Belimo SRF24A-SR Technical Data Sheet

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
Functional data
Safety notes
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Technical data sheet
Electrical data Nominal voltage
Nominal voltage frequency
Nominal voltage range
Power consumption in operation
Power consumption in rest position
Power consumption for wire sizing
Connection supply / control
Parallel operation
Torque motor
Torque spring return
Positioning signal Y
Positioning signal Y note
Operating range Y
Position feedback U
Position feedback U note
Position accuracy
Direction of rotation motor
Direction of rotation spring-return
Manual override
Angle of rotation
Running time motor
Running time emergency setting position <20 s / 90°
Sound power level motor max.
Position indication
Service life
Safety Protection class IEC/EN
Protection class UL
Degree of protection IEC/EN
Degree of protection NEMA/UL
EMC
Certification IEC/EN
Certification UL
Mode of operation
Rated impulse voltage supply / control
Control pollution degree
Ambient temperature
Non-operating temperature
Ambient humidity
Maintenance
Weight Weight approx.
• 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.
SRF24A-SR • en-gb • 2014-10-15 • subject to changes
AC/DC 24 V
50/60 Hz
AC 19.2...28.8 V / DC 21.6...28.8 V
5.5 W
3 W
8.5 VA
Cable 1 m, 4 x 0.75 mm²
Yes (note the performance data)
Min. 20 Nm
Min. 20 Nm
DC 0...10 V
Input impedance 100 kΩ
DC 2...10 V
DC 2...10 V
Max. 0.5 mA
±5%
Y=0 (0V = A-AB = 0%)
Deenergised NC, valve closed (A - AB = 0%)
By means of hand crank and locking switch
90°
90 s / 90°
45 dB(A)
Mechanical
Min. 60,000 emergency positions
III Safety extra-low voltage
UL Class 2 Supply
IP54
NEMA 2, UL Enclosure Type 2
CE according to 2004/108/EC
IEC/EN 60730-1 and IEC/EN 60730-2-14
cULus according to UL 60730-1A, UL 60730-2-
14 and CAN/CSA E60730-1:02
Type 1.AA
0.8 kV
3
-30...50°C
-40...80°C
95% r.h., non-condensing
Maintenance-free
2.2 kg
SRF24A-SR
1