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7

Operation

Warning

Danger of crushing! Danger of shearing!
The piston rod moves fast and with great force. Body parts in the movement
range of the piston can be crushed or severed.
 Do not reach into the movement range of the piston rod.
 Do not place foreign objects in the movement range of the piston rod.

 Observe the operating conditions.
 Observe permitted limit values.

8

Maintenance and care

If used as intended, the product is maintenance-free.

9

Disassembly

Note

Disassembly only by qualified specialized personnel.

1. Disconnect the drive from the power supply (operating medium, electric power).
2. Loosen the mounting screws ( Fig. 5, 

1

 ) and carefully remove the housing.

3. Disconnect electrical and pneumatic connection.
4. Loosen the mounting screws and remove the drive.

Loosening a hose

1. Press down on the disconnect ring (blue) of the push-in fitting and hold it down.
2. Carefully pull the tube out of the push-in fitting.
Cut off the damaged part before using the hose further.

10

Disposal

 Observe the local specifications for environmentally friendly disposal.
 Dispose of the product in an environmentally friendly manner. When doing this,

also take residual media into account (potential recycling of hazardous waste).

11

Fault clearance

Malfunction

Possible cause

Remedy

Piston rod does
not move in the
desired direction

Displacement encoder cable incorrectly connected
at positioning controller or DFPI 
(e.g. connections at pin 1 and pin 3 interchanged).

Correct the connection

Supply ports connected incorrectly

Correct the connection

Fig. 8

12

Technical data

DFPI-…

-100

-125

-160

-200

-250

-320

Type of mounting

Mounting interface in accordance with ISO 15552

Spanner size of the piston rod

22

27

36

36

46

55

Stroke

[mm]

40 … 990

Min./max. stroke allowance

[mm]

0 … 4

Design

Piston rod, cylinder barrel

Cushioning

No cushioning

Mounting position

Any

Mode of operation

Double-acting

Position sensing

Via integrated displacement encoder

Measuring principle of displacement enco­
der

Potentiometer

Operating voltage range

[V DC]

0 … 15

Independent linearity

[%
FS]

±0.04

Hysteresis

[mm]

0.33

Repetition accuracy

[mm]

±0.12

Resistance value of displacement encoder (on the T.E.P.) dependent on the stroke length 

1)

š

 290 mm

[kΩ]

5

,

 290 mm to 590 mm

[kΩ]

10

,

 590 mm to 990 mm

[kΩ]

20

Recommended current at the displacement encoder

– Recommended contact current

[

ì

A]

 0.1

– Max. short-time contact current

[mA]

10

Electrical connection

3-pin; straight plug; screw terminal

Pneumatic connection

For tubing outside 

 8 mm

Operating pressure

[bar]

3 … 8

Nominal operating pressure

[bar]

6

DFPI-…

-100

-125

-160

-200

-250

-320

Operating medium

Compressed air in accordance with ISO 8573-1:2010
[7:4:4]

Note on the operating medium

Lubricated operation possible (in which case lubric­
ated operation will always be required)

Protection class - in mounted status

IP65, IP67, IP69K, NEMA 4

Ambient temperature

[°C]

–20 … +80

Corrosion resistance class

CRC 3

Product weight

– Basic weight with 0 mm stroke

[g]

4900

7500

12800

18100

31100

57700

– Additional weight per 10 mm

stroke

[g]

90

134

200

238

358

582

– Moving mass with 0 mm stroke

[g]

1060

1900

3700

4800

9300

16500

– Additional weight of moving

load per 10 mm stroke

[g]

28

53

89

89

134

227

Information on materials

– Cylinder barrel

Anodised wrought aluminium alloy

– Cap (end cap)

Wrought aluminium alloy, coated

– Bottom cap (bearing cap)

Coated die-cast aluminium

– Tie rods

High-alloy stainless steel

– Piston rod

High-alloy stainless steel

– Flange screws/nuts

Coated steel

– Piston rod seal

PUR

NBR

– Static seal

NBR

Note on materials

PWIS-free, RoHS-compliant

Vibration resistance in accordance with
DIN/IEC 68, Part 2-6

0.35 mm travel at 0 … 60 Hz;
5 g acceleration at 0 … 150 Hz

Continuous shock resistance in accordance
with DIN/IEC 68, Part 2-82

±15 g at 6 ms duration;
1000 shocks per direction

1)

T.E.P. = theoretical electrical path

Fig. 9

Max. permissible lateral force for static application

Note

In controlled operation, adjustment of the max. lateral force to the type of con­
trol may be required.

Horizontal installation

Vertical installation

Ø 100

Ø 125

Ø 160/200

Ø 250

Ø 320

Fig. 10

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