Design and planning
System Description Service Robotics Modules
1004870-EN-05
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5.9
Planning an external reset device for a protective stop
device
The system or plant integrator is obligated to take the situations for protective stop into ac-
count in his risk analysis. The risk analysis must indicate which safety devices are required
and how the reset is to occur after the protective stop function has been triggered.
The reset device is effective for both an external protective stop device "Protective stop ex-
ternal" and a PSENmlock (PSENmlock 1, PSENmlock 2).
Automatic reset after a protective stop
Once the state that triggered the stop has been rectified, an automatic reset is the result.
For an automatic reset, in the control cabinet the two dedicated FS inputs must be perman-
ently connected to a 1-signal (see
Connections for external devices [
).
Manual reset after a protective stop
Once the state that triggered the stop has been rectified, the protective stop function can be
reset manually. For a manual reset, in the control cabinet the reset button must be connec-
ted to the dedicated FS input (see
Connections for external devices [
):
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Module A1.4, terminal 11 – Reset protective stop external OK
For the reset, the signal at the input (11) must change from 0 to 1 and then back to 0. The
reset is adopted when the sequence of pulse edge changes is detected - a rising edge (0 to
1) followed by a falling edge (1 to 0).