. MAXIMUM USE CURVE
The curve makes it possible to
establish maximum work time (T)
according to use frequency (F).
With reference to IEC 34-1 Stan-
dard, the 740-741 gearmotor with
an S3 duty, can operate at a use
frequency of 30-40%.
To ensure efficient operation, it is
necessary to operate in the work
range below the curve.
Important:
The curve is obtained
at a temperature of 20°C.
Exposure to the direct sun rays
can reduce use frequency
down to 20%.
Calculation of use frequency
Use frequency is the percentage
of effective work time (o closing) compared to total time
of cycle (o c pause times).
Calculation formula:
Ta + Tc
% F =
X 100
Ta + Tc + Tp + Ti
where:
Ta = opening time
Tc = closing time
Tp = pause time
Ti = time of interval between two complete cycles
4. ELECTRICAL SET-UP (standard system)
5. INSTALLING THE AUTOMATED SYSTEM
5.. Preliminary checks
To ensure safety and efficiency of the automated system, make
sure the following requirements are observed before installing the
system:
• The gate structure must be suitable for automation. The following
are necessary in particular: wheel diameter must be in proportion
to the weight of the gate, an upper track must be provided, plus
mechanical travel stops to prevent the gate derailing.
• The soil must guarantee a perfect stability of the foundation
plinth.
• There must be no pipes or electric cables in the plinth excavation
area.
• If the gearmotor is located in the vehicle transit or manoeuvre
area, adequate means of protection should be provided against
accidental impact.
• Check if an efficient ear-
thing is available for con-
nection to the gearmotor.
5.2. Masonry for foun-
dation plate
1- Assemble the foundation
plate as shown in figure
04.
2- In order to ensure that the
pinion and rack engage
correctly, the foundation plate must be positioned as shown in
Fig. 05 (right closing) or Fig. 06 (left closing).
Warning: The arrow on the foundation plate must always point to
the gate, see Figs. 05-06.
3- After determining the position of the foundation plate, make a
plinth as shown in Fig. 07 and wall the plate, providing several
sheaths for routing the cables. Using a spirit level, check if the
plate is perfectly level. Wait for the cement to set.
4- Lay the electric cables for connection to the accessories and
power supply as shown in diagram of Fig. 03. To facilitate con-
nections to the control unit, allow the cables to protrude by at
least 50 cm from the hole on the
foundation plate.
5.. Mechanical installation
1- Remove the cover, Fig. 08 ref. 1.
2- Position the operator on the foun-
dation plate, using the supplied
washers and nuts as shown in Fig.
09. During this operation, route the
cables through the appropriate
openings in the motor body (See
Fig.01 ref.9). If necessary, the two
holes can be joined using a ham-
mer to obtain a wider space.
3- Adjust