Functions
Leuze electronic
SOLID-4
19
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24V
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4.2.2
Start/restart interlock (RES)
The start/restart interlock function prevents the safety circuits from being released
automatically when the machine is turned on or the power supply is restored after a power
outage. Only by pressing and releasing the start button within a time window is the receiver
switched to the ON-state.
If the protective field is penetrated, the start/restart interlock function ensures that the
receiver will remain in the OFF state after the protective field is released again. The
receiver will then not be switched back to the ON state until the start button is pressed and
released again within a time window of 0.3 to 4 seconds.
Note!
The start button may not be pressed for longer than 10 seconds. An error message
appears if this is exceeded.
Warning!
Without the start/restart interlock, the receiver outputs immediately switch to the ON state
after the machine has been turned on or the power supply has been restored and after the
protective field has been freed! The operation of the protective device without start/restart
interlock is only permitted in a few exceptional cases and under the conditions of controlling
protective devices in accordance with EN ISO 12100-1 and EN ISO 12100-2. It must in
particular be ensured here that it is impossible to walk or slip through the protective field.
In the case of access guarding applications, the start/restart interlock function is obligatory
due to the fact that only access, and NOT the area between the protective field and the
points of operation is monitored.
Warning!
Before unlocking the start/restart interlock, the operator must be absolutely certain that
nobody is inside the danger zone.
Fig. 4.2-1:
Start/restart interlock function in effect when the supply voltage is turned
on
Fig. 4.2-2:
Start/restart interlock function after interrupting the protective field
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