Implementing The Emergency Stop Function; Cabinet-Installed Multidrives; Multidrive Modules; Implementing The Safe Torque Off Function - ABB ACS880 Electrical Planning Instructions

Note: As standard, the drive contains capacitors connected between the main circuit and
the frame. These capacitors and long motor cables increase the ground leakage current
and may cause fault current circuit breakers to function.

Implementing the Emergency stop function

Cabinet-installed multidrives

￭
You can order the drive with an emergency stop function (option).
See the appropriate option manual for more information.
Option code User's manual
+Q951 Emergency stop, stop category 0 with opening the main contactor
or breaker with safety relays
+Q952 Emergency stop, stop category 1 with opening the main contactor
or breaker with safety relays
+Q963 Emergency stop, stop category 0 without opening the main con-
tactor or breaker with safety relays
+Q964 Emergency stop, stop category 1 without opening the main con-
tactor or breaker with safety relays
+Q979 Emergency stop, configurable stop category 0 or 1 with FSO-xx
safety functions module

Multidrive modules

￭
For safety reasons, install the emergency stop devices at each operator control station and
at other operating stations where emergency stop may be needed. Implement the emergency
stop according to relevant standards.
Note: You can use the Safe torque off function of the drive to implement the Emergency
stop function.

Implementing the Safe torque off function

The safe torque off (STO) input is available as standard in all inverter units. See the inverter
unit hardware manual for implementing the Safe torque off function.
Implementing the Prevention of unexpected start-up
function
Cabinet-installed multidrives
￭
You can order the drive with a Prevention of unexpected start-up (POUS) function. The
POUS function disables the control voltage of the power semiconductors of the drive (inverter)
output stage. This prevents the drive from generating the torque required to rotate the motor.
POUS enables a short-time maintenance work (like cleaning) on the non-electrical parts of
the machinery without switching off and disconnecting the drive.
See the appropriate option manual for more information.
Electrical planning guidelines 37
Manual code (Eng-
lish)
3AUA0000119885
3AUA0000119886
3AUA0000119891
3AUA0000119893
3AUA0000145933