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1.4 Brief Explanation of Function- and Operating Modes
Auto Floating Blanking
This operating mode is the same as Floating Blanking, except that in this case the object (for example a skid carrier
or lifting forks) moves through and exits the safety field. The direction at which the object enters and exits the safety
field, as well as its dwell time within the safety field, must be defined. Any other intrusions into the safety field cause
the safety output to switch and stop hazardous motion.
Cascading
Safety devices can be series connected such that they all drive a single safety output in order to monitor several
safety fields simultaneously. Cascaded safety devices demonstrate the same performance characteristics as a sin-
gle safety device.
Contactor Monitoring
An operating mode for which switching performance of the contacts at an external relay is dynamically monitored.
The contacts must close fully within a specified period of time.
Fix Blanking
This operating mode is required for applications including objects which continuously protrude into the safety field,
thus interrupting specific light beams originating from the safety light curtain. Intrusions into any other point within
the safety field cause the output to switch and stop hazardous motion.
Floating Blanking
This operating mode is the same as Fix Blanking, except that in this case the object (for example a cable or a cutting
edge) is permitted to move within the safety field. Any other intrusions into the safety field cause the safety output
to switch and stop hazardous motion.
Reduced Resolution
This function reduces the resolution electronically. Thus objects that are smaller than the selected resolution don’t
deactivate the safety output. The function can also be used to prevent machining chips from interfering with correct
functioning of the safety light curtain.
Restart Inhibit
A function which prevents a machine from starting up automatically after it has been switched on. The machine can
only be enabled by activating an acknowledgement key.
Safety Operating Mode
In this operating mode, the switching outputs are disabled when the safety field is penetrated. The switching outputs
are automatically enabled after penetration of the safety field is ended.
Safety Output – OSSD (Output Signal Switching Device)
The output of the contactless safety device which is connected to the machine controls. The safety output is deac-
tivated when the safety field is interrupted.
Signal Output
A semiconductor output for auxiliary functions without safety monitoring.
Start-Up Inhibit
This function is activated along with the „Restart Inhibit Function“. When power supply is switched on (e.g. after a
power failure), the safety outputs (OSSD) remain in the off state. Acknowledgement is accomplished by activating
an acknowledgment key.
