SMC Networks PFM3 Series User manual

No.PF※※-OMJ0018-F
PRODUCT NAME
Digital Flow Switch
(Remote type monitor unit)
MODEL / Series / Product Number
PFM3##

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No.PF※※-OMJ0018-F
Table of Contents
Safety Instructions 2
Model Indication and How to Order 9
Summary of Product parts 12
Mounting and Installation 13
Installation 13
Wiring 15
Flow Setting 19
Function Setting 21
Default settings 21
F0 Selection of connected sensor Unit selection function 22
F1 Setting of OUT1 24
F2 Setting of OUT2 27
F3 Operating fluid 28
F4 Reference condition 29
F5 Response time 30
F6 Display mode 31
F7 External input 32
F8 Display resolution 35
F9 Auto-preset 36
F10 Accumulated value hold 38
F11 Analogue output filter 39
F12 Power saving mode 40
F13 Security code 41
F98 Setting of all functions 42
F99 Reset to the default settings 44
Other Settings 45
Maintenance 49
Troubleshooting 50
Error indication 52
Specification 53
Specifications 53
Characteristics data 55
Dimensions 56

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No.PF※※-OMJ0018-F
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※※-OMJ0018-F
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※※-OMJ0018-F
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.
■Safety Instructions
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, explosive or corrosive gas.
Fire or an explosion can result.
This product is not designed to be explosion proof.
■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
Stop the air supply, exhaust the residual pressure and verify that the air is released before performing
maintenance work
Otherwise an injury can result.

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No.PF※※-OMJ0018-F
Caution
■Do not touch the terminals and connectors while the power is on.
Otherwise electric shock, malfunction or damage to the product can result.
■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.
■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 used should be UL approved as follows.
Circuit (Class 2) of maximum 30 Vrms (42.4 V peak) or less, with UL1310 Class 2 power supply unit or UL1585
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 lifetime of the product.
Data stored by the product is not deleted, even if the power supply is cut off.
(Writing time: 1000000 cycles, Data duration: 20 years after power off.)
Reserve a space for maintenance.
Allow sufficient space for maintenance when designing the system.

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No.PF※※-OMJ0018-F
●Product handling
Installation
Tighten to the specified tightening torque.
If the tightening torque is exceeded the mounting screws and brackets may damaged.
If the tightening torque is insufficient, the product may be displaced and the mounting screws may come loose
(Refer to page 13 "Mounting and Installation".)
Do not apply excessive stress to the product when it is panel mounted
Otherwise damage to the product and disconnection from the panel mount can result.
Ensure that the FG terminal is connected to ground when using a commercially available switch-mode
power supply.
Do not drop, hit or apply excessive shock to the product.
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 49 N or less)
Hold the product body when handling, to prevent damage, failure or malfunction
Never mount a product in a location that will be used as a foothold.
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 of the connector.
Avoid repeatedly bending or stretching the lead wire, or placing heavy loads on it
Repeated bending stress or tensile stress can cause damage to the sheath, or breakage of the wires.
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 wire insulation material, whichever is larger.
Replace any damaged lead wire with a new one.
Wire correctly.
Incorrect wiring can damage 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 or noise and surge voltage from power and 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 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※※-OMJ0018-F
Environment
Do not use the product in area that is exposed to corrosive gases, chemicals, sea water, water or steam.
Otherwise failure or malfunction can result.
Do not use in a place where the product could be splashed by oil or chemicals.
If the product is to be 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 electrical surges are generated.
If there is equipment generates large electrical surges (solenoid type lifter, high frequency induction furnace, motor,
etc.) close to the product, damage or failure of the internal circuit may occur. Take measures against the surge
sources, and prevent the wires from coming into close contact.
Do not use a load which generates a surge voltage.
When a surge-generating load such as a relay or solenoid is driven directly, use a product 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.
Do not use the product in areas that are exposed to vibration or impact.
Otherwise failure or malfunction can result.
Do not use the product in the presence of a magnetic field.
This may lead to the malfunction of the product.
Prevent foreign matter such as wire debris from entering the product.
Otherwise failure or malfunction can result.
Do not use the product in areas subject to large temperature cycle.
Heating/cooling cycles other than ordinary changes in temperature can adversely affect the internal structure of the
product
Do not expose the product to direct sunlight.
If using in a location directly exposed to sunlight, use a suitable protective cover.
Otherwise failure or malfunction can result.
Keep within the operating temperatures range.
Operating temperature range is 0 to 50 °C.
Operation below the minimum temperature limit may cause damage or operation failure due to frozen moisture in
the fluid or air.
Avoid sudden temperature changes even within the specified temperature range.
Do not operate close to a heat source, or in a location exposed to radiant heat.
Otherwise malfunction can result.

