ABB ACS880-207, Hardware Manual

Page: 34 / 148

Operating switch
The operating switch [S21] is a standard device.
By default, the operating switch controls the unit as follows:
• The ENABLE/RUN position: The control program closes the charging contactor [Q4] and
the main DC link is charged. After the DC link is charged, the main contactor [Q2] is
closed and the charging contactor [Q4] opened. The supply module starts operating.
• The OFF position: The control program opens the main contactor [Q2] and the supply
module stops rectifying.
Emergency stop button
The emergency stop button is an optional device ([S61], G331). Pressing the button
activates an emergency stop function of the supply unit. The button locks to open position
automatically. You must release the button before you can return to the normal operation.
Before the restart, you also need to reset the emergency stop circuit with a separate reset
button [S62]. See section
E-stop reset button (page 34) (included in all emergency stop
options) below.
E-stop reset button
The emergency stop reset button [S62] is automatically installed on the door when the
supply unit is equipped with an emergency stop function (oQ951, +Q952, +Q963,
+Q964 or +Q979). You can reset the emergency stop circuit with the button.
The functional safety oQ951, +Q952, +Q963, +Q964 and +Q979 are described in
separate option manuals. For the manuals, see section
Related documents .
Other door controls
• A voltage meter is an optional device ([P5], G334). There is a meter on the door
and a switch [S5] with which you can select which phase voltage value to display.
• An AC phase current meter is an optional device ([P2.1, P2.2, P2.3], G335). It
is also possible to have three meters on the door - one for each phase currents (option
+3G335).
• Tripping button for the supply breaker ([S22], Q959) is a push button on the
cabinet door for the user-defined use, for example, for tripping the breaker of the supply
transformer of the drive. The button is wired to a terminal block at the factory. The user
connects the external circuit to be controlled on site.
• An electrical on/off push button ([S23], G332) on the cabinet door for tripping the
supply unit. The button is connected in series with the operating switch. The button trips
the Run enable signal and further the main contactor of the drive.
34 Operation principle and hardware description