Honeywell FF-SB12 Series Installation Manual page 34

FF-SB12 and FF-SB14 Mounting
Two emitter/receiver units may be mounted together to obtain a greater protected height (see figure 2-10).
Mount the units head-to-head so the synchronization beams are as far apart as possible. Mount the
emitter/receiver units in a reverse transmitting position to prevent mutual interference or cross-talk. The units
may be mounted with the over-lapping heads to maintain the resolution throughout the protected height.
Figure 2-10 Two Emitter/Receiver Units Mounted Vertically
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107062-12 EN FR26 GLO 501 Printed in France