TA UDV, Installation Instructions Manual

Page: 12 / 16

12
2-point control signal
A continuous voltage is required at the valve for operation with a 2-point control signal. This
causes the motor to be rotated clockwise into its end position.
The Y control phase uses an integrated relay to switch the rotational direction to anti-
clockwise and the motor rotates to its other end position. If this Y control phase is switched
off again, the motor rotates clockwise back to the other end position ("virtual return spring").
Normally, a wire jumper needs to be established from above across the neutral connection
and the second terminal.
No earth connection is required, because the drive unit is safety insulated.
An external voltage may also be used for switching, if it cannot be ensured that the Y control
phase has the same phase angle (L1, L2, L3) as the continuous phase or originates from the
same electrical circuit:
N / neutral conductor
L / continuous phase
Y / control phase
Wire jumper
N / neutral conductor
L / continuous phase
Y / control phase
External control
voltage
230 V 50 Hz
N / neutral conductor