SMC Networks PFA Series User manual
How to Order
PFA5
Remote Type
Sensor Unit
Specifications
10
10
50
11
21
51
Flow rate range
1 to 10l/min
5 to 50l/min
10 to 100l/min
20 to 200l/min
50 to 500l/min Nil
N
F
Thread type
Rc
NPT
G
Nil
N
Wiring specification
3m lead wire with connector
Without lead wire
01
Symbol
01
02
03
04
Port size
1/8
1/4
3/8
1/2
10
50
100
200
500
Applicable models
Flow rate (l/min)
PFA510, PFA550
PFA511, PFA521
PFA551
1/8, 1/4 3/8 1/2
200g (without lead wire)
Model
Measured fluid
Detection type
Flow rate measurement range
Operating pressure range
Proof pressure
Pressure loss
Operating temperature range
Linearity Note 1)
Repeatability
Power supply voltage
Current consumption
Weight
Enclosure
Port size (Rc, NPT, G)
PFA510 PFA550
1 to 10l/min 5 to 50l/min
Note 1) The system accuracy will be adjusted to ±5% F.S. or less when combined with PFA3.
Note 2) The system accuracy will be adjusted to ±1% F.S. or less when combined with PFA30.
∗Flow rate unit measured under the following conditions: 0°C and 101.3kPa.
Dry air, N2
Heater type
10 to 100l/min
0 to 0.5MPa
1.0MPa
3kPa (at 100
l
/min)
0°to 50°C (with no condensation)
Temperature
characteristics
3kPa (at 50l/min)
100mA or less
20 to 200l/min 50 to 500l/min
10kPa (at 200l/min) 30kPa (at 500l/min)
±20% F.S. or less
±1% F.S. or less
±25% F.S. or less
±1% F.S. or less Note 2)
±2% F.S. or less (15°to 35°C)
±3% F.S. or less (0°to 50°C)
IP65
240g (without lead wire) 110mA or less
PFA511 PFA521 PFA551
12 to 24VDC (ripple ±10% or less)
Port
size
For Air
Digital Flow Switch
Series PFA
3
Sensor Unit Construction
Parts list
No.
1
2
3
4
5
Description
Attachment
Seal
Mesh
Body
Sensor
Parts list
Material
ADC
NBR
Stainless steel
PBT
PBT
Material
ADC
NBR
PBT
Stainless steel
PBT
PBT
PFA710, PFA750
PFA510, PFA550
PFA711, PFA721, PFA751
PFA511, PFA521, PFA551
Flow direction
Flow direction
No.
1
2
3
4
5
6
Description
Attachment
Seal
Spacer
Mesh
Body
Sensor
Operating Unit Descriptions
Output (OUT1) Indicator: Green
Output (OUT2) Indicator: Red
LED Display
UP Button ( Button)
SET Button (Button)
DOWN Button (Button)
DOWN
U P
OUT2OUT1
SET
RESET Buttons
Error Correction
Take the following corrective solutions when errors occur.
Press the and buttons simulta-
neously to activate the RESET func-
tion.
This clears the unit when an
abnormality occurs and resets the
accumulated flow display to "0".
Lights up when OUT1 is ON.
Blinks when an overcurrent error
occurs on OUT1.
Displays the real-time flow rate,
accumulated flow, and set value.
The mark blinks when the
accumulated flow is being
measured.
Use this button to decrease a set
value.
Use this button to change a set
value or any of the modes.
Use this button to increase a set
value.
Lights up when OUT2 is ON.
Blinks when an overcurrent error
occurs on OUT2.
LED display Contents
A current of more than
80mA is flowing to OUT1.
A current of more than
80mA is flowing to OUT2.
The setting data has
changed for whatever
reasons.
The flow rate is over the
flow rate measurement
range (for air only).
Solution
Check the load and wiring
for OUT1.
Check the load and wiring
for OUT2.
Perform the RESET
operation, and reset all
data again.
Reduce the flow rate until it
is within the flow rate
measurement range, using
an adjustment valve.
Series PFA
4
Set the display unit. Note 1)
Use the and buttons to switch.
