4.4.8
Smart presence detection
Overview
The safety light curtain features smart presence detection for access and hazardous
area protection. The function can be configured during commissioning.
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.
4.4.9
IO-Link
Overview
The IO-Link connector is used to establish a connection between suitable devices and
an IO-Link master, enabling communication via IO-Link.
The IO-Link connector can also be used to connect 2 muting sensors.
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
Complementary information
Detailed information on how the IO-Link connector is connected can be found in the
assembly instructions for the IO-Link connector.
4.4.10
Muting
Overview
Muting temporarily bypasses the protective action of the safety light curtain so that
material can be transported to or from a machine or system.
To use muting, muting sensors must be connected to the device.
Connection options:
•
Muting sensor signals are at the extension connection
The muting sensors must be arranged with an offset so that the signals arrive at
the device at different times.
•
Muting sensor signals are distributed on the system and extension connections
The muting sensors do not have to be arranged with an offset.
•
The muting sensors are connected to a muting connector
The muting connector makes it possible to connect 2 muting sensors and one
muting lamp. The muting sensors do not have to be arranged with an offset.
4
PROJECT PLANNING
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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