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  9. Festo SRBE Series User manual

Festo SRBE Series User manual

SRBE-...-EX
Limit switch box
Festo SE & Co. KG
Ruiter Straße 82
73734 Esslingen
Germany
+49 711 347-0
www.festo.com
Operating instruction
8169567
2022-11d
[8169569]
8169567
Translation of the original instructions
© 2022 all rights reserved to Festo SE & Co. KG
1Identification EX
Identification Certificates
TM
Ex db IIC T6 Gb
Ex tb IIIC T(*) Db
IECEx FTZU 15.0014X
II 2G
II 2D
Ex db IIC T6 Gb
Ex tb IIIC T(*)°C Db
FTZU 15 ATEX 0095X
Ex db IIC T6 Gb
Ex tb IIIC T(*) Db
DNV 16.0067X
Ex db IIC T6 Gb
Ex tb IIIC T(*) Db
GYJ16.1497X
Tab. 1: Identification EX
2 Applicable documents
NOTICE
Technical data for the product can have different values in other documents. For
operation in an explosive atmosphere, the technical data in this document always
have priority.
All available documents for the product èwww.festo.com/sp.
3 Safety
3.1 Safety instructions
–The device can be used under the stated operating conditions in zone 1, explo-
sive gas atmospheres, and in zone 21, explosive dust atmospheres.
–Standards applicable to Inmetro: ABNT NBR IEC 60079-0, ABNT NBR IEC
60079-1, ABNT NBR IEC 60079-31.
3.2 Intended use
The intended use of the product is to record and display the end positions and
intermediate positions of pneumatic drives.
3.3 Training of qualified personnel
Work on the product may only be carried out by qualified personnel who can
evaluate the work and detect dangers. The qualified personnel have skills and
experience in dealing with electrical (open-loop) control technology.
3.4 Identification X: special conditions
–Ambient temperature -20 °C £ Ta £ +60 °C
–Prepare the Ex cable fittings and blanking plugs in the Ex degree of protection
according to the identification in this certificate with at least IP66/IP67.
–Contact the manufacturer for information on the dimensions of the pressure-
resistant connections.
–Install the product in such a way that there is no danger of spreading brush
discharges when used in explosive dust atmospheres.
–The minimum property class of the captive screws used is A2-70 or A4-70.
4Additional information
–Contact the regional Festo contact if you have technical problems
èwww.festo.com.
–Accessories and spare parts èwww.festo.com/catalogue.
5 Product overview
1
2
3
4
5
6
7
8
9
Fig.1
1
Position indicator
2
Housing cover
3
Housing screws
4
Shaft with cam
5
Proximity switch
6
Terminal strip
7
Protective earthing (PE) on the
inside and outside of the housing
wall
8
Cable entry M20x1.5 or 1/2 NPT
9
Mounting adapter with M5x8
retaining screws
Default settings on delivery:
–Position indicator “closed”
–Switching point for “open” 90° anti-clockwise
6Function
The limit switch box is used for the detection and electrical and optical feedback
of the end positions of a drive. The limit switch box is suitable for operation
with semi-rotary drives with a mechanical interface in accordance with VDI/VDE
Guideline3845.
7 Installation
WARNING
Carry out the commissioning, service and inspection outside of the explosive
atmosphere. Disconnect the power supply before this work and secure against
reconnection.
1. Close the process valve.
2. Place the limit switch box with the mounting adapter on the drive and align it.
–Avoid axial load of the drive shaft.
3. Fasten the mounting adapter to the drive.
–Lock the retaining screws. Tightening torque: 6 Nm ± 10%
Mounting adapter
Observe the tightening torque when replacing the limit switch attachment.
–Tightening torque between mounting adapter and limit switch box: 10 Nm
± 10%
8Electrical connection
WARNING
Before switching on the electrical circuit in potentially explosive atmospheres:
• Mount the cover securely on the housing.
• Connect with potential equalisation.
WARNING
Use cable connectors of type of (ignition) protection Ex-d and a degree of protec-
tion of at least IP67. Seal unused cable entries with blanking plugs.
NOTICE
Thread of the cable guide depends on the product variant: M20x1.5 or 1/2 NPT
Cable fittings must be appropriate for the corresponding thread type. Cable con-
nector threads must not protrude into the interior of the housing.
NOTICE
The supplied plastic blanking plugs are intended exclusively for protection against
contamination during transport and handling. During operation, these should be
replaced by cable connectors and/or blanking plugs approved for use in explosion
