Banner EZ-SCREEN­ Safety Light Curtain Systems - Manual (Page 53)

page 53
Banner Engineering Corp. • Minneapolis, MN U.S.A.
www.bannerengineering.com • Tel: 763.544.3164
Periodic Checkout Procedures
EZ-SCREEN Grid
Instruction Manual
6.3 Commissioning Checkout
Perform this checkout procedure as part of System installation (after the
System has been interfaced to the guarded machine as described in Section
3.7), or whenever changes are made to the System (either a new
configuration of the EZ-SCREEN System or changes to the machine). A
Qualified Person (as defined in the Safety Glossary) must perform the procedure;
checkout results should be recorded and kept on or near the guarded machine,
per OSHA 1910.217(e)(1).
To prepare the System for this checkout, set the System configuration as it will
be during machine operation.
1) Examine the guarded machine to verify that it is of a type and design
compatible with the EZ-SCREEN Grid System. See page 2 for a list of
misapplications.
2) Verify that the minimum separation distance from the closest danger point of
the guarded machine to the Safety Light Grid is not less than the calculated
distance, per Section 3.3.1 of this manual.
3) Verify that
• Access to any dangerous parts of the guarded machine is not possible
from any direction not protected by the EZ-SCREEN Grid System, hard
guarding, or supplemental safeguarding, and
• It is not possible for a person to stand between the Safety Light Grid and
the dangerous parts of the machine, or
• Supplemental safeguarding and hard guarding, as described by the
appropriate safety standards, are in place and functioning properly in any
space (between the Safety Light Grid and any hazard) which is large
enough to allow a person to stand undetected by the EZ-SCREEN Grid
System.
4) Verify that the Reset switch is mounted outside the guarded area, out of
reach of anyone inside the guarded area, and that the key or other means of
preventing inadvertent use is in place.
5) Examine the electrical wiring connections between the EZ-SCREEN Grid
System OSSD outputs and the guarded machine’s control elements to verify
that the wiring meets the requirements stated in Section 3.7.
6) Inspect the area near the light grid (including work pieces and the guarded
machine) for reflective surfaces. (Reflective surfaces may cause System
beams to reflect around a person in the light grid, preventing the person
from being detected and not stopping the machine motion.) Remove the
reflective surfaces as possible by relocating them, painting, masking or
roughening them. Remaining problem reflections will become apparent
during step 10.
7) Apply power to the EZ-SCREEN Grid System. Ensure that power to the
guarded machine is OFF. Remove all obstructions from the light grid. If the
System is configured for Latch mode, the receiver Reset indicator will be
double-flashing. Perform a manual reset (close the Reset switch for 1/4 to 2
seconds, then open the switch). Verify that the Reset indicator is ON steady.