• 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
3
2
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
www.belimo.eu
SRF24A-SR • en-gb • 2014-10-15 • subject to changes
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