Implementing the functions provided by the FSO-xx safety
functions module
You can order the drive with an FSO-12 or FSO-21 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-xx module have default values when delivered from the factory.
The wiring of the external safety circuit and configuration of the FSO-xx module are the
responsibility of the user.
The FSO-xx 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-xx.
See the appropriate manual for more information.
Code
Name
FSO-12 safety functions module user's manual
FSO-21 safety functions module user's manual
Using power factor compensation capacitors with the drive
Power factor compensation is not needed with AC drives. However, if a drive is to be
connected in a system with compensation capacitors installed, note the following
restrictions.
WARNING!
Do not connect power factor compensation capacitors or harmonic filters to the
motor cables (between the drive and the motor). They are not meant to be used
with AC drives and can cause permanent damage to the drive or themselves.
If there are power factor compensation capacitors in parallel with the input of the drive:
1. Do not connect a high-power capacitor to the power line while the drive is connected.
The connection will cause voltage transients that may trip or even damage the drive.
2. If capacitor load is increased/decreased step by step when the AC drive is connected
to the power line, make sure that the connection steps are low enough not to cause
voltage transients that would trip the drive.
3. Make sure that the power factor compensation unit is suitable for use in systems
with AC drives, ie, harmonic generating loads. In such systems, the compensation
unit should typically be equipped with a blocking reactor or harmonic filter.
78 Guidelines for planning the electrical installation
Содержание ACS880-11
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