Digital Flow Switch
Operation Manual
PFM7
DIN rail mounting screw
Bracket
Joint screw
DIN rail mounting
bracket
Mounting hole
Spring washer
DIN rail is prepared by customer.
DIN rail is not suitable for port size F02 (G1/4).
•Install the product (with bracket) using the M3 screws (4 pcs.).
•Bracket thickness is approximately 1.2 mm.
DIN rail mounting (using ZS-33-R
)
•Mount the DIN rail mounting parts using DIN rail mounting screws and joint screws supplied.
•The required tightening torque of the DIN rail mounting screws and joint screws is
0.4±0.05 Nm.
Safety Instructions
Installation
Refer to the product catalogue or SMC website (URL http://www.smcworld.com) for more
information about panel cut-out and mounting hole dimensions.
Panel mounting
•Insert Panel Mount Adapter B (supplied as an accessory) into Section A of Panel Mount
Adapter A.
Push Panel Mount Adapter B from behind until the display is fixed onto the panel.
The pin of Panel Mount Adapter B engages the notched part of Panel Adapter section C
to fix the display.
Safety Instructions
Summary of Product parts
Mounting and Installation
IN
S
Indicator LED (OUT1)
Indicator LED (OUT2)
button (SET)
button (UP)
button (DOWN)
LED display
Flow adjustment valve
Lock ring
Body
Mounting hole
Connector
Piping port
(OUT side)
Piping port
(IN side)
Lead wire and connector
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.
Body
Lever
Lead wire and connector
Square groove
Connector body
CAUTION indicates a hazard with a low level of risk which, if
not avoided, could result in minor or moderate injury.
Caution:
Warning:
Danger:
WARNING indicates a hazard with a medium level of risk
which, if not avoided, could result in death or serious injury.
DANGER indicates a hazard with a high level of risk which, if
not avoided, will result in death or serious injury.
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.
LED 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).
button (UP)
Selects the mode or increases the ON/OFF set value.
Press this button to change to the peak display mode.
button (SET)
Selects the mode or decreases the ON/OFF set value.
Press this button to change to the bottom display mode.
The body of the product.
Body
Orifice mechanism to adjust the flow.
Flow adjustment valve
∗
Connected to the fluid inlet at IN side and to the fluid outlet at OUT side.
Element
Description
Thank you for purchasing an SMC PFM7 Series Digital Flow Switch.
Please read this manual carefully before operating the product and make sure you
understand its capabilities and limitations.
Please keep this manual handy for future reference.
To obtain more detailed information about operating this product,
please refer to the SMC website (URL http://www.smcworld.com) or
contact SMC directly.
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) and other safety
regulations.
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 disassemble, modify (including changing the printed circuit board) or repair.
An injury or failure can result.
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.
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 the fluid supply.
Do not apply fluid under leaking conditions.
Safety cannot be assured in the case of unexpected malfunction.
Do not touch the terminals and connectors while the power is on.
Otherwise electric shock, malfunction or damage to the product can result.
Warning
Caution
Do not use the product for flammable fluid.
A fire or explosion can result.
Only dry air, N
2
, CO
2
and Ar are applicable.
NOTE
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 UL 1310
class 2 power supply unit or UL 1585 class 2 transformer.
The product is a
approved product only if it has a
mark on the body.
Piping port
button (DOWN)
Press this button to change to another mode and to set a value.
Used to lock the flow adjustment valve.
Lock ring
∗
Used to mount the product on a DIN rail or directly to a panel.
Mounting hole
Panel Mount
Adapter A
Panel
Panel Mount
Adapter B
Push
Insert
Bracket
Section A
Section C
Bracket mounting
•Mount the bracket using the mounting screws supplied.
•The required tightening torque is 0.5±0.05 Nm.
Without flow adjustment valve
(using ZS-33-M)
With flow adjustment valve
(using ZS-33-MS)
Mounting
screws
Mounting
screws
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.
<Operation>
∗:
The Product outputs will continue operating during setting.
1. Press the
button once in
measurement mode.
[P_1] or [n_1] and the set value are
displayed in turn.
2. Press the
or
button to change the set value.
The
button is to increase and the
button is to decrease the set value.
•Press the
button once to decrease
by one digit, or press it continuously
to keep decreasing the set value.
3. Press the
button to complete the setting of OUT1.
For models with 2 outputs, [P_2] or [n_2] will be displayed. Set as above.
Displayed in turn
Normal output
Reversed output
Zero clear of display
The display is reset to zero when
and
are pressed simultaneously for 1 second.
For the initial operation, always perform zero clear with no flow applied.
Blue
Black
DC(-)
OUT1
White
Brown
OUT2
Analogue output
External input
DC(+)
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.
Power is supplied
approx. 1 second
approx. 1 second
approx. 1 second
The unit specification is displayed
The product identification is displayed
The flow range is displayed
Measurement mode
(The output is OFF
for this period)
approx. 3 seconds
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.
Switch ON
Switch OFF
Set value
P_1
Time [s]
F
lo
w
[
L
/m
in
]
Hysteresis
H_1
•Press the
button once to increase
by one digit, or press it continuously
to keep increasing the set value.
Default setting
The default settings are provided as follows. If these settings are acceptable, retain for use.
Item
[F 0]
[F 1]
[Un i] Unit selection function
[oU1] Output mode (OUT1)
[1ot ] Reversed output (OUT1)
[P_1] Input of set value (OUT1)
[H_1] Setting of Hysteresis (OUT1)
Default setting
[ L] L/min
[HYS] Hysteresis mode
[1_P] Normal output
Medium value of rated flow range
[
3] 3% of rated flow range
Other Settings
Peak / Bottom value display
Zero Clear
Key lock function
To set each of these functions, refer to the SMC website (URL http://www.smcworld.com)
for more detailed information, or contact SMC.
