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 enables short-time maintenance work (like cleaning) on the non-electrical
parts of the machinery without switching off and disconnecting the drive. See the appropriate
user’s manual for the wiring, start-up and operation instructions.
Manual code (Eng-
lish)
User’s manualOption code
3AUA0000145922Prevention of unexpected start-up, with FSO-xx safety functions
module
+Q950
3AUA0000119894Prevention of unexpected start-up, with safety relay+Q957
￭ Multidrive modules
POUS is not available as an option from ABB.
Implementing the Safely-limited speed function
￭ Cabinet-installed multidrives
You can order the drive with Safely-limited speed function (option +Q966). It enables the
user to safely operate close to the machine at low speed, without stopping it.
For the wiring, start-up and operation instructions, see Safely-limited speed user’s manual.
￭ Multidrive modules
Safely-limited speed function is not available as an option from ABB. However, the cabinet
builder can implement it with an optional safety module available from ABB. See Implementing
the functions provided by the FSO-xx safety functions module (page 36).
Implementing the functions provided by the FSO-xx safety
functions module
￭ Cabinet-installed multidrives
You can order the drive 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-xx are at default when delivered from the factory. The wiring of the
external safety circuit and configuration of the FSO-xx module are the responsibility of the
machine builder.
The FSO-xx reserves the standard Safe torque off (STO) connection of the inverter control
unit. STO can still be utilized by other safety circuits through the FSO-xx.
For wiring instructions, safety data and more information on the functions provided by the
FSO-xx, refer to its manual.
36 Electrical planning guidelines
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