2 Safety
2.2. Safety features according to 13849-1
QSC is a safety system that complies with SS EN ISO 13849-1:2008. This means there
are risks in the system that are managed with the aid of software.
RISK 1
Risk that one of the system's quick hitch locks opens at the wrong time. This could lead to
tool disconnection and cause damage.
The risk is managed by “Safety function 1” (SF1) – blocking power to the quick hitch lock’s
solenoids. SF1: SS-EN ISO 13849-1:2008 Category 2 PL d
The following applies in all operating modes:
The quick hitch lock’s solenoids for the machine lock must not be powered
unless the operator simultaneously depresses both of the machine lock’s
activation buttons.
The quick hitch lock’s solenoids for the tiltrotator lock must not be powered
unless the operator simultaneously depresses both of the tiltrotator lock’s
activation buttons.
RISK 2
Risk that the system activates the quick hitch lock’s solenoid without tool release until
much later.
The risk is managed by “Safety function 2” (SF2) – monitoring by means of warning signal
in the panel module. SF2: SS-EN ISO 13849-1:2008 Category 2 PL c
The safety system must check that the following points are complied with:
The warning signal must sound when one of the quick hitch lock’s solenoids 1 or
2 is powered.
The warning signal must be activated for at least 1 second at system start-up as
a function test.
If any of these points is not satisfied, the power to quick hitch lock solenoid 1 and quick
hitch lock solenoid 2 must be blocked until the system is restarted.
RISK 3
Risk that the system unintentionally activates pressure in the machine's extra hydraulics.
This risk is managed by “Safety function 3” (SF3) – prevention of unintentional activation
of pressure SF3: SS-EN ISO 13849-1:2008 Category 2 PL d
The following applies in all operating modes:
When neither of the quick hitch lock’s buttons for opening or closing the
machine lock is depressed, pressure may not be activated.
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