device. If an instantaneous flow of
10 L/min continues for 5 minutes, the accumulated flow will be 10 × 5=50 L.
Accumulated flow
external reset
A function to reset the accumulated flow to zero by using an external signal.
Accumulated pulse
output
A type of output where a pulse is generated every time a predefined accumulated flow
passes. It is possible to calculate the total accumulated flow by counting the pulses.
Analogue output
Outputs a value proportional to the flow rate. When the analogue output is in the range
1 to 5 V, it will vary between 1 to 5 V according to the rate of flow. The same for
analogue output of 4 to 20 mA.
C
Chattering
The problem of the switch output turning ON and OFF repeatedly around the set value
at high frequency due to the effect of pulsation.
Copy function
A function to copy flow rate setting values and function settings (excluding fine
adjustment of indication value).
D
Display flow range
The range of measured values that can be displayed for a product with a digital display.
F
Fluid temperature
Range of fluid temperature that can be measured by the product.
F.S.
(Full span, Full scale)
Stands for "full span" or "full scale", and indicates varied display valve and analogue
output range at rated value. For example, when analogue output is 1 to 5 V, F.S. = 5[V]
- 1[V] = 4[V], (ref. 1%F.S. = 4[V] x 1% = 0.04[V])
H
Holding of
accumulated flow
A function to store the accumulated flow value in the product’s internal memory. The
flow value will be stored at a set time interval of either 2 or 5 minutes. When the power
supply is turned on, the stored accumulated flow value will be displayed and
accumulated flow will continue from that point.
Hysteresis
The difference between ON and OFF points used to prevent chattering. Hysteresis can
be effective in avoiding the effects of pulsation.
Hysteresis mode
Mode where the switch output will turn ON when the flow is greater than the set value,
and will turn off when the flow falls below (set value –hysteresis value).
I
Instantaneous flow
The flow passing per unit of time. If it is 10 L/min, there is a flow of 10 Lpassing through
the device in 1 minute.
Internal voltage drop
The voltage drop across the product (and therefore not applied to the load), when the
switch output is ON. The voltage drop will vary with load current, and ideally should be
0 V.
K
Key-lock function
This function prevents the set value from being changed by mishandling.
M
Min. setting unit
The resolution of set and display values. If the minimum setting unit is 1 L/min, the
display will change in 1 L/min steps, e.g. 10…..11…..12 L/min.
O
Operating temp. range
Ambient temperature range in which product is operable.
P
Power saving mode
The condition in which the digital display turns off and the current consumption is
reduced.
R
Repeatability
Reproducibility of the display or analogue output value, when the measured quantity is
repeatedly increased and decreased.
Response time
Time from when the target flow is applied until the flow reaches 90% of the set value.

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No.PF※※-OMN0012-G
Terms
Meaning
S
Set flow range
The range of ON/OFF threshold values that can be set for those products with a switch
output.
Switch output
Output type that has only 2 conditions, ON or OFF. When in the ON condition an
indicator light will show, and any connected load will be powered. When in the OFF
condition, there will be no indicator light and no power supplied to the load.
T
Temperature
characteristics
Indicates the change in the display value and analogue output caused by ambient
temperature changes.
U
Unit selection function
A function to select display units other than the international unit (SI unit) specified in
the new Japanese measurement law. Flow can only be displayed by SI units in Japan.
W
Water hammer
A momentary steep pressure increase due the spread of pressure by closing a
contactor such as a valve for an extremely short time while there is a flow.
This pressure increase is known as water hammer or impact pressure.
Window comparator
mode
An operating mode in which the switch output is turned on and off depending on
whether the flow is inside or outside the range of two set values.

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No.PF※※-OMN0012-G
Mounting and Installation
■Installation
Mounting with panel mount adapter
Fix the panel mount adapter to the flow monitor with the screws supplied M3 x 8 L (2 pcs.).
Panel mount adapter (Part number: ZS-26-B)
Front protective cover (Part number: ZS-26-01)
1: The panel mount adapter can be rotated through 90 degrees for mounting.
2: The panel mount adapter should be fixed firmly with screws. Otherwise, fluids such as water may enter. After contact with the panel,
tighten screws by 1/4 to 1/2 turn.
Cut-out dimensions for panel mounting
: Refer to page 72 for panel cut-out dimensions.
Notice when removing the product
The product with panel mount adapter can be removed from the panel after removing the two screws, and
by disconnecting the hooks on both sides.
This can be done by inserting a suitable piece of thin card (as shown in the figure).
Pull the panel mount adapter to the front, and remove the flow monitor.
If the panel mount adapter is pulled forward with the hook caught, the product and the adapter may be
damaged.

