Enable/immediate stop without ramp function (e.g. for Emergency-Stop) [t-head1-first]

The digital input E2 is programmed in the factory so that it has the "Enable" function. The soft starter is enabled only when a High signal is applied to the terminal. The soft starter cannot be operated without enabling signal.

In the event of wire breakage or interruption of the signal by an Emergency-Stop circuit, the regulator in the soft starter is immediately blocked and the power circuit disconnected, and after that the "Run“ relay drops out.

Normally the drive is always stopped via a ramp function. When the operating conditions require an immediate de-energization, this is effected via the enabling signal.

Caution! [t-head3]

You must in all operating conditions always first stop the soft starter ("Run“ relay scanning), before you mechanically interrupt the power conductors. Otherwise a flowing current is interrupted – thus resulting in voltage peaks, which in rare cases may destroy the thyristors of the soft starter.