The integrated displacement encoder transmits the current position to the internal
positioner as an analogue signal. The positioner cyclically compares the setpoint
and actual positions and transmits appropriate positioning signals to the integ
rated valve block for positioning control.
The valve block controls the desired direction of movement by pressurising the one
cylinder chamber and simultaneously venting the other cylinder chamber.
The current position is provided as an analogue current signal (4 … 20 mA) via the
actual value output and can be evaluated by a higher-order controller if needed.
The drive has a factory-defined safety position. It responds as follows if the operat
ing voltage supply or the analogue setpoint is outside of the permitted range (e.g.
in the event of a wire break):
– DFPI-…-ND2P-C1V-NB3P-A:
Piston rod is advanced (close process valve).
– DFPI-…-ND2P-C1V-NB3P-R-A:
Piston rod is retracted (process valve opens).
4
Transport and storage
Warning
Danger of crushing! Danger of shearing!
The product weighs up to 60 kg, depending on the product version.
Body parts can be crushed or cut off if the product falls.
Use appropriate load handling equipment.
Do not use the air duct as a handle for carrying.
When shipping used products: Comply with all legal requirements for handling
hazardous substances and transporting dangerous goods. For return to Festo
è
Chapter 2.
Remove all attachments.
Store the product in a cool, dry, UV- and corrosion-protected environment. En
sure storage times are short.
5
Installation
Note
Installation should only be conducted by qualified specialized personnel.
5.1 Mechanical installation
It can be mounted in any position.
1. Remove all transport packaging. The material used in the packaging has been
specifically chosen for its recyclability (exception: oil-impregnated paper =
residual waste).
2. Fasten the drive with the mounting screws on the bearing cap/end cap (mounting
interface in accordance with ISO 15552). Tighten the mounting screws evenly.
– Tightening torques
è
Fig. 4.
Piston diameter
Tightening torque [Nm]
100
10
125
24
160
70
200
70
250
150
320
250
Fig. 4
When using additional proximity sensors
Note
When linear drives are installed too close to each other, the cylinder magnet can
disturb the proximity sensor on the adjacent linear drive.
1. Fasten sensor bracket to the tie rod.
– Tightening torque 0.6…1 Nm.
2. Mount proximity sensor (
è
Proximity sensor operating instructions).
3. Check minimum distances to ferritic and magnetic materials. Place the drive so
that trouble-free operation is possible.
4. Fasten the drive.
When mounting accessory parts on the piston rod
1. Attach accessories to the male thread of the piston rod (
è
Fig. 1,
aJ
).
2. Tighten nut and accessories.
5.2 Electrical installation
Warning
For the electrical power supply, only use PELV circuits in accordance with
IEC/EN 60204-1. Only use power sources which guarantee reliable electrical
isolation of the operating voltage in accordance with IEC/EN 60204-1.
The electrical connection is covered by the housing (
è
Fig. 1,
1
). For electrical
installation, the housing must be dismounted.
1
Mounting screws
2
Seal (O-ring)
3
Opening for electrical and pneu
matic connection
4
Mounting thread (M32 x 1.5) for
connecting cable (accessories)
Fig. 5
1
2
4
3
The integrated positioner is supplied with operating voltage and the setpoint sig
nal via the 5-pin plug connector.
Pin
Allocation
Connection
1
Power supply 24 V DC
1)
5
1
2
Input analogue setpoint value 4 … 20 mA
2)
3
GND Power supply/Input/Output
4
Output analogue actual value 4 … 20 mA
2)
5
Input initialisation 24 V DC
1)
Permissible operating voltage range
è
Chapter 11
2)
Reference between position and analogue value is dependent on the initialisation
Fig. 6
The pneumatics must be installed prior to tightening a cable connector
(
è
Chapter 5.3).
1. Select appropriate electrical connecting cable.
– At least 5-wire with wire end sleeves, outside diameter 6.5 … 8 mm.
– Conductor cross-section: 0.75 … 1.5 mm²
Note
Recommendation: Use the NHSB connecting cable with protective conduit
è
Connecting cable assembly instructions (Accessories).
2. Loosen the mounting screws (
è
Fig. 5,
1
) and carefully remove the housing.
3. If present, loosen the cable connector of the connecting cable.
4. Disconnect the pre-assembled plug at the electrical connection (2 screws)
5. Insert the electrical connecting cable through the passage in the housing
(
è
Fig. 5,
3
) and wire it to the plug (
è
Fig. 6).
6. Fasten the wired plug to the electrical connection.
– 2 screws, tightening torque 0.5 Nm ±10 %.
7. Mount the housing onto the drive. Make sure that the seal (O-ring) is seated
correctly.
– Tightening torque of the mounting screws: 2.7 Nm ±10 %.
8. Connect the earth terminal (
è
Fig. 1,
8
) to the earth potential with low imped
ance (short cable with large cross-section).
5.3 Pneumatic installation
Check the necessity of an emergency compressed air supply and of check valves.
These will prevent sudden compensating movements of the piston rod and the
moving load from sliding down suddenly if there is a drop in pressure in a vertical
or inclined mounting position.
2
1
4
3
1
Pneumatic port P
2
Pneumatic port R
3
Connecting cable
4
Housing
Fig. 7
