Operation Principle - ABB ACS880-07 User Manual

Operation principle

-T22
-A65
-Sxx
1) Reset (automatic)
Sxx POUS switch (user-defined)
Pxx POUS indication lamp (user-defined)
X969 STO terminal block
The dash-dot ( ) line in the figure indicates a user-defined installation.
Initial status: The drive is in operation and the motor is not running.
Step Operation
1. The user activates Prevention of unexpected start-up by switching off the POUS switch [Sxx].
2. The POUS safety relay [A65] de-energizes the XSTO inputs IN1 and IN2 of the drive control board
[A41].
The drive indicates the status. See section
3. The POUS indication lamp [Pxx] switches on.
4. The motor coasts to zero speed (if running) and cannot start while STO is active.
5. Normal operation resumes after the user:
• switches on the POUS switch [Sxx]
• resets the drive (if the STO indication parameter 31.22 has been set so that a fault is generated)
• makes sure that the drive has received the start signal (depends on the configuration, see the
firmware manual).
Control relays
24 V
1)
-Pxx
POUS indications
Option description and instructions 13
Drive control board
-A41
A65 POUS safety relay
A41 Control board (inverter unit)
T22 24 V power supply
on page 18.
XSTO
OUT
SGND
IN1
IN2
-X969
1-2
3-4