DANGER
H
azard due to lack of effectiveness of the protective device
In the case of non-compliance, it is possible that the dangerous state of the machine
may not be stopped or not stopped in a timely manner.
Downstream contactors must be positively guided and monitored depending on appli‐
cable national regulations or required reliability of the safety function.
b
Make sure that downstream contactors are monitored (external device monitoring,
EDM).
NOTE
Bec
ause the protective device does not have integrated external device monitoring, this
must be implemented in the external control, if required.
Requirements for the electrical control of the machine
Bo
th outputs are short-circuit protected to 24VDC and 0V. When the protective field
is clear, the OSSDs are in the ON state. When a switch-off condition is present (e.g.,
interruption in the light path), the OSSDs are in the OFF state. In the event of a device
fault, at least one OSSD is in the OFF state.
The protective device complies with the rules for electromagnetic compatibility (EMC)
for the industrial sector (Radio Safety Class A).
Radio interference cannot be ruled out when used in residential areas.
The following requirements are met:
•
The external voltage supply of the protective device must be capable of buffering
brief power failures of 20ms as specified in IEC60204-1.
•
The power supply unit must ensure safe isolation according to IEC61140
(SELV/PELV). Suitable power supply units are available as accessories from SICK.
Further topics
•
"A
ccessories", page 59
4.4.1 Restart interlock
Overview
T
he restart interlock prevents the machine from automatically starting up, for example
after a protective device has responded while the machine is operating or after chang‐
ing the machine’s operating mode.
Depending on the regulations which apply at the place of installation, a restart interlock
may be required.
The protective device does not have an internal restart interlock. You must therefore
im
plement a restart interlock externally via the circuitry or the control if needed, e.g. in
connection with the SICK RLY3-OSSD2/RLY3-OSSD3 safety relay.
Principle of operation
Before the machine can be restarted, the operator must reset the restart interlock.
PROJECT PLANNING 4
8024467/1GWF/2022-11-11 | SICK O P E R A T I N G I N S T R U C T I O N S | deTec4 Core Vibes
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Subject to change without notice