ARI Armaturen Elektrischer Schubantrieb FR 1.2 DE - Handbuch (Seite 9)

P100001973 - 9 -
Connection as a 3-point valve drive (24 V)
Connection to a control voltage (0...10 V and/or 4...20 mA)
Operation with 230V module
ATTENTION:
It is NOT allowed to connect terminals 21, 2a and 2b of the baseboard when the 230V
module is used!
An electrical connection between terminal 1 of the baseboard and terminal N of the
230V module is NOT allowed!
Applying voltage to terminal 2b (or 2a) and 21 makes it possible to move the valve to any desired
position. If voltage is applied to terminals 1 and 2b, the valve shaft moves in and opens the valve. It
moves out and closes the valve when the electrical circuit is closed over terminals 1 and 2a.
In the end positions (at the valve stop, or when the maximum stroke is reached) or in case of an
overload, the electronic motor switch-off responds (no limit switches). The direction of the stroke
can be changed by transposing the connections.
The coding switch is used to set the run times. In this case, the characteristic curve cannot be
selected (resulting in the characteristic curve for the valve). The feedback signal is active as long as
the initialisation is performed and there is voltage present at terminal 21. Terminals 3i, 3u must not
be connected.
The built-in positioner controls the drive depending on the controller output signal y.
The control signal used is a voltage signal (0...10 V=) at terminal 3u, or a current signal at terminal
3i. If a control signal is present at both terminals (3u (0...10 V) and 3i (4...20 mA)) simultaneously,
the input with the higher value takes priority.
Mode of action 1 (mains voltage to internal connection 2a):
as the output signal increases, the valve shaft moves in and opens the valve (control passage).
Mode of action 2 (mains voltage to internal connection 2b):
as the output signal increases, the valve shaft moves out and closes the valve (control passage).
The starting point and the control span are fixed. To set partial ranges (and only for voltage input
3u), a split range unit is available as an accessory (see the split range unit function); this unit is
intended for installation in the drive.
After the voltage supply is applied and after initialisation, the drive moves to each valve stroke
between 0% and 100%, depending on the control signal. The electronics and the path
measurement system ensure that no stroke is lost, and the drive does not require re-initialisation at
intervals. When the end positions are reached, the position is checked, corrected as necessary and
stored again. This ensures parallel running of several drives of the same type. Feedback signal y0 =
0...10 V corresponds to the effective valve stroke of 0 to 100%.
If the control signal 0...10 V is interrupted in mode of action 1, the spindle moves out completely and
the valve is closed. So that the valve can be opened (direction of action 1), a voltage of 10 V must be
connected between terminals 1 and 3u, or it is necessary to switch over to direction of action 2.
The coding switch can be used to set the characteristic curve for the valve: linear, equal percentage
or quadratic. This characteristic curve can only be generated if the drive is used as a continuous
drive. Additional switches can be used to select the run times (applicable for 2-point, 3-point or
continuous function).
The module has a built-in switch which is automatically moved into the correct position when the
module is installed.
The function of terminals 21, 2a and 2b of the baseboard are taken over by terminals 41, 42 and 43
of the 230V module.
When the drive is used for a continuous signal, then the terminals 1, 3u, 3i and 44 of the baseboard
can be used similarly as in 24V operation and can be connected in accordance to the desired mode
of operation.
The coding switches on the baseboard have the same functions as with 24V operation.
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