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Fig.
Fig. 8
Fig. 7
Fig. 6
Fig. 5
Fig.
Fig. 9
Connection of a closing safety device and an opening
safety device
Connection of no safety device
Connection of an "edge" safety device
Connection of a pair of opening photocells
Connection of a pair of closing photocells
Before connecting the safety devices and photocells we advise
you to select the type of operation according to the movement
area they have to protect (see fig.3 for example):
Opening safety devices:
they are tripped when an obstacle is
detected only during gate opening movement. They
cause immediate closure and resumption of opening
motion on release (see programming in par.5.2).
Closing safety devices:
they are tripped when an obstacle is
detected only during gate closing movement. They
cause re-opening, either immediate or on release (see
programming in par.5.2).
Opening/closing safety devices:
they are tripped during the
gate opening and closing movements. They cause
stopping and restart motion on release.
"Edge" safety devices:
they are tripped during the gate opening
and closing movements. They cause immediate
reversal of motion and stopping after two seconds.
Encoder:
it is tripped if there is an obstacle during gate opening
and closing movements. It causes immediate reversal
of motion and stopping after two seconds.
Note: in operators for industrial sectional doors, the
anti-crushing function is not tripped during closing,
because the operator acts on the rope shaft and not
directly on the door.
N.B. 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.
N.B: 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).
NOTE: The 578D equipment is able to command electro-mechanical
operators for sliding gates and industrial sectional doors. Anything
referring to gates in these instructions also applies to doors. Any
differences are shown in the specific paragraphs.
Closing
photocells
Opening or
opening/closing
photocells
"Edge" safety devices
4.1 Connection of photocells and safety devices
Closing photocells
Connection of two N.C. contacts in series
(e.g. Photocells, Stop, Edge, etc.)
