Bosch SBH301 Mode D'emploi page 46

46/148 Bosch Rexroth AG
5 Commissioning
Marginal conditions:
– 24 V internal power supply.
– Emergency stop operating device in ac-
cordance with ISO 60947-5-1.
– The maximum line length for the emer-
gengy stop circuit is 100 m.
– The voltage at the input between PS and
GND must be at least 19 V in view of the
tolerances. The PS input takes approx.
50 mA of power.
– According to DIN EN ISO 13849, the
emergency stop must be carried out as a
system emergency stop.
– The wiring and regular inspection of the
emergency stop operating device and
emergency stop switch devices (e.g.
PNOZ) should be carried out in accord-
ance with the device instructions.
– Safety-relevant wires, which are installed
to be moved, must be short and cross-cir-
cuit proof.
– The internal power supply for the emer-
gency stop function is defined as SELV.
The SELV must remain free of ground in
order to ensure the emergency stop func-
tion. The SELV must be regularly checked
to make sure that it is free of ground (no
accidental ground).
– The cables and lines (visual examination)
and the function of the emergency stop
circuit must be checked at regular inter-
vals.
The contactor in the servo amplifier (X20 at
SB30x) is directly connected to the emer-
gency stop circuit of the system. When the
emergency stop switch is activated, the con-
nection to the VM300 is interrupted. This may
also lead to error class 3 and 4 system errors.
However, this interruption is intended, which
means that the emergency stop switch is only
operated if a danger is truly present.
SBH.../SB... | 3 609 929 816/2009-02
The PLC or the switch on the hand-held nut-
runner switches the Cw/Ccw signal. In this
case, the Cw/Ccw signals can also be
passed via a bus system.
The solution with isolated emergency stop
wiring is to be preferred generally. It must be
used for nutrunners without sensors.
If higher safety requirements must be obser-
ved due to system-related conditions (e.g.
special machinery guidelines), the emergen-
cy stop concept should be considered sepa-
rately in connection with the nutrunners.