When using safety light barriers, the effective standards and guidelines must be observed! (The local authorities or
trade associations will provide you with the relevant information.
On request by the customer, the Fiessler Elektronik company will carry out the initial approval and annual inspection. In
addition, customer-training seminars concerning the implementation of the annual inspection are held at regular intervals.
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FIESSLER
E L E K T R O N I K
2 Prerequisites for the use of safety light barriers
- The unintentional repetition of a hazardous movement
must be prevented by the appropriate safety facilities.
- The safety category (Type 4) of the accident-prevention
light barrier should be at least the same as safety
category of the machine.
- Approval:
Approval of the construction and the tests should be
carried out by competent personnel who are in
possession of all information provided by the supplier of
the machine and the BWS.
- Annual
inspection:
The operator must ensure that a competent person is
assigned the task of inspecting the light barrier on a
yearly basis. This person may, for example, comprise an
employee of the light barrier manufacturer or of the
operator.
BA - ULVT
- It must be possible for the hazardous condition of a
machine to be eliminated by the sensor function.
- The safety distance between the protective field and the
hazardous area must be large enough to ensure that
when penetrating the protective field, the hazardous areas
cannot be reached before the hazardous movement is
interrupted or ended.
- Access to the hazardous area must only be possible
through the protective field (reaching under, over or
around the field must not be possible.
- Passing through the light barrier must only be possible
if the restart interlock is activated subsequent to the light
barrier being interrupted.
A new command to activate the next hazardous
movement must only be implemented via a dead-man
switch. It must not be possible for this start button to be
actuated from within the hazardous area: The switch must
be located at a point from which the accessible area can
be viewed without obstruction.
