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Controller, Electric actuator, Flange valve, Electric valve, Pressure controller
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ENG-93001-93621-08.04-1M Printed in Switzerland ZSD Subject to technical modifications
BC
28
Wiring diagrams of NVF..
The actuator spindle moves to the end stop if the power supply is interrupted. In the case of the NVF24-MFT(2)-T type, the actuator spindle retracts
into the actuator housing (pulling). In the case of the NVF24-MFT(2)-T type, the actuator spindle extends from the actuator housing (pushing). The
valve has either an NO (open when deenergized) or NC (closed when deenergized) function depending on its design (closing point up or down).
Wiring diagram of NVF24-MFT, NVF24-MFT-E
T ~ AC 24 V - + DC 24 V
~ Y2 T-
+
1 2 3 4 5
YZ
NVF24-MFT
s Y (DC 0...10 V)
U5 (DC 2...10 V)
NVF24-MFT-E
!
U
Symbols
"Direct" signal
"Inverted" signal
Closing point "up"
Closing point "down"
Relay contact s
Meas. signal min. (e.g. U = 2 V)
Meas. signal max. (e.g. U = 10 V)
Actuator spindle moves
"Override" stroke direction
Valve closing point
S3.1 S3.2 NVF24-MFT(2)-T NVF24-MFT(2)-E-T
1) 1) 1) 0 k k RETRACTING
1) 1) 1) 0 k k EXTENDING
Connection via
safety isolating
transformer
Emergency control function (optional with feedback U5)
from controller
1) The position of the slide switch has no influence on the emergency control direction
k) No measuring voltages can be determined in the deenergized state
Influence of the actuator spindle on different valves (closing point selection)
Valve
Valve closing point
Closing point setting of
linear actuator
Actuator spindle retracts Actuator spindle extends
Up
Valve control path
closing
(0% flow)
Valve control path
opening
(100% flow)
Down
Valve control path
opening
(100% flow)
Valve control path
closing
(0% flow)
Up
Valve control path
closing
(0% flow),
bypass 100% open
Valve control path
opening
(100% flow),
bypass 0% closed
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