LiftMaster 772E Manual Del Usuario página 5

1
FUNCTION
The 772E is a photocell, consisting of a transmitter (TX) and a receiver (RX), with
a special evaluation and can be used only with appropriate Chamberlain products
(garage door openers and/or swing and sliding door operators).
The transmitter (TX) sends an infrared beam to the receiver (RX). An interruption
of the infrared beam is detected and transmitted to the controller.
A perfectly functioning photocell serves only to identify persons or objects
in the door area and does not ensure absolute safety from other hazards
arising from the door movement. If necessary, take additional protective
measures.
2
INSTALLATION OF GARAGE DOORS
(Sectional doors, overhead doors)
For the protection of young children, the photocell should not be installed
higher than 200 mm - 250 mm above the garage floor.
The sensors have to be fastened securely to a fixed component (e.g. post, wall).
Make sure that the infrared beam is not interrupted during the closing process
later by parts of the door (e.g. rails, rollers, springs, etc.). If this is not ensured,
upright columns (optional accessories) should be used (Fig. 8).
Transmitter and receiver have to be attached parallel to the closed door at a
height of 200 - max. 250 mm and precisely aligned to each other (Fig. 4 + 5).
Operation: When the infrared beam is interrupted during the closing
process, the door stops and reverses completely.
Note: When using a BAS300 for basculant overhead doors, a pair of photocells
must be installed for each door inside (for closing) and outside (for opening) of the
garage, because its control system allows the connection of two photocells (Fig.
e).For more details, please refer to the manual of the CB3 controller.
3
INSTALLATION OF SWING AND SLIDING DOORS
For the protection of young children, the photocell should not be installed
higher than 200 mm - 250 mm above the entrance.
The sensors must be secured on a fixed component (door pillar) and outside of
the movement range of the door wings (swing doors). If this is not ensured,
upright columns (optional accessories) should be used (Fig. 8). Transmitter and
receiver have to be attached parallel to the closed door at a height of 200 - max.
250 mm and precisely aligned to each other (Fig. 3a).
Note: Controllers of the swing and sliding doors allow the connection of multiple
pairs of photocells.