8
Commissioning
During commissioning, the positions of the drive or process valve are determined,
in which the limit switch attachment is to deliver the desired signals (end
position1, end position 2). The rotatable cams (
è
Fig.6
4
,
6
) are hereby
released from the respective toothed disc by pressing or pulling against the spring
force and turned into the desired position. The closed position of the process valve
is switched through the upper red cam (
è
Fig.6
6
) and the open position
through the lower yellow cam (
è
Fig.6
4
) (
è
section 8.1).
1
Shaft
2
Micro
switches (2)
3
Toothed disc
4
Cam (yellow)
5
Spring
6
Cam (red)
1
2
3
4
5
6
Fig.6
8.1 Setting switching points
Danger
High electrical voltage!
· Before working on the device, switch off all voltage (see section 7.2).
1. Close the process valve.
2. Switch off all power.
3. Loosen the red cam from the ring gear by carefully pressing the cam down.
4. Now set the switching point of the upper micro switch by turning the red cam
(acoustically or with a continuity tester).
5. After selecting the switching point, make sure that the red cam is pressed back
into the ring gear through spring force.
6. Open the process valve.
7. Now loosen the yellow cam from the ring gear by carefully lifting the yellow cam.
8. Set the switching point of the lower micro switch by turning the yellow cam
(acoustically or with a continuity tester).
9. Now check the signal behaviour of the limit switch attachment in a test run. To
correct switching points, repeat points 1. to 8.
To conclude commissioning
· Mount the cover of the limit switch attachment tightening torque 2 Nm ± 10 %.
9
Operation
· Compare the maximum values specified in these operating instructions with
your actual application (e.g. pressures, forces, torques, masses, speeds,
temperatures). The product can only be used in accordance with the relevant
safety guidelines if the maximum load limits are observed.
10
Service and maintenance
If used as intended in the operating instructions, the device will be free of
maintenance.
11
Removal and repairs
Danger
· Before working on the electrical components, switch off all power
(see section 7.2).
Make sure that the following sources of energy are switched off:
electrical power supply
compressed air supply.
Information about spare parts and auxiliary means
è
www.festo.com/spareparts.
12
Eliminating malfunctions
Malfunction
Possible cause
Remedy
Incorrect or unexpected signal
Wire break
Replace cable
p
g
Position of the switching
points established incorrectly
Correct position of the
switching points
Micro switch defective
Replace SRBF
Fig.7
13
Technical data
SRBF−C..
CA3−...
CA4−...
CA5−...
CA6−...
Angle acquisition setting range
[°]
0 ... 90
Based on standard
ISO 5211, EN 60947−5−1
Type of fastening
on flange as per ISO 5211 with accessories
Design
square
Mounting position
any
Mechanical interface
see Fig.2
Measuring principle
for proximity switches, mechanical/electrical
Switching element function
changeover switch
Operating voltage range
1)
DC voltage
[V DC]
0 ... 24
Alternating current AC
[V AC]
0 ... 250
Max. switching capacity
DC voltage
[W]
36
Alternating current AC
[VA]
1770
Maximum allowed current dependent on ambient temperature
2)
Ambient temperature 60 °C
[A]
5
Ambient temperature 70 °C
[A]
4
Ambient temperature 75 °C
[A]
3
Ambient temperature 80 °C
[A]
1,5
Insulation voltage
[V]
250
Surge voltage capacity
[kV]
4
Connectable nominal conductor
cross section
[mm³]
0,5 ... 1,5
Protection class
IP67
Ambient temperature
[°C]
−25 ... 80
Degree of contamination
3
Product weight
[g]
655
680
710
725
Materials information
Housing
die−cast aluminium, painted
Materials information for accompanying
high−alloy stainless steel
p
y g
accessories
high−alloy steel
CE symbol (declaration of conformity)
as per EC Low Voltage Directive
1)
The product must be used in only one and the same circuit type throughout its entire service life.
2)
If the current is higher, the mechanical service life is reduced continuously.
Fig.8
