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8.1 Automatic operation
If the safety light curtains / light grids are used in the automatic mode, monitored
start is not possible.
The safety light curtains / light grids automatically return to operation with clear
protected area, the outputs (OSSDs) are activated.
Verify if this is compatible with the risk analysis of your machine.
In the automatic mode the OSSD1 and OSSD2 outputs follow the status of the
safety light curtains / light grids :
Protected area clear
Outputs = active logic "1"
Protected area interrupted
Outputs = deactivated logic "0"
8.2 Manual operation
Operation in the manual mode (Start / Restart) is always necessary when passage
to a hazardous area is to be monitored (persons can be present in the hazardous
area after accessing the protected area without being detected).
The start / restart button has to be outside the hazardous area. It has to be
installed so that the hazardous area and access can be clearly seen. It must not
be possible to activate the start / restart button from within the hazardous area.
In the manual mode the safety light curtains / safety light grids comply
with the function as "trip device" to IEC 61496. Non-compliance with this
standard can lead to a hazard for people.
The OSSD1 and OSSD2 safety outputs are activated when the protected area
is clear and the restart command is entered via a start button or via a respective
pulse on the K1_K2/Restart input.
If the safety light curtains / light grids are released by a person or an object, a
restart command (24 V on the K1_K2/Restart input) has to be released. Pulse
duration > 100 ms.
