10
Fitting the refl ective beam detector
Remove the detector housing before installation
to prevent it becoming dislodged during the in-
stallation process.
Position the beam and refl ectors on solid struc-
tures at between 0.3 and 0.6 metres below ceiling
level. The correct number of refl ectors (prisms)
should be mounted directly opposite to and fac-
ing the beam detector. Do not install refl ectors
on glass or other refl ecting surfaces.
Ensure that there is a clear line of sight to the
detector, taking care that no moving objects
i.e. doors, mechanical lifting equipment etc, will
interfere with the beam path.
Using the template provided mark the 4 fi xing
points on the structure and drill holes. The rear
mounting plate of the beam detector assembly
has 4 keyhole apertures to allow easy installation
onto the 4 fi xing points.
Connect the loop wiring to the terminal block at
the back of the beam detector (Fig 5). The small
2-pin connector on the left is not used. The beam
detector is polarity sensitive and will operate only
if wired correctly.
Secure the beam detector assembly to the fi xing
points and replace the housing.
Loop in/out
+ – + –
Fig 5 Loop connection diagram
Fig 4 Refl ectors for 50m refl ective beam
detector (left) and 100m detector
