Festo SRBC Series User manual

Translation of the original instructions
1 Further applicable documents
User documentation
Name, type Table of contents
Sensorbox, SRBC-CA3-N-20N-ZC-EX6 Operating conditions EX
Tab. 1
All available documents for the product èwww.festo.com/pk.
2 Safety
2.1 Safety instructions
The cable connector supplied is only for cable throughfeed.
– To ensure the specified degree of protection IP67, seal each cable entry tight
(cable connector, blanking plug).
2.2 Intended use
The sensorbox is intended for recording, electrical feedback and optical display of
the end positions of drives. Appropriate for operation are semi-rotary drives and
other products with a mechanical interface in accordance with VDI/VDE Directive
3845.
3 Service
If you have technical questions, contact the regional Festo contact
èwww.festo.com.
4 Product overview
Feature Value Description
Type SRBC Sensorbox for process automation
Design C Sensorbox
Mechanical interface A3 Mounting adapter, hole pattern 30x80mm, height
20mm
Display type YR Position indicator yellow/red
Measuring range 90 0…90°
N Proximity sensors, inductive
R Reed with contact
Measuring principle
MW Potential-free contact, changer
2A 110 V AC
22A 250 V AC
20N 8.2VDC (NAMUR)
Nominal operating voltage
1 24 V DC
N NPN
P PNP
ZC 2-wire N/C contact (NC)
ZU 2-wire N/O contact (NO)
Switching element function
1W 1-pin toggle switch
Electrical connection C2 Screw terminal
Cable joint P20 M20x1.5, polymer
EU certification EX6 II 1GD
Tab. 2
1Position indicator
2Housing cover
3Housing screws
4Proximity sensor
5Terminal strip
6Shaft
7Cable entry with cable connector or blanking plug
8Mounting adapter with retaining screws
9Earth connection (PE) on the inside of the housing wall
10 Shaft with cam and spring
Fig. 1
Presetting on delivery:
– Position indicator “closed”
– Switching point for “open” 90° anti-clockwise
5 Function
The shaft transmits the rotation of the drive to the visual position indicator.
Depending on the design, the cams actuate mechanical, inductive or magnetic
proximity sensors to provide the signals at the electrical output, terminal diagram
è Tab. 3 Terminal diagram of sensorbox SRBC.
6 Assembly and installation
For sensorboxes with type SRBC-...-2A and SRBC-...-22A:
WARNING!
Electric voltage
Injury due to electric shock.
• Switch off the power supply before opening the device.
6.1 Assembly
During assembly, observe the position indicator and ensure compliance with the
process fitting.
1. Place the sensorbox with mounting adapter in position and align it.
– Avoid axial load of the drive shaft.
2. Attach the mounting adapter.
– Retaining screws 8, tightening torque 6Nm ±10%
Mounting adapter
When replacing the sensorbox, observe tightening torque. Tightening torque
between mounting adapter and sensorbox: 10Nm ±10%
8121896
SRBC-...
Sensorbox
8121896
2019-10d
[8121898]
Instructions | Operating
Festo SE & Co. KG
Ruiter Straße 82
73734 Esslingen
Germany
[phone]
www.festo.com

6.2 Electrical connection
NOTICE!
The IP67 degree of protection depends on the type of electrical connection. Inap-
propriate cables or incorrect installation reduce the degree of protection of the
sensorbox.
SRBC-...-1W SRBC-...-ZC/-ZU-....
SRBC-...-EX6
SRBC-...-N/-P
Tab. 3 Terminal diagram of sensorbox SRBC
1. Loosen the screws 3on the housing cover 2 and remove the housing cov-
er.
2. Screw the cable connector into the cable entry. Guide the electrical connect-
ing cable through the cable connector to the terminal block.
