DMI
48
11/04 MN01219002Z-EN
• Reversing star-delta starter
Selecting
S/D rev. st.
enables the motor to be started in
either direction with a star/delta circuit.
The inputs are used according to the type of control circuit
devices selected:
On startup, the mains contactor is not switched until 100 ms
after the star contactor has switched in order to allow an
optimum dimensioning of the star contactor. The
changeover time from star to delta operation can be set
between 100 and 99900 ms in 100 ms steps via the
Changeover t parameter in the Motor st. menu.
With the switch-over from star to delta operation the delta
contactor switches only approx. 100 ms after the star
contactor control has been terminated.
In order to protect the system, the DMI implements a
reclosing lockout that lasts for 100 ms after disconnection or
after a direction change. Only after this time interval is a
restart or direction change possible. Earlier inputs are
ignored. Actuating both switches or “ON” pushbuttons is
ignored, i.e. the motor retains its state.
Inputs
Switch
I1
Anticlockwise rotation
I3
Clockwise rotation
Pushbut
tons
I1
Anticlockwise rotation
I2
OFF
I3
Clockwise rotation
Outputs
Q0
Mains contactor,
anticlockwise
Q1
Mains contactor,
clockwise
Q2
Star contactor
Q3
Delta contactor
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