Maintenance
How to reset the product after a power cut or forcible de-energizing
The setting of the product will be retained as it was before a power cut or de-energizing.
The output condition is also basically recovered to that before a power cut or de-energizing,
but may change depending on the operating environment.
Therefore, check the safety of the whole installation before operating the product.
Troubleshooting
∗
: If the error cannot be reset after the above measures are taken, then please contact SMC.
Error indication
Flow error
The flow has exceeded the upper limit of the flow
display range.
Reduce the flow.
Error name
Error display
Error type
Troubleshooting method
Over current
error
The switch output load current (OUT1) has
exceeded 80 mA.
The switch output load current (OUT2) has
exceeded 80 mA.
Turn off the power supply
and remove the cause of
the over current. Then
supply the power again.
System
error
The product has lost the factory adjustment
settings. The internal circuit may be damaged.
Stop operation immediately
and contact SMC.
Zero clear
error
Perform the zero clear
function again under no flow
conditions.
Accumulated
flow error
Accumulated
flow displayed
(flashing)
Accumulated flow range has been exceeded.
The zero clear function has been performed while
the fluid is flowing. "Er4" will be displayed for 1
second.
System error.
The product has failed to store the data, or the
internal circuit may be damaged.
Turn the power off and turn
it on again, then repeat the
Function Setting.
There is a flow of 5% or more in the wrong
direction.
Ensure the flow is in the
correct direction.
Reset the accumulated flow.
(pressing
and
buttons
simultaneously for 1 second
or more)
Specifications / Outline with Dimensions
Refer to the product catalogue or SMC website (URL http://www.smcworld.com) for more
information about the product specifications and outline dimensions.
Note: Specifications are subject to change without prior notice and any obligation on the part of the manufacturer.
© 2011 SMC Corporation All Rights Reserved
Akihabara UDX 15F, 4-14-1, Sotokanda, Chiyoda-ku, Tokyo 101-0021, JAPAN
Phone: +81 3-5207-8249 Fax: +81 3-5298-5362
URL http://www.smcworld.com
Function Setting
Press button for
2 seconds or longer.
Measurement mode
Function selection mode
Function Setting
Connector for electrical connections.
Connector
Piping
•Ensure that the metal piping attachments are
tightened to the required torque (refer to the table right).
•If the tightening torque is exceeded, the product
can be broken. If the tightening torque is insufficient,
the fittings may become loose.
•When connecting piping to the product, a spanner
should be used on the metal piping attachment only.
Using a spanner on other parts may damage the
product.
•Avoid any sealing tape from entering inside the piping.
•Ensure that there is no leakage from loose piping.
Rc (NPT)1/8
Rc (NPT)1/4
Nominal thread size
7 to 9 Nm
12 to 14 Nm
Required torque
Rc (NPT)1/8
Rc (NPT)1/4
G1/4
G1/4
Nominal thread size
17 mm
21 mm
Width across flats of
attachment
•For one-touch fittings, insert the tube until it bottoms out,
to ensure it cannot be pulled out.
•Insertion with excessive force can cause damage.
•Ensure that there is no leakage after piping.
•Use this product within the specified operating pressure
and temperature ranges.
•Proof pressure is 1.0 MPa.
Metal piping
attachment
Function selection mode
In measurement mode, press the
button
for 2 seconds or longer, to display [F 1].
(when using a product with unit selection
function, [F 0] will be displayed).
The [F
] indicates the mode for changing
each Function Setting.
Press the
button for 2 seconds or longer
in function selection mode to return to
measurement mode.
Lead wire to supply power and transmit output signals.
Lead wire and connector
∗
: The table shows the specifications when a flow adjusting valve is included.
[CoL] Display colour
[SoG] ON: Green OFF: Red
[F 2]
[oU2] Output mode (OUT2)
[2ot ] Reversed output (OUT2)
[P_2] Input of set value (OUT2)
[H_2] Setting of Hysteresis (OUT2)
[HYS] Hysteresis mode
[2_P] Normal output
Medium value of rated flow range
[
3] 3% of rated flow range
[F 3]
[FLU] Operating fluid
[r EF] Reference condition
[eES] Response time
[A ir ] dry air, N
2
[Anr
.
] Standard condition
[1.00] 1 second
[dSP] Display mode
[ inP] External input
[ inS] Instantaneous flow
[ r_r ] Accumulated flow external reset
[dr E] Display resolution
[PrS] Auto-preset
[EEP] Accumulated value hold
[1E2] 100-split
[oFF] Manual
[oFF] OFF
[AFL] Analogue output filter
[Eco] Power saving mode
[P in] Security code
[ on] With filter
[oFF] Unused
[oFF] Unused
[ALL] Setting of all functions
[ in i ] Reset to the default settings
[oFF] Unused
[oFF] Unused
[F 4]
[F 5]
[F 6]
[F 7]
[F 8]
[F 9]
[F10]
[F11]
[F12]
[F13]
[F98]
[F99]
Refer to the SMC website (URL http://www.smcworld.com) for more information about
troubleshooting.
Operator
This operation manual is intended for those who have knowledge of machinery
using pneumatic equipment, and have sufficient knowledge of assembly,
operation and maintenace 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.
•The switch can be mounted on a panel with a thickness of 1 to 3.2 mm.