– Tightening torque of cable connector: 4.5Nm
– Outside diameter of electric connecting cable: 5…13mm
– Conductor cross-section: 0.25…2.5mm²
3. Seal unused openings with blanking plugs.
4. Wire connections è Tab. 3 Terminal diagram of sensorbox SRBC.
5. Connect the earth terminal with low impedance to the earth potential.
– Earth terminal tightening torque: 1.3Nm
6. Tighten the union nut on the cable connector.
– Tightening torque of union nut: 4Nm
7. Place the housing cover in position and tighten the housing screws.
– Observe the correct position of the seals.
– Tightening torque of housing screws: 2Nm
6.3 Set switching points
The switching points are preset è 4 Product overview.
Fig. 2 Switchpoint of sensorbox SRBC
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 sensor
switches.
4. Release the red cam.
Ä– The spring presses the red cam into the ring gear.
– The switching point for “closed” is set.
5. Open process valve.
ÄPosition indicator “open”.
6. Press down the green cam against the spring and turn until the upper proxim-
ity sensor switches.
7. Release the green cam.
Ä– The spring presses the green cam into the ring gear.
– The switching point for “open” is set.
8. Place the housing cover in position and tighten the housing screws.
– Observe the correct position of the seals.
– Tightening torque of housing screws: 2Nm
7 Service and care
If used as intended, the product is maintenance-free.
8 Fault clearance
Fault description Cause Remedy
Wire break Replace cable
Position of the switching points
incorrectly defined
Set switching points
è 6.3 Set switching points
Incorrect or unexpected signal
Proximity sensor defective Replace sensorbox
Tab. 4
9 Technical data
SRBC-...
Setting range of sensors [°] 0…360
Sensing range of position indicator [°] 0…90
Cable connector M20x1.5
Approved cable diameter [mm] 5…13
Electrical connection 10-pin, screw terminal
Nominal conductor cross section that
can be connected
[mm²] 0.25…2.5
Mounting position Any
Operating voltage range AC
SRBC-...-2A [V] 0…120
SRBC-...-22A [V] 0…250
Max. output current AC
SRBC-...-2A [mA] 250 (at 120V)
SRBC-...-22A [mA] 3000 (at 250V)
Operating voltage range
SRBC-...-2A-1W [V] 0…175
SRBC-...-22A-1W [V] 0…30
SRBC-...-20N-ZC [V] 8.2
SRBC-...-20N-ZC-EX6 [V] 8.2
SRBC-...-1-P / SRBC-...-1-N [V] 10…30
SRBC-...-1-ZU [V] 5…60
Max. output current DC
SRBC-...-2A-1W [mA] 250 (at 175V)
SRBC-...-22A-1W [mA] 3000 (at 30V)
SRBC-...-20N-ZC [mA] 3
SRBC-...-20N-ZC-EX6 [mA] 3
SRBC-...-1-P / SRBC-...-1-N /
SRBC-...-1-ZU
[mA] 100
Voltage drop
SRBC-...-1-P / SRBC-...-1-N [V] £3
SRBC-...-1-ZU [V] £5
Residual current
SRBC-...-P / SRBC-...-N [mA] £15
Idle current
SRBC-...-P / SRBC-...-N [mA] 0…0.5
SRBC-...-1-ZU [mA] 0…1
Reverse polarity protection
SRBC-...-P / SRBC-...-P / SRBC-...-ZU For all electrical connections
Short circuit protection
SRBC-...-P / SRBC-...-N Pulsed
Ambient temperature
SRBC-...-1-P / SRBC-...-1-N [°C] -20…70
SRBC-...-2A-1W / SRBC-...-22A-1W /
SRBC-...-20N-ZC / SRBC-...-20N-ZC-EX6
/ SRBC-...-1-ZU
[°C] -20…80
Degree of protection IP67, NEMA 4/4X
Continuous shock resistance to DIN/IEC 60068 Part
2-27
±15 g with 6 ms duration;
1000 shocks per direction
Vibration resistance to DIN/IEC 60068 Part 2-6 0.35 mm path at 0…60 Hz;
5 g acceleration at 0…150 Hz
Materials
Housing Painted die-cast aluminium
Shaft, screws, mounting adapter High-alloy stainless steel
Seal NBR
Optical position indicator PC
Cable connector/blanking plug PA
Tab. 5