4.3.3.1
Using reversed direction of transmission
The direction of transmission of the system
"
can be changed during mounting by
switching the positions of the sender and receiver. With reversed direction of mounting,
the receiver
"
is not affected by the infrared light from the sender
!
.
"
!
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
r
s
r
Figure 11: Trouble-free operation due to reversed direction of transmission of system
1
and sys‐
tem
2
4.4
Integrating into the electrical control
This chapter contains important information about integration in the electrical control.
Information about the individual steps for electrical installation of the device:
.
Requirements for use
The output signals of the protective device must be analyzed by downstream controllers
in such a way that the dangerous state of the machine is ended safely. Depending on
the safety concept, the signal is analyzed by, e.g., safety relays or a safety controller.
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.
•
It must be possible to electrically influence the control of the machine.
•
The electrical control of the machine must meet the requirements of IEC 60204-1.
•
Depending on the regulations which apply at the place of installation, a restart
interlock may be required. Because the multiple light beam safety device does not
have this function, it must be implemented in the external control if required.
•
When using a safety controller, different signal levels of both OSSDs must be
detected depending on the regulations which apply at the place of installation or
the required reliability of the safety function. The maximum discrepancy time toler‐
ated by the control must be selected according to the application.
•
The OSSD1 and OSSD2 output signals must not be connected to each other.
•
In the machine controller, the signals of both OSSDs must be processed sepa‐
rately.
4
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