ARI Armaturen ARI-PREMIO - Manual (Page 43)

0040501000 4511 Page 43
Operating and installation instructions
Thrust actuator ARI-PREMIO
5.5.13.2 Optional board support for pole changing
There are several ways of telling a DC
actuator which direction it should travel in.
The most widespread method is three-step
control – our standard technology.
As with the AC variants, the driving spindle
is extended or retracted by means of the
energised terminal.
If 24V DC voltage is present at terminals 1
and 11, for example, the spindle is moved in;
if there is voltage at terminals 1 and 14, it is
moved out.
In older plants or with older actuators as well
as with our DC module, the direction of
motor rotation is normally changed with the
help of a pole changing device. Here, power
is applied to terminals 11 and 14. The
actuator extends or retracts the driving
spindle according to the polarity of the
supply voltage.
Fig. 23: Pole changing and 3-step control
compared
This method of control can be implemented
with the optional board support for pole
changing (Fig. 24). An electronic system
that converts the signals for this purpose is
mounted on the board in addition to the
travel switches. Thanks to the optional
board support for pole changing, the
actuator can now be operated both with a
three-step signal and with pole changing.
Fig. 24
NOTE !
- The optional board support for pole changing should always be used you
are not sure whether three-step or pole changing control is required! The
support is suitable for both types of control.
DC 3-step DC pole changing
Open
Spindle retracted
Close
Spindle extended
DC 3-step DC pole changing
or
or