Guidelines for planning the electrical installation 71
Implementing the ATEX-certified Safe motor
disconnection function (option +Q971)
With option +Q971, the drive provides ATEX-certified safe motor disconnection without
contactor using the drive Safe torque off function. For more information, see ACS880
ATEX-certified Safe disconnection function application guide (3AUA0000132231 [English])
or FPTC-02 ATEX-certified thermistor protection module, Ex II (2) GD (option
+L537+Q971) for ACS880 drives user’s manual (3AXD50000027782 [English]).
Implementing safety functions provided by the FSO
safety functions module (options +Q972 and +Q973)
The drive can be equipped with an FSO-xx safety functions module (option +Q972 or
+Q973) which enables the implementation of functions such as Safe brake control (SBC),
Safe stop 1 (SS1), Safe stop emergency (SSE), Safely limited speed (SLS) and Safe
maximum speed (SMS).
The settings of the FSO module are at default when delivered from the factory. The wiring
of the safety circuit and configuration of the FSO module are the responsibility of the
machine builder.
The FSO module reserves the standard Safe torque off (STO) connection of the drive
control unit. STO can still be utilized by other safety circuits through the FSO.
For wiring instructions, safety data and more information on the functions provided by the
options, see FSO-12 safety functions module user’s manual (3AXD50000015612
[English]) or FSO-21 safety functions module user’s manual (3AXD50000015614
[English]).
Declaration of Conformity
See section EU Declaration of Conformity (Machinery Directive) page 202.
Implementing the Power loss ride-through function
Implement the power loss ride-through function as follows:
1. Check that the power-loss ride-through function of the drive is enabled with parameter
30.31 Undervoltage control in the ACS880 primary control program.
2. If the installation is equipped with a main contactor, prevent its tripping at the input
power break. For example, use a time delay relay (hold) in the contactor control circuit.
WARNING! Make sure that the flying restart of the motor will not cause any
danger. If you are in doubt, do not implement the power-loss ride-through
function.
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