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No.PF※※-OMJ0018-F
Adjustment and Operation
Connect load before turning on the power.
Do not short-circuit the load.
Although an error is displayed when the product load is short circuited, excess current may cause damage to the
product.
Do not press the setting buttons with a sharp pointed object.
This may damage the setting buttons.
Supply the power when there is no flow.
The output is off for 3 seconds after power is supplied.
Use settings suitable for the operating conditions.
Incorrect settings can cause operational failure.
(Refer to page 19 "Flow Setting".)
During the initial setting and any subsequent flow rate setting, the product will switch the output
according to the existing settings until the changes are complete.
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 during operation.
The display can vary due to static electricity.
Maintenance
Perform regular maintenance and inspections.
There is a risk of unexpected malfunction of components due to the malfunction of equipment and machinery.
Turn off the power supply, stop the supplied air, exhaust the residual pressure and verify the release of
air before performing maintenance.
There is a risk of unexpected malfunction.
Do not use solvents such as benzene, thinner etc. to clean the product.
They could damage the surface of the body and erase the markings on the body.
Use a soft cloth to remove stains.
For heavy stains, use a cloth lightly dampened with diluted neutral detergent, then wipe up any residue with a dry
cloth.

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No.PF※※-OMJ0018-F
Model Indication and How to Order

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No.PF※※-OMJ0018-F
Option 1
Nil
L
without lead wire
with power and output lead wire and connector
Option 2
Nil
E
without bracket
with bracket
B
D
with panel mount adapter
with panel mount adapter + front protective cover
: Each accessory is not assembled with the product, but shipped together.

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No.PF※※-OMJ0018-F
Option 3
Nil
F
without sensor connector
with sensor connector
: Each accessory is not assembled with the product, but shipped together.
Accessories/Part number
If an accessory is required separately, order using the following part numbers.
Part number
Description
Remarks
ZS-28-A
Power and output lead wire and connector
Length: 2 m
ZS-28-B
Bracket
Mounting screw (M3 x 5 L) 2 pcs.
ZS-28-C-1
Sensor connector
1 pc.
ZS-27-C
Panel mount adapter
Mounting screw (M3 x 8 L) 2 pcs.
ZS-27-D
Panel mount adapter + Front protective cover
Mounting screw (M3 x 8 L) 2 pcs.
ZS-27-01
Front protective cover

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No.PF※※-OMJ0018-F
Summary of Product parts
Front
Item
Description
LCD Display
Displays the flow value, setting mode, and error indication.
Four display modes can be selected: display always in red or green, or display
changing from green to red, or red to green, according to the output status
(OUT1).
Indicator LED (OUT1)
Indicates the output status of OUT1. LED is ON (Green) when OUT1 is ON.
When the accumulated pulse output mode is selected, the indicator LED will
turn OFF.
Indicator LED (OUT2)
Indicates the output status of OUT2. LED is ON (Red) when OUT2 is ON.
When the accumulated pulse output mode is selected, the indicator LED will
turn OFF.
button (UP)
Selects the mode or increases the ON/OFF set value.
Press this button to change to the peak display mode.
button (SET)
Press this button to change to another mode and to set a value.
button (DOWN)
Selects the mode or decreases the ON/OFF set value.
Press this button to change to the bottom display mode.
Back
Item
Description
Power and output lead wire and
connector
Cable to supply power and transmit output signals.
Sensor connector
Connector for sensor lead wire.