(Refer to Table 1 .)
Flow Rate Setting
Setting procedure
Set the flow rate auto-
matically.
Initial setting
YES
NO
YES
NO
"P"
"n"
OUT1 Output
mode
≥
≥
P_1P_2
P_2
n_1n_2
n_1 n_2
HH
HH
H (fixed hysteresis) = 3 digits
H (fixed hysteresis) = 3 digits
∗OUT2 is the same.
OFF
ON
High flow rate →
High flow rate →
High flow rate →
High flow rate →
OFF
ON
OFF
ON
OFF
ON
•Hysteresis mode
•Hysteresis mode
Display
Real-time flow rate
l/min
CFM x 10-², CFM x 10-¹
Accumulated flow
l
ft³x 10-¹
Output type
Initial setting
Manual flow
rate setting
Manual flow
rate setting Key lock
mode
Normal
operation
P_1
Set the display mode.
Use the button to switch.
: Display for real-time flow rate
: Display for accumulated flow
1. Initial Setting Mode
2. Selection of the Display Mode
3. Selection of Display Units
Set the output mode for OUT2.
Use the button to switch the output
mode for OUT2.
: Non-inverted output
: Inverted output
4. Selection of OUT1 Output Mode 5. Selection of OUT2 Output Mode
Press the SET button
to complete the setting.
For air
CFM = ft³/min
Display
Real-time flow rate
l/min
GPM
Accumulated flow
l
gal (US)
For water
GPM = gal (US)/min
Unit number
OUT1 OUT2 OUT1 OUT2 OUT1 OUT2
OUT1 OUT2 OUT1 OUT2
Press the SET button.
SET
Press the SET button.
SET
SET SET
Press the SET button.
Note) Operation is the same for the integrated display type and the remote type (display unit).
Table 1 Table 2
Set the output mode for OUT1.
Use the button to switch the output
mode for OUT1.
: Non-inverted output
: Inverted output
(Refer to Table 2 .)
Note 1)
For -M (fixed SI unit)
Even if button is pressed
during operation, mode
will not be switched.
Initial setting: Sets the
display mode (real-time
flow rate/accumulated
flow), unit mode, and
output mode (non-invert-
ed/inverted). Auto preset
Data that is automatically
set with the auto preset
mode can be calibrated.
•Window comparator
mode
•Window comparator
mode
Displays the flow rate
and performs switch op-
eration.
Note 1) For digital flow switch with unit switching function
(Fixed SI unit [l/min or l] will be set for the type without
the unit switching function.)
Note 2) Output mode is set to inverted output at the factory
before shipment.
Set the flow rate that
performs switch output.
Press the SET button and hold for 1
second or longer.
Release the SET button once the
display changes from to
or .
Note 2)
For Air
Digital Flow Switch
Series PFA
5
Flow rate setting mode (manual)
Flow rate setting mode (auto preset)
Flow Rate Setting
Press the SET button.
SET
OUT1 OUT2 OUT1 OUT2 OUT1 OUT2
OUT1 OUT2 OUT1 OUT2 OUT1 OUT2
OUT1 OUT2 OUT1 OUT2 OUT1 OUT2
OUT1 OUT2 OUT1 OUT2 OUT1 OUT2
Press the SET button.
SET
Press the SET button.
SET
Press the SET button
to complete the setting.
SET
Press the SET button.
SET SET
Press the SET button.
SET
OFF point
ON point = C, C1
OFF point = C –3 digits, C1 –3 digits,
(1 digit is the minimum setting unit.)
1. Set Value Input
Mode (Manual) 2. Manual Mode
Setting 3. Setting the first (1)
Value for OUT 1
4. Setting the second (2)
Value for OUT 1
5. Setting the first (1)
Value for OUT2
6. Setting the second (2)
Value for OUT 2
1. Set value Input
Mode 2. Setting in the Auto
Preset Mode 3. Auto Preset
Preparations
This mode prepares equipment for
the OUT1 setting. Flow for switch
output will start.
When the OUT1 setting is not
required, press the and
buttons simultaneously in this
mode.
Press the SET button, and release it
as soon as is displayed.