protection areas.
1. Loosen the housing screws [3] on the housing cover [2].
2. Screw the cable fitting into the cable entry [8]. Insert the electrical connecting
cable through the cable fitting to the terminal strip [6].
3. Wire the connections. Maximum tightening torque of the screws: 0.4 Nm è9
Wiring diagram
4. Connect the earth terminal[7] with low impedance (short cable with large
cross section) to the earth terminal.
5. Place the housing cover in position and tighten the housing screws.
–Make sure that the seal is positioned correctly.
9 Wiring diagram
SRBE-Cxx-YR90-MW-22A-1W-…/SRBE-Cxx-YR90-R-2A-1W-…
Fig. 2: Two SPDT micro-switches, mechanical or magnetic
SRBE-Cxx-YR90-N-20N-ZC-…/SRBE-Cxx-YR90-N-1-ZU-…
Fig. 3: Two-wire proximity switches, inductive
SRBE-Cxx-YR90-N-1-P-…/SRBE-Cxx-YR90-N-1-N-…
Fig. 4: Three-wire proximity switches, inductive
SRBE-Cxx-YR90-MW-22A-2W-…
Fig. 5: Four SPDT micro-switches, mechanical
10 Setting the switching point
The switching points are preset è5 Product overview
Fig. 6: Setting the switching point
1. Close the process valve.
ÄPosition indicator: ‘closed’.
2. Loosen the housing screws on the housing cover and remove the housing
cover.
3. Lift the red cam against the spring and turn until the lower proximity switch
switches.
4. Release the red cam.
ÄThe spring presses the red cam into the ring gear.
ÄThe switching point for ‘closed’ is set.
5. Open the process valve.
ÄPosition indicator: ‘open’.
6. Press down the green cam against the spring and turn until the upper prox-
imity switch switches.
7. Release the green cam.
ÄThe spring presses the green cam into the ring gear.
ÄThe switching point for ‘open’ is set.
8. Place the housing cover in position and tighten the housing screws.
11 Maintenance and care
–The device is maintenance-free.
–Repairs are not possible.
–Avoid contact with aggressive substances.
–Protect surfaces from excessive heat.
12 Fault clearance
Fault description Cause Remedy
Incorrect or unexpected signal Wire break Replace cable
Position of the switching points incorrect Set switching points
Proximity switch defective Replace limit switch box
Tab. 2
13 Technical data
SRBE-...
Angular detection setting range [°] 0…90
Electrical connection
Nominal cross section of conductor that
can be connected
[mm²] 0.25…2.5
Cable entry SRBE-…-M20 2 x M20x1.5
Cable entry SRBE-…-N12 2 x 1/2 NPT
Mounting position Any
Operating voltage range AC
SRBE-Cxx-YR90-R-2A-1W-… [V] 0…240
SRBE-Cxx-YR90-MW-22A-1W-…
SRBE-Cxx-YR90-MW-22A-2W-…
[V] 0…250
Max. output current AC
SRBE-Cxx-YR90-R-2A-1W-… [A] 0.416 at 240 V
SRBE-Cxx-YR90-MW-22A-1W-…
SRBE-Cxx-YR90-MW-22A-2W-…
[A] 3
Operating voltage range DC
SRBE-Cxx-YR90-R-2A-1W-… [V] 0…30
SRBE-Cxx-YR90-MW-22A-1W-…
SRBE-Cxx-YR90-MW-22A-2W-…
[V] 0…30
SRBE-Cxx-YR90-N-20N-ZC-… [V] 8.2
SRBE-Cxx-YR90-N-1-P-…
SRBE-Cxx-YR90-N-1-N-…
[V] 10…30
SRBE-Cxx-YR90-N-1-ZU-… [V] 5…60
Max. output current DC
SRBE-Cxx-YR90-R-2A-1W-… [A] 3 at 30 V
SRBE-Cxx-YR90-MW-22A-1W-…
SRBE-Cxx-YR90-MW-22A-2W-…
[A] 6
SRBE-Cxx-YR90-N-20N-ZC-… [mA] 3
SRBE-Cxx-YR90-N-1-P-…
SRBE-Cxx-YR90-N-1-N-…
[mA] 100
SRBE-Cxx-YR90-N-1-ZU-… [mA] 4…100
Voltage drop
SRBE-Cxx-YR90-N-1-P-…
SRBE-Cxx-YR90-N-1-N-…
[V] £3
SRBE-Cxx-YR90-N-1-ZU-… [V] £5
No-load current
SRBE-Cxx-YR90-N-1-P-…
SRBE-Cxx-YR90-N-1-N-…
[mA] £15
Residual current
SRBE-Cxx-YR90-N-1-P-…
SRBE-Cxx-YR90-N-1-N-…
[mA] 0…0.5; typically 0.1 mA at 25 °C
SRBE-Cxx-YR90-N-1-ZU-… [mA] 0…1; typically 0.7 mA
Reverse polarity protection
SRBE-Cxx-YR90-N-1-P-…
SRBE-Cxx-YR90-N-1-N-…
SRBE-Cxx-YR90-N-1-ZU-…
For all electrical connections
Short circuit current rating
SRBE-Cxx-YR90-N-1-P-…
SRBE-Cxx-YR90-N-1-N-…
Clocked
Ambient temperature EX [°C] –20…+60
Max. surface temperature T(*) limit switch box
SRBE-Cxx-YR90-MW-22A-1W-…
SRBE-Cxx-YR90-MW-22A-2W-…
SRBE-Cxx-YR90-N-1-ZU-…
[°C] 75
SRBE-Cxx-YR90-N-1-P-…
SRBE-Cxx-YR90-N-1-N-…
SRBE-Cxx-YR90-N-20N-ZC-…
SRBE-Cxx-YR90-R-2A-1W-...
[°C] 61
Degree of protection IP67, NEMA 4/4X
Continuous shock resist. to DIN/IEC 68 Part 2-82 ± 15 g at 6 ms duration; 1000 shocks p. direction
Vibration resistance to DIN/IEC68,Part2-6 0.35 mm path at 0…60 Hz;
5 g acceleration at 0…150 Hz
Housing material Painted die-cast metal
Material: shaft, screw, mounting adapter High-alloy stainless steel
Material: seal NBR
Material: visual position indicator PC
Tab. 3: Operating conditions

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