DANGER
Hazard 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 applic‐
able national regulations or required reliability of the safety function.
b
Make sure that downstream contactors are monitored (external device monitoring,
EDM).
Requirements for the electrical control of the machine
Both outputs are short-circuit protected to 24 V DC and 0 V. When the light path is
clear, the OSSDs are in the ON state. When a switch-off condition is present (e.g., inter‐
ruption 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 multiple light beam safety device complies with the rules for electromagnetic com‐
patibility (EMC) for the industrial sector (Radio Safety Class A).
NOTE
Using the device in residential areas may cause radio interference. The operating entity
is responsible for taking appropriate measures (e.g., shielding).
DANGER
Hazard 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.
b
Make sure that the following control and electrical requirements are met so that
the multiple light beam safety device can fulfill its protective function.
•
The external voltage supply of the multiple light beam safety device must be capa‐
ble of buffering brief power failures of 20 ms as specified in IEC 60204-1.
•
The power supply unit must provide safe isolation according to IEC 61140
(SELV/PELV). Suitable power supply units are available as accessories from SICK,
.
4.4.1
Restart interlock
Overview
The multiple light beam safety device has an internal restart interlock.
Depending on the regulations which apply at the place of installation, a restart interlock
may be required.
The 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.
PROJECT PLANNING
4
8024782/2019-11-19 | SICK
O P E R A T I N G I N S T R U C T I O N S | deTem4 A/P
37
Subject to change without notice