Switching the DFPI off
Switch the power supplies off in the following sequence to ensure safe venting
of the integrated valve manifold:
1. First switch off the operating voltage supply.
2. Only after that switch off the compressed air supply.
Only when the drive is vented can the piston rod be shifted manually, for example
to push the piston rod in for safe transport.
10
Maintenance and care
If used as intended in the operating instructions, the device will be free of mainten
ance.
11
Disassembly and repair
Warning
Danger of crushing! Uncontrolled advance of piston rod.
When the power supplies are switched off, if the compressed air supply is
switched off first and only after that the operating voltage supply, in case of error
(e.g. defective valve manifold) there may be continuous excess pressure in a
cylinder chamber. During dismantling the linear drive can then advance unexpec
tedly, thus crushing people's body parts.
Switch the energy supplies off in the following sequence to allow the integ
rated valve manifold to vent the drive:
1. First switch off the operating voltage supply.
2. Only after that, switch off the compressed air supply.
Warning
Danger from parts flying through the air!
If there is still excess pressure in a cylinder chamber despite the compressed air
supply being switched off, when a cylinder end cap is loosened it can tear off, fly
through the air and injure people.
Do not dismantle cylinder end cap! The product may be overhauled only by our
repair service.
Disassembly
1. First switch the operating voltage supply off and then the compressed air supply
to allow the integrated valve manifold to vent the drive.
2. Remove the slide gate from the piston rod.
3. Remove the screws on the flange of the process valve or penstock valve.
4. Remove the drive (if necessary including mounting adapter and coupling exten
sion).
Repair
Make sure that the product is overhauled only by our repair service.
12
Troubleshooting
Malfunction
Possible cause
Remedy
The DFPI closes the
process valve, even
though a different
setpoint is specified.
Operating voltage supply or the analogue
setpoint is outside of the permitted range
(e.g. in the event of a wire break); the DFPI
moves to the safety position.
Check operating voltage
supply and analogue set
point
Even though the energy
supply is switched off,
the piston rod cannot
be shifted manually.
The drive has not been vented because
the compressed air supply was switched
off first, and then the operating voltage
supply.
First switch off the oper
ating voltage supply, and
then the compressed air
supply.
Current at the analogue
output
3.5 mA
Device error
Check operating voltage
supply, operating
pressure and analogue
setpoint
Current at the analogue
output = 21.0 mA
The device must be taught
Initialize device
Current at the analogue
output = 21.5 mA
Device is in teach-in status
–
Fig. 15
13
Technical data
DFPI-...-ND2P-C1V-...-A
-100
-125
-160
-200
-250
-320
Based on standard
DIN 3358
Type of mounting
On flange in accordance with DIN 3358
Flange hole pattern
F07
F10
F10, F14
Width across flats, spanner flat
on the piston rod
22
27
36
Design
Piston rod, cylinder barrel
Cushioning
No cushioning
Mounting position
Any
DFPI-...-ND2P-C1V-...-A
-100
-125
-160
-200
-250
-320
Mode of operation
Double-acting
Position sensing
With integrated displacement encoder
Measuring principle of
displacement encoder
Potentiometer
Positioning accuracy
[% FS]
1.0
Repetition accuracy
[% FS]
±1.0
Hysteresis
[% FS]
±1.0
Size of the dead zone
[% FS]
1.0
Accuracy of analogue output
[% FS]
±1
Analogue output response
time
[ms]
< 100
Max. load of the analogue
output
[Ω]
Max. 600
Max. load of the analogue
input
[Ω]
Max. 500
Electrical connection
5-pin; straight plug; screw terminal
Pneumatic connection
– DFPI-...-ND2P-C1V
G¼
– DFPI-...-ND2P-C1V-P...
For tube outside-
8 mm
For tube outside-
10 mm
Operating pressure
[bar]
3 … 8
Nominal operating pressure
[bar]
6
Operating medium
Compressed air in accordance with
ISO 8573-1:2010 [7:4:4]
Note on the operating
medium
Operation with lubricated medium possible (in which
case lubricated operation will always be required)
Relative air humidity
[%]
0 ... 100 condensing
Operating voltage range
[V DC]
24 ±10 %
Nominal operating voltage
[V DC]
24
Max. current consumption
[mA]
220 (with 24 V DC)
Idle current
[mA]
40 (with 24 V DC)
Max. cable length
[m]
15
Reverse polarity protection
For operating voltage, setpoint value,
initialisation connection
Setpoint input
[mA]
4 ... 20
Analogue output
[mA]
4 ... 20
Initialisation input
[V DC]
22.8 ... 26.4; I = 11 mA with 24 V DC
Seal closing function
(leak-proof function)
[mA]
4.0 mA ≤ I ≤ 4.2 mA
19.8 mA ≤ I ≤ 20 mA
Degree of protection -
in mounted status
IP65, IP67, IP68, IP69K, NEMA 4
Stroke
[mm]
40 … 990
Stroke reserve
[mm]
3
4
Ambient temperature
[°C]
–5 … +50
Use in exterior
C1 – weather-protected areas in accordance with
IEC 60654
Product weight
Basic weight with 0 mm stroke
– DFPI-...-ND2P-C1V
[g]
4 671
7 693
9 099
18 358
29 956
45 200
– DFPI-...-ND2P-C1V-P
[g]
5 237
8 259
9 665
18 924
30 552
45 766
– Additional weight of mov
ing load per 10 mm stroke
[g]
27
52
52
87
87
87
Moving mass with 0 mm
stroke
[g]
1228
1944
2250
4722
7059
11417
– Additional weight per
10 mm stroke
[g]
80
145
159
187
325
399
– Additional weight of dis
placement encoder per
10 mm
[g]
2
2
2
2
2
2
Materials
– Cylinder barrel
Anodised wrought aluminium alloy
High-alloy
stainless steel
– Cap (end cap)
Anodised wrought aluminium alloy or
Anodised and painted wrought aluminium alloy or
Cast aluminium painted
– Bottom cap (bearing cap)
– Piston rod
High-alloy stainless steel
– Screws
Steel
1)
– Seals
NBR,
PU
NBR
Note on materials
RoHS-compliant, contains paint-wetting impairment sub
stances
Vibration resistance in accordance
with DIN/IEC 68, Part 2-6
0.35 mm path at 10 ... 60 Hz;
5 g acceleration at 60 ... 150 Hz
Continuous shock resistance in ac
cordance with DIN/IEC 68, Part 2-82
±15 g at 6 ms duration, 1000 shocks per direction
Certification
RCM
CE certification (see declaration of
conformity
è
www.festo.com)
In accordance with EU EMC Directive
2)
In accordance with EU Explosion Protection Directive
(ATEX)
3)
1)
Steel and high-alloy stainless steel
2)
The device is intended for use in an industrial environment. Outside of industrial environments, e.g. in
commercial and mixed-residential areas, actions to suppress interference may have to be taken.
3)
Certification-specific special documentation must be considered (
è
www.festo.com/sp).
Fig. 16
