4
Application
The sensor box SRBP is intended to be used for detecting, transmitting and dis-
playing the end positions and, if applicable, the mid-position of quarter-turn actua-
tors in process automation systems. The sensor box detects the actuation position
of the operated process valve (e.g. valve open, closed or in mid-position).
It is suitable for use with quarter-turn actuators which actuate butterfly valves and
ball valves (process valves) with slow movements and low cycles in media-filled
pipelines.
The sensor box is optimally designed for use with Festo's quarter-turn actuator
DFPB. It can be mounted directly on the DFPB with a suitable coupling
(
Fig. 4
1
), without mechanical adapter bridges. It can also be used with other
quarter-turn actuators from Festo or from other manufacturers if these have a
mechanical interface in accordance with VDI/VDE Guideline 3845 and suitable
mechanical adapter bridges are available (
www.festo.com/catalogue).
The maximum sensing range for the sensor box is 270°.
The device is designed for use in the process industries and in industrial applica-
tions.
5
Transport and storage
Ensure the following storage conditions:
– Short storage periods in cool, dry, shaded and corrosion-protected locations.
6
Requirements for product use
Fitting and commissioning is to be carried out only by qualified personnel in ac-
cordance with the operating instructions.
Warning
Pinch point! Body parts can be injured by the rotating shaft.
• Vent the system before mounting or removing.
• Ensure that no one can put their hands near any moving parts.
It must not be possible to touch the shaft until the system is unpressurized.
Note
Improper handling can result in malfunctions.
• Make sure that all the instructions in this chapter are observed. The product
will then function correctly and reliably.
• Compare the maximum values specified in these operating instructions with
your actual application (e.g. currents, voltages, torques, temperatures). The
product can only be used in accordance with the relevant safety guidelines if the
maximum load limits are observed.
• All applicable national and international regulations must be complied with.
• Remove the packaging. The packing is intended for recycling (except for: oiled
paper = general waste).
• Take into consideration the ambient conditions at the location of use. Corrosive
environments reduce the service life of the product.
• Use the product only in process industries and in industrial applications, only as
intended, in its original condition without unauthorized modifications, and in
perfect technical condition. Only the conversions and modifications described in
this documentation are permitted.
• The product is not a safety component and must only be used as designated.
• If commercially-available valves are connected, the specified limits for pres-
sures, temperatures, electrical data, torques, etc. must not be exceeded.
• Please select the appropriate accessories, for example adapter bridges, coup-
lings and electric cable, from our catalogue www.festo.com/catalogue.
7
Installation
Caution
Uncontrolled movements of the drive can cause damage during mounting.
• Before installing the sensor box, make sure that the compressed air and
power supply are switched off and the quarter-turn actuator is unpressurized.
• Lock out the system to prevent it being restarted.
7.1 Mechanical installation
For mounting on quarter-turn actuators, the sensor box has a pattern of mounting
holes in accordance with VDI/VDE Guideline 3845 (
catalogue www.festo.com/
catalogue).
The four mounting screws (
Fig. 1
8
) are already captive-mounted in the base-
plate. To mount the sensor box, you must remove the housing cover (
Fig. 1
1
)
and the 9-pin terminal strip (
Fig. 1
aB
).
• For use with the
DFPB, use a suitable
mechanical coupling
1
. When using
other quarter-turn
actuators, you will
need suitable
adapter bridges
2
(see accessories in
catalogue
www.festo.com/
catalogue).
• Mount and assemble
the sensor box so
that it works in the
manner desired.
Fig. 4
1
2
Before mounting
10.
Put the valve in one of its end positions.
11.
Ensure there is no tension or pressure applied.
Mounting
1. Undo the four socket head screws on the cover (
Fig. 1
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. 5
1
2
1
4. Remove the terminal strip from the housing so that you can access the two
mounting screws under it.
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. 6).
1
DFPB quarter-turn actuator
(top view)
2
Coupling for force
transmission
3
Shaft of the sensor box
4
Sensor box SRBP
(view from below)
Fig. 6
1
2
3
2
4
6. Position the sensor box on the quarter-turn actuator. When using DAPS actuat-
ors and actuators from other manufacturers, use appropriate mechanical ad-
apter bridges and couplings if necessary (
catalogue www.festo.com/cata-
logue).
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 requi-
rements of your valve. To do so, you must remove the indicator ring and disassem-
ble the sections of the position indicator. You can then put the sections back to-
gether according to your requirements.
