Automatic control systems for:
air conditioning/heating/industrial process.
CONTROLLI
Rev. b
11/09
5
DIM152
Function in the
Description
“OFF” pos.
“ON” position
1 2-10 Vdc
0-5 Vdc
Feedback signal
2 Modulating
Increase/decrease
Control (not at Sequence)
3 –
Sequence
Sequence control
4 0-10 V
2-10 V
Voltage range
5 1-5 V, 4-7 V
6-9 V, 8-11 V
Part of voltage range
6 60 s
300 s
Running time
7 Normal
Inverted
Direction of movement
8 Normal
Linear/Logarithmic
Valve characteristic
9 Operation
End position adjust
Operation/End position adjustment
There are nine switches in a row on the
circuit board. On delivery (’Factory’), all
switches are in the “OFF” position.
1 Feedback signal — 2-10 / 0-5 Vdc
MVHFA actuators are equipped with a 2 -
10 and 0-5Vdc position feedback signal
selectable by Switch No 1.
2 Control signal—MOD / INC
Actuator can either be controlled by a vari-
able direct voltage, a so called modulating
signal (MOD), or by an increase/decrease
signal (INC).
3 Sequence or parallel control—
– – – / SEQ
With sequence (or parallel) control (SEQ),
two actuators/valves can be controlled by
only one control signal.
For each of these you can choose which
part of the voltage range to use, the upper
one, 6-9 V (8-11 V) or the lower one,
1-5 V (4-7 V).
If the switch NORM / INV is in NORM
position, the higher voltage corresponds to
100% flow and the lower one to 0%.
With NORM / INV in the INV position you will
get the opposite function.
4 Voltage range—0-10 / 2-10
You can choose whether to use the control
signal voltage range 0-10 V or 2-10 V.
5 Part of voltage range—
0-5, 2-6 / 5-10. 6-10
You can choose which part of a voltage
range to use, the lower one 1-5 V
(4-7 V) or the upper one 6-9 V (8-11 V).
If the switch is in the NORM position, the
higher voltage corresponds to 100% flow
and the lower one to 0%. To achieve the
opposite function, the switch should be put
in its INV position.
6 Running time—60 s / 300 s
With increase/decrease control, you can
choose a running time between 60 s or
300 s.
With modulating control, the running time
is always 15 s / 20 s / 30 s.
7 Direction of movement—
NORM / INV
When NORM is selected, the spindle of the
actuator moves inwards when the control
voltage decreases or if the actuator gets a
decrease signal.
With the switch NORM / INV, the direction
of movement can be changed.
8 Linearization—NORM / LIN/LG
The motorized valve characteristics can
be modified. If you wish for the characteris-
tics to be affected, the setting LIN/LG will
make the characteristics of an equally
modified percentage (EQM) valve almost
linear.
On the other hand, with LIN/LG a motorized
valve equipped with a linear valve will oper-
ate with ”Quick open characteristics”. This
means that with a small control signal, the
valve will be almost completely open.
9 End position adjustment—OP / ADJ
This switch is only used to adjust the end
positions when the actuator is commis-
sioned.
With powered actuator, momentarily put
the switch in the ON position. The actuator
will automatically find the end positions of
the valve.
At the end of the adjustment all the other dip
switch settings (1 to 8) will be read again.
Note!
For the actuator to register new
settings of the switches, the supply
voltage must be cut, the settings done
and then the power on
or
the end position adjustment must be
done again (see point 9).
Refer also to illustration on page 2.
(This does not apply to the switch
OP/ADJ).
