Before mounting
1. Put the valve in one of its end positions.
2. Ensure there is no tension or pressure applied.
Mounting
1. Undo the four socket head screws on the cover (
2
).
2. Carefully lift up the cover.
3. Using a suitable tool (e.g. a pin or screwdriver), carefully press down the two red
release levers on the pin strip, one after the other. This releases the terminal
strip.
1
Release levers on the
pin strip
2
Screwdriver
Fig.8
1
2
1
4. Remove the terminal strip from the housing. You can now access the two mount
ing screws underneath.
5. Using a suitable tool or with the aid of the coupling, align the shaft of the sensor
box so that the shaft of the sensor box, the coupling and the shaft of the
quarter−turn actuator all intermesh in the desired way (see example in Fig.9).
1
Quarter−turn actuator
(here DFPB)
2
Coupling for force
transmission
3
Shaft of the sensor box
4
Sensor box SRAP
(view from below)
Fig.9
1
2
3
2
4
6. Position the sensor box on the quarter−turn actuator so that the two shafts en
gage. If necessary, use appropriate mechanical adapter bridges and couplings
(
è
catalogue www.festo.com/catalogue).
7. Tighten the four mounting screws (Fig.1
8
) torque max. 5 Nm.
7.2 Adjusting the visual position indicator
You may need to adapt the visual three−dimensional position indicator to the re
quirements of your valve. To do so, you must remove the indicator ring and disas
semble the sections of the position indicator. You can then put the sections back
together according to your requirements.
Removing the indicator ring
1. Turn the indicator ring until the bottom edge of the indicator ring and the bottom
edge of the plastic cap are flush.
2. Pivot the indicator ring around 90° (see Fig.10).
3. You can now remove the indicator ring from the cover of the sensor box.
Fig.10: Removing the indicator ring
1
2
3
Assembling the sections
Caution
If handled improperly, the clips on the position indicator sections could break
off.
· Take care to clip the sections together without breaking off the fastening
clips.
1. Clip the sections of the visual position indicator together in such a way that the
open paths of the valve are displayed.
Fig.11: Clipping the sections of the indicator ring together
Be sure to make the centre piece (position pointer) and the indicator ring each
from sections of the same colour. One section is included separately.
Fig.12: Construction of the position indicator examples
Mounting the position indicator
1. Insert the indicator ring back into the sensor box cover, by reversing the steps
for removal (
è
2. Push the centre piece (position pointer) of the position indicator back onto the
shaft of the sensor box. Make sure the alignment is correct.
Before you put the cover of the sensor box back in place, you must carry out the
electrical installation (
è
After that you can put the cover of the sensor box back in place torque
max. 5 Nm.
7.3 Electrical installation
Warning
Use only power units which guarantee reliable electrical isolation of the opera
ting voltage as per IEC/DIN EN60204−1. Obser ve also the general requirements
for PELV power circuits as per IEC/DIN EN 60204−1.
Caution
Installation errors can damage the electronics or cause faults.
Use an electrical connecting cable with a nominal outside diameter of 5 to
13mm.
Make sure that the length of the signal cable does not exceed the permissible
length of 30 m.
To transmit analogue signals, use only screened cables with twisted pairs.
Attach the cable screening at one end to the higher−level system.
Connect the earth connection (
aJ
) with low impedance (short cable
with large cross−sectional area) to the earth potential.
Caution
The sensor box contains electrostatically sensitive devices. The internal electro
nic components may be damaged if they are not handled correctly.
· Observe the handling specifications for electrostatically sensitive devices.
· Discharge yourself electrostatically before fitting or removing components in
order to protect the components against discharges of static electricity.
The electrical connection terminals are built into the device. The device must be
opened for electrical installation. To dismantle, see the steps in section 7.1.
1. If not already done, open the cover and release the terminal strip, as described
in section 7.1.
2. Route the electric cable through the cable connector.
3. Use wire end sleeves suitable for the connection and wire the terminal strip
according to the pin allocation cable cross section max.2.5 mm³; torque max.
0.6 Nm.
