LINK Systems Max Presence Sensing Device - Manual (Page 26)

Link Lite Black Max Section 3 - Installation
3-21
NOTE! The receiver unit of the Black
Max light curtain is designed to supply a
stop signal when far too much light is
received from the transmitter.
3.7 Aligning The Black M ax Trans-
mitter(s) and Receiver(s)
After setting the proper transmitter power
level, make sure that both the Black Max
transmitter and receiver enclosure doors are
closed and screwed shut. If the mounting
instructions in section 3.4 have been cor-
rectly followed, the acrylic lens on the
transmitter and receiver units should face
each other, the channel numbers beside the
acrylic lens on the transmitter and receiver
units should be directly across from each
other, the receiver and transmitter should be
mounted at the same height from the floor
and in the same plane. Final alignment must
now be done. Each transmitter channel of
the Black Max sends out a focused cone of
infrared light at a diverging angle rather like
a sharply focused flashlight. This beam of
light from a transmitter channel must fall
upon the similarly numbered receiver
channel. Also, each receiver channel has a
lens to provide a limited cone of view. Each
receiver channel must "look" at the
transmitter channel with similar number.
Figures 3.20 and 3.21 illustrate correct and
incorrect alignment from front and top
views, respectively.
Figure 3.20a: Black Max transmitter and
receiver out of alignment from front view.
Figure 3.20b: Black Max transmitter and
receiver in alignment from front view.
Figure 3.21a: Black Max transmitter and
receiver out of alignment from top view.
Figure 3.21b: Black Max transmitter and
receiver in of alignment from top view.
Figure 3.22 illustrates alignment of trans-
mitter and receiver from the side view. If
Black Max units are not aligned properly,
the receiver will not see the transmitter
light, and a continuous stop signal will be