ABB ACS880-304 +A018, Hardware Manual

Page: 33 / 280

Operation principle and hardware description 33
Supply unit control devices
A supply unit is typically controlled using the local control devices installed on the cabinet
door. No additional control connections are needed. However, it is possible to:
•
control the supply unit through the control panel and fieldbus
•
read the status information of the supply unit through the control panel, fieldbus and
relay output
•
stop the supply unit with an externally wired emergency stop button (if the unit is
equipped with an emergency stop option).
The supply unit I/O control interface is in internal use. See section Default I/O connection
diagram of the supply unit on page 232 .
The data in brackets, for example [Q1], refer to the item designations in ABB example
circuit diagrams.

Main disconnector [Q1]
You must equip the supply unit with a main disconnector. You can use either a main
switch-disconnector [Q1.1] or a withdrawable main breaker [Q1].

Auxiliary voltage switch [Q21]
You can equip the supply unit with an auxiliary voltage switch [Q21]. Using the switch, you
can disconnect the auxiliary circuit from the power line.

Operating switch [S21]
You can equip the supply unit with the two-position operating switch [S21]. Connect the
switch to Run/Enable digital input of the control unit.
By default, the operating switch controls the unit as follows:
•
The Run/Enable position: The control program receives the Run/Enable command
through the digital input DI2. The control program closes the main contactor [Q2] or
main breaker with relay output RO3. The supply unit starts rectifying and charging the
DC link of the drive.
•
The Off position: The control program does not receive the Run/Enable command
through the digital input. The program opens the main contactor [Q2] or main breaker
with the relay output and the supply module stops rectifying.
For more information on the on/off control logic, see ACS880 diode supply control program
firmware manual (3AUA0000103295 [English]).

Emergency stop button [S61] and emergency stop reset
button [S62]
You can equip the supply unit with an emergency stop button [S61] and an emergency
stop reset button [S62].
Note: The customer is fully responsible for implementing and testing the functional safety
circuits according to the relevant legislation and acceptance testing regulations. The
functional safety option manuals listed in section
List of related manuals on page 2 give
examples on implementing the safety circuits in ACS880 multidrives.