Belimo SRF24A-SR Instruction Manual

Technical data sheet SRF24A-SR
Modulating rotary actuator with
emergency control function for ball
valves
• Nominaltorque20Nm
• NominalvoltageAC/DC24V
• ControlModulatingDC(0)2...10V
• PositionfeedbackDC2...10V
• Deenergisedclosed(NC)
Technical data
Electrical data Nominal voltage AC/DC 24 V
Nominal voltage frequency 50/60 Hz
Nominal voltage range AC 19.2...28.8 V / DC 21.6...28.8 V
Power consumption in operation 5.5 W
Power consumption in rest position 3 W
Power consumption for wire sizing 8.5 VA
Connection supply / control Cable 1 m, 4 x 0.75 mm²
Parallel operation Yes (note the performance data)
Functional data Torque motor Min. 20 Nm
Torque spring return Min. 20 Nm
Positioning signal Y DC 0...10 V
Positioning signal Y note Input impedance 100 kΩ
Operating range Y DC 2...10 V
Position feedback U DC 2...10 V
Position feedback U note Max. 0.5 mA
Position accuracy ±5%
Direction of rotation motor Y=0 (0V = A-AB = 0%)
Direction of rotation spring-return Deenergised NC, valve closed (A - AB = 0%)
Manual override By means of hand crank and locking switch
Angle of rotation 90°
Running time motor 90 s / 90°
Running time emergency setting position <20 s / 90°
Sound power level motor max. 45 dB(A)
Position indication Mechanical
Service life Min. 60,000 emergency positions
Safety Protection class IEC/EN III Safety extra-low voltage
Protection class UL UL Class 2 Supply
Degree of protection IEC/EN IP54
Degree of protection NEMA/UL NEMA 2, UL Enclosure Type 2
EMC CE according to 2004/108/EC
Certification IEC/EN IEC/EN 60730-1 and IEC/EN 60730-2-14
Certification UL cULus according to UL 60730-1A, UL 60730-2-
14 and CAN/CSA E60730-1:02
Mode of operation Type 1.AA
Rated impulse voltage supply / control 0.8 kV
Control pollution degree 3
Ambient temperature -30...50°C
Non-operating temperature -40...80°C
Ambient humidity 95% r.h., non-condensing
Maintenance Maintenance-free
Weight Weight approx. 2.2 kg
Safety notes
!
• This device has been designed for use in stationary heating, ventilation and air
conditioning systems and is not allowed to be used outside the specified field of
application, especially in aircraft or in any other airborne means of transport.
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• Only authorised specialists may carry out installation. All applicable legal or
institutional installation regulations must be complied during installation.
• The device may only be opened at the manufacturer‘s site. It does not contain any
parts that can be replaced or repaired by the user.
• The cables must not be removed from the device.
• The device contains electrical and electronic components and is not allowed to be
disposed of as household refuse. All locally valid regulations and requirements must
be observed.
Productfeatures
Mode of operation The actuator is connected with a standard modulating signal DC 0...10 V. The actuator
moves the valve to the operating position at the same time as tensioning the return
spring. The valve is turned back to the emergency position by spring force when the
supply voltage is interrupted.
Directmounting Simple direct mounting on the ball valve with only one screw. The mounting orientation
in relation to the ball valve can be selected in 90° steps.
Manual override Manual actuation of the valve with manual elevator crank, engagement with the locking
switch at any position. Unlocking is manual or automatic by applying the operating
voltage.
High functional reliability The actuator is overload protected, requires no limit switches and automatically stops
when the end stop is reached.
Adjustable angle of rotation Adjustable angle of rotation with mechanical end stop.
Electrical installation
!
Notes • Connection via safety isolating transformer.
• Parallel connection of other actuators possible. Observe the performance data.
Wiring diagrams
AC/DC 24 V, modulating
A – AB = 0%
Y=0
Y
U
1 32 5
–
+
T
~
DC (0)2…10 V
DC 2…10 V
Cablecolours:
1 = black
2 = red
3 = white
5 = orange
SRF24A-SR Rotaryspring-returnactuator,Modulating,AC/DC24V,
20Nm
Safety notes
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SRF24A-SR • en-gb • 2014-10-15 • subject to changes
2

Dimensionaldrawings
40
162
172
182
244
103
101
27
59
Further documentation
•Overview Valve-actuator combinations
• Data sheets for ball valves
• Installation instructions for actuators and/or ball valves
• General notes for project planning
SRF24A-SR Rotaryspring-returnactuator,Modulating,AC/DC24V,
20Nm
Dimensions[mm]
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