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No.PF※※-OMJ0018-F
Mounting and Installation
■Installation
Panel mounting
Fix the panel mount adapter to the monitor with the mounting screws (M3 x 8 L) supplied.
The monitor can be mounted on a panel with a thickness of 0.5 to 6.0 mm.
Refer to the dimension drawing (page 56) for panel cut-out dimensions.
Note when removing the monitor
The flow monitor with panel mount adapter can be removed from the installation by removing 2
screws and releasing the hooks at the sides, as illustrated.
Take care not to damage the product and panel mount adapter.

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No.PF※※-OMJ0018-F
Bracket mounting
Mount the bracket using the mounting screws (M3 x 5 L) supplied.
The required tightening torque is 0.5 to 0.7 Nm.
Install the product (with bracket) using the M4 screws (2 pcs.).
Bracket thickness is approximately 1.6 mm.
Refer to the dimension drawing of the bracket (page 57) for mounting hole dimensions.

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No.PF※※-OMJ0018-F
■Wiring
Wiring of connector
Connections should only be made with the power supply turned off.
Use separate routes for the product 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.
Attaching the connector to the sensor wire
Strip the sensor wire as shown.
Do not cut the insulator.
Insert the corresponding wire colour shown in the table into
the pin number printed on the sensor connector, to the
bottom.
Pin no.
Wire colour
Description
1
Brown
DC(+)
2
NC
-
3
Blue
DC(-)
4
Black
IN (1 to 5 V)
Check that the above preparation has been performed correctly, then part A shown should be pressed in
by hand to make temporary connection.
Part A should then be pressed in using a suitable tool, such as pliers.
The sensor connector cannot be re-used once it has been fully crimped.
In cases of connection failure such as incorrect order of wires or incomplete insertion, please use a new
connector.
If the sensor is not connected correctly "LLL" or "HHH" will be displayed.

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No.PF※※-OMJ0018-F
Connecting/Disconnecting
When mounting the connector, insert it straight into the socket, holding the lever and connector body, and
push the connector until the lever hooks into the housing, and locks.
When removing the connector, press down the lever to release the hook from the housing and pull the
connector straight out.
Power and output connector pin numbers (on the lead wire)
Wire colour
Description
Brown
DC(+)
Black
OUT1
White
OUT2
Grey
Analogue output/External input
Blue
DC(-)

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No.PF※※-OMJ0018-F
Internal circuit and wiring example
PFM30
NPN (2 outputs) + Analogue (1 to 5 V) output type
Max. 30 V, 80 mA
Internal voltage drop: 1 V or less
Analogue output: 1 to 5 V
Output impedance: approx. 1 kΩ
PFM31
NPN (2 outputs) + Analogue (4 to 20 mA) output type
Max. 30 V, 80 mA
Internal voltage drop: 1 V or less
Analogue output: 4 to 20 mA
Max. load impedance: 600 Ω(24 VDC)
Min. load impedance: 50 Ω
PFM32
NPN (2 outputs) + External input type
Max. 30 V, 80 mA
Internal voltage drop: 1 V or less
External input: No voltage input (reed switch or solid state), 30 ms or more

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No.PF※※-OMJ0018-F
PFM33
PNP (2 outputs) + Analogue (1 to 5 V) output type
Max. 80 mA
Internal voltage drop: 1 V or less
Analogue output: 1 to 5 V
Output impedance: approx. 1 kΩ
PFM34
PNP (2 outputs) + Analogue (4 to 20 mA) output type
Max. 80 mA
Internal voltage drop: 1 V or less
Analogue output: 4 to 20 mA
Max. load impedance: 600 Ω(24 VDC)
Min. load impedance: 50 Ω
PFM35
PNP (2 outputs) + External input type
Max. 80 mA
Internal voltage drop: 1 V or less
External input: No voltage input (reed switch or solid state), 30 ms or more

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No.PF※※-OMJ0018-F
Flow Setting
Measurement mode
The mode in which the flow is detected and displayed, and the switch function is operating.
This is the basic operating mode; other modes should be selected for set-point and other Function Setting
changes.
: The display will indicate [LLL] if a sensor is not connected.
Select the connected sensor in Function Selection mode.
Switch operation
When the flow exceeds the set value, the switch will turn ON.
When the flow falls below the set value by the amount of hysteresis or more, the switch will turn OFF.
If this condition, shown to the right, is acceptable, then keep these settings.