Pilz PSEN op4B-S-3-080 - Manual (Page 20)

PSEN op4B Series Operating Manual
16
2.2.4 Use of deviating mirrors
Deviating mirrors can be used to monitor danger zones where access
is possible from various sides.
Fig. 10 illustrates a potential solution for monitoring three different
access sides using two deviating mirrors positioned at an angle of 45°
to the safety light curtain.
Fig. 10
Please note the following precautions to take when using deviating
mirrors:
• The alignment of the emitter (TX) and receiver (RX) is particularly
critical when you use deviating mirrors; just a slight angular
displacement of the mirror is enough to lose the alignment. This
problem can be resolved by using a laser pointer, which is
available as an accessory.
• The minimum safety distance (S) must be maintained for each
section of the safety light curtain.
• Use of a deviating mirror reduces the effective operating range by
about 15%. If two or more deviating mirrors are used, the range will
be reduced still further (for more details please refer to the
technical specifications for the specific mirror).
• Never use more than three mirrors per device.
• Any dust or dirt on the mirror’s reflective surface will drastically
reduce the operating range.