6. OUT2 Auto Preset
5. Auto Preset
Preparations
4. OUT1 Auto Preset
When the SET button is pressed at
this point, the optimum value will be
calculated and input automatically.
and the input value will be
alternately displayed.
Hysteresis
(3 digits)
ON point
(C, C1)
When the SET button is pressed at
this point, the optimum value will cal-
culated and input set automatically.
and the input value will be alter-
nately displayed.
Set the first (1) value for OUT1.
The value you set and (or )
will be alternately displayed.
button: Increases the set value.
button: Decreases the set value.
Press the SET button when is
displayed.
Press the SET button.
(Refer to Table 2 for the relationship
between each value and the switch
output.)
Set the second (2) value for OUT1.
The value you set and (or )
will be alternately displayed.
button: Increases the set value.
button: Decreases the set value.
Set the first (1) value for OUT2.
The value you set and (or )
will be alternately displayed.
button: Increases the set value.
button: Decreases the set value.
Set the second (2) value for OUT2.
The value you set and (or )
will be alternately displayed.
button: Increases the set value.
button: Decreases the set value.
Press the button to switch the
display to .
Press the SET button
to complete the setting.
Prepares equipment for the OUT 2
setting.
When the OUT2 setting is not
required, press the and
buttons simultaneously in this
mode.
Series PFA
6
Other functions
•Switching the flow rate range of the remote type (for air)
SET
Start of Accumulation
•Accumulated flow function
Stopping Accumulation
Use the button to display .
Start of
Key Lock Function
•Key lock mode
Release of
Key Lock Function
Prevents incorrect operations of the button control.
SET
SET
OUT1 OUT2 OUT1 OUT2
OUT1 OUT2 OUT1 OUT2
OUT1 OUT2 OUT1 OUT2
OUT1 OUT2 OUT1 OUT2
Table 3
Display
Flow rate range
1 to 10l/min
5 to 50l/min
10 to 100l/min
20 to 200l/min
50 to 500l/min
Applicable model
Table 3
For PFA30
For PFA31
Start accumulation.
Press the SET button while
pressing the button at the
same time.
The mark blinks and accu-
mulation begins.
Press the SET button while
pressing the button at the
same time.
The display fixes upon the current
accumulated value and stops. To
start further accumulation from
this point, press the SET button
while pressing the button at the
same time.
Press the and buttons
simultaneously and hold for 2
seconds or longer to clear the
display.
Press the
SET button
to complete
the setting.
Press the SET button and hold
it for 3 seconds or longer.
Release the SET button when
the display changes from to
and displays .
Press the SET button and
hold it for 3 seconds or longer.
Release the SET button when
is displayed.
Switching
Flow Rate Range
Press the SET button and hold
it for 4 seconds or longer. the
values shown in will
be displayed.
Up to (l) of flow can be
accumulated, but normally only
the lower 3 digits are dis-
played. Press the button to
verify the upper 3 digits.
Press the button to verify
the real-time flow rate during
accumulation.
Press the
SET button
to complete
the setting.
Use the button to display .
Use the button to select
the desired flow rate range.
Press the SET
button to complete
the setting.
For Air
Digital Flow Switch
Series PFA
7
Dimensions: Remote Type Sensor Unit for Air
17 6
56 1.6
24
2-Port size
4(43.5)
42
43
2-ø3.4
21
43
Connector pin numbers
Pin no.
1
2
3
4
Pin description
DC(+)
NC
DC(–)
OUT
(43.5)426
2-Port size 30
62 23 1.6
Main circuit
Brown (1) DC(+)
Black (4) OUT
Blue (3) DC(–)
Wiring
Flow direction
Flow direction
∗Use this sensor by connecting to SMC remote type
display unit Series PFA3.
(1), (3), and (4) are connector pin numbers.
, , and are terminal numbers for Series
PFA3.
PFA510, PFA550
48.2
60
98
44
54
34
40
50
4-ø4.5
82
PFA511, PFA521, PFA551
4-ø4.5
34
54
44
76.2 116
40
50
9
For Air
Digital Flow Switch
Series PFA
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2
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