FAAC 740, Manual

Page: 13 / 21

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ENGLISH
4.1. Connection of photocells and safety devices
Before connecting the photocells (or other devices) we advise you to
select the type of operation according to the movement area they have
to protect (see fig.3):
Opening safety devices: they operate only during the gate opening
movement and, therefore, they are suitable for protecting the area
between the opening leaf and fixed obstacles (walls, etc) against the
risk of impact and crushing.
Closing safety devices: they operate only during the gate closing mo-
vement and, therefore, they are suitable for protecting the closing area
against the risk of impact.
Opening/closing safety devices: they operate during the gate opening
and closing movements and, therefore, they are suitable for protecting
the opening and closing areas against the risk of impact.
“Edge” safety devices: they operate during the gate opening and closing
movements and, therefore, they are suitable for protecting the areas
between the moving leaf and fixed obstacles (pillars, walls, etc) against
the risk of shearing and dragging.
Encoder (optional): operates during the gate opening and closing move-
ments and, therefore, it is suitable for protecting the opening and closing
area against the risk of impact, crushing, shearing and dragging.
If two or more safety devices have the same function (opening, closing,
opening and closing, edge), the contacts must be connected to each
other in series (fig. 4). N.C. contacts must be used.
If safety devices are not used, jumper connect the terminals as shown in
fig. 5.
The most common photocell and safety device lay-outs are shown below
(from fig. 6 to fig. 13).
•
•
•
•
•
Fig. 3 Fig. 3
Fig. 4 Fig. 4
Connection of two N.C. contacts in series
(e.g. Photocells, Stop, Edge, etc.)
Connection of two N.C. contacts in series
(e.g. Photocells, Stop, Edge, etc.)
Fig. 5 Fig. 5
Connection of no safety device Connection of no safety device
Fig. 6 Fig. 6
Connection of a closing safety device and an opening safety device Connection of a closing safety device and an opening safety device
Fig. 7 Fig. 7
Connection of an “edge” safety device Connection of an “edge” safety device
Fig. 8 Fig. 8
Connection of a pair of photocells for opening Connection of a pair of photocells for opening
Fig. 9 Fig. 9
Connection of a pair of closing photocells Connection of a pair of closing photocells
Fig. 10 Fig. 10
Connection of a pair of opening photocells, a pair of closing photocell
and an edge safety device
Connection of a pair of opening photocells, a pair of closing photocell
and an edge safety device
Closing
photocells
Closing photocells
Opening or
opening/closing
photocells
"Edge" safety devices