Principle of operation
Smart presence detection is implemented using a cascade. The guest system is only
active if the protective field of the host system has been interrupted. The OSSDs then
change to the OFF status and the machine is stopped. As long as the protective field of
the host or guest system is interrupted, machine start-up is not possible.
If all of the protective fields have been clear for at least 0.5 s, the OSSDs change back
to the ON state and the guest system returns to sleep mode.
Smart presence detection prevents an unintentional machine shut-off, for example if
chips fall into the hazardous area protected by the guest systems.
3.2.13
Muting
Muting temporarily bypasses the protective action of the safety light curtain so that
material can be transported to or from a machine or system. As a result, the work
process remains uninterrupted. The function can be configured during commissioning.
The distinction between people and materials is made by 2 signals that are independ‐
ent of each other. Based on the logical evaluation of these signals, the protective device
is bypassed if a valid muting condition is present. As soon as something other than
material enters the hazardous area, the work process is interrupted.
3.2.14
Partial blanking
During partial blanking, only the topmost beam of the protective field remains active if
a valid muting condition is present. All other beams are temporarily bypassed (e.g. for a
certain object height). As soon as the topmost beam is interrupted, the OSSDs switch to
the OFF status.
3.2.15
Smart Box Detection
Smart Box Detection enables human-material differentiation by conveying only geomet‐
rically uniform objects to or from a plant or machine.
The protective field always remains active, meaning interruption in the protective
field above an object is reliably detected by the protective device and the dangerous
machine state is stopped.
3.2.16
IO-Link
Overview
The safety light curtain can communicate with an IO-Link master via an IO-Link connec‐
tor, which is available as an accessory.
The following information can be output via IO-link:
•
Application diagnostic output status information
•
Device information and device status
•
Configuration of the device
•
Status of each individual light beam
•
Error history
•
Reasons for the last lockout
The following information can be controlled via IO-link:
•
LED signal behavior of the field indicator
•
LED light behavior of the integrated indicator lamp on the receiver (optional)
•
Switching on and off of the integrated laser alignment aid
3
PRODUCT DESCRIPTION
16
O P E R A T I N G I N S T R U C T I O N S | deTec4
8021645/1EB0/2022-04-28 | SICK
Subject to change without notice