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Control Unit CU4 Direct Connect UK-3 / 20.04.2011
Control Unit
CU4 Direct Connect
Instruction Manual: UK-3
UK
APV
7.
Feedback unit
7.1.
General terms
For the internal registration of the valve position indication,
the feedback unit
with 2 Hall effect sensors is applie
d. It is used
when single seat and butterfly valves are installed.
The control of these sensors is effected by magnets assembled
on the valve shaft rod. The Hall effect sensors are installed on a
movable threaded rod. By means of this assembly, the sensors
can be adjusted via a large range, in accordance with the valve
stroke.
7.2.
Sensors
Hall effect sensors, APV type H 320385
UB 4,75-5,25 VDC
operating distance according to APV specification
7.3.
Adjustment of valve position feedback
By turning of the adjustment screws on which the Hall effect
sensors are installed, the sensors can be moved into the
respectively required position to detect the valve position.
The o-rings on the adjusting srews prevent unintended
ccidental displacement of these positions. After the installation
of the control unit, check the correct adjustment of the position
of the Hall sensor.
7.4.
Use of external sensors
Instead of the internal Hall effect sensors, also 2 external proximity
switches can be connected to the CU4 DC, e.g. for the
valve position indication at double seat valves.
Proximity switch APV Type H208844
UB 4,75-5,25 VDC
Operating distance according to APV specification
Hall effect sensor
adjustment screws