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No.PF※※-OMN0012-G
■Wiring
Connecting and disconnecting of the sensor connector and power supply/output connector
When connecting, insert the connectors straight into the body until it clicks.
To remove the connectors, push the lever downward with your thumb, and pull the connectors out straight.
Sensor connector
Pin No.
Description
Wire colour
1
DC(+)
Brown
2
N.C. / temp. analogue input (1 to 5 V)
White
3
DC( - )
Blue
4
flow analogue input (1 to 5 V)
Black
Power supply/output connector
Description
Wire colour
COPY
Grey
OUT2
White
OUT1
Black
DC( - )
Blue
DC(+)
Brown

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No.PF※※-OMN0012-G
Connector connection
Connections should only be made with the power supply turned off.
Use separate routes for the Flow monitor wiring and any power or high voltage wiring. Otherwise,
malfunction may result due to noise.
Ensure that the FG terminal is connected to ground when using a commercially available switch-mode
power supply. When a switch-mode power supply is connected to the product, switching noise will be
superimposed and the product specification can no longer be met. This can be prevented by inserting a
noise filter, such as a line noise filter and ferrite core, between the switch-mode power supply and the
product, or by using a series power supply instead of a switch-mode power supply.
Connection of the sensor lead wire and connector
Strip the sensor lead wire as shown in the figure on the right.
(Refer to the following table for the connector and applicable wire size)
Lead wire table
SMC product No. (1 pc.)
Colour of cover
Insulator outside diameter
ZS-28-CA-4 (option)
Blue
1.15 to 1.35
ZS-28-C-1
Yellow
1.0 to 1.2
: The standard value of the insulation outside diameter ofAWG No.23 is 1.14, but ZS-28-CA-4 is recommended as an applicable
connector, taking outside diameter error into consideration.
Do not cut the insulator.
The core of the corresponding colour shown in the table below is put into the pin of the number stamped
on the connector for sensor connection to the back.
Pin No.
Wire colour 
1
Brown
2
White
3
Blue
4
Black
: When using the lead wire with M8 connector included with the PF3W5 series.
It checks that the above-mentioned preparation work has been performed correctly, and "A" part shown in
the left figure is pushed by hand and makes temporary connection.
"A" part’s center is straightly pushed in by tools, such as pliers.
Connector for sensor connection is cannot be reused once crimped for connection.
For the connection failure such as incorrect order of wire and incomplete insertion, please use the new
connector for sensor connection.
When the sensor is not connected correctly, "LLL" can be displayed.

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No.PF※※-OMN0012-G
Examples of Internal Circuit and Wiring
NPN2 output type
PF3W30A
PNP2 output type
PF3W30B
Maximum 28 V, 80 mA
Internal voltage drop 1 V or less
Maximum 80 mA
Internal voltage drop 1.5 V or less
NPN + Analogue output type
PF3W30C
NPN + Analogue output type
PF3W30D
PNP +Analogue output type
PF3W30E
PNP +Analogue output type
PF3W30F
Maximum 28 V, 80 mA
Internal voltage drop 1 V or less
C: Analogue output 1 to 5 V
Output impedance 1 kΩ
D: Analogue output 4 to 20 mA
Maximum load impedance
When power supply is 12 V: 300 Ω
When power supply is 24 V: 600 Ω
Maximum 80 mA
Internal voltage drop 1.5 V or less
E: Analogue output 1 to 5 V
Output impedance 1 kΩ
F: Analogue output 4 to 20 mA
Maximum load impedance
When power supply is 12 V: 300 Ω
When power supply is 24 V: 600 Ω

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No.PF※※-OMN0012-G
NPN + External input type
PF3W30G
PNP+ External input type
PF3W30H
Maximum 28 V, 80 mA
Internal voltage drop 1 V or less
External input: Voltage free contact
Reed or solid state input 30 ms
minimum duration
Maximum 80 mA
Internal voltage drop 1.5 V or less
External input: Voltage free contact
Reed or solid state input 30 ms
minimum duration
Analogue 2 output type
PF3W30J/PF3W30K
J: Analogue output 1 to 5 V
Output impedance 1 kΩ
K: Analogue output 4 to 20 mA
Maximum load impedance
When power supply is 12 V: 300 Ω
When power supply is 24 V: 600 Ω