Introduction
The SB250-N / SB2100-N two-beam detectors and the SB450-N / SB4100-N /
SB4200-N four-beam detectors generate an alarm when 1 or 2 beams are
interrupted, ignoring birds, small animals, dead leaves etc.
They consist of two identical detector modules equipped with detector cells
integrating both transmission and reception functions. These modules are
installed facing each other over the distance to be protected providing a non-
physical invisible detection zone.
Detectors are based on a system of pulsed infrared beams, and operate on four
user-selectable frequencies (channels), which allow avoiding any risk of
interference between detectors.
The SB450-N and SB4100-N barriers have 2 operating modes suitable for
different types of installation (see “Operating modes” on page 11):
• “AND” mode: Simultaneous obstruction of two adjacent cells
• “OR” mode: Obstruction of one of the cells
Refer to “Installing modules in columns” on page 14 for detailed information on
infrared barriers functionality in columns.
SB Series AIR Beam Detectors In
stallation Manual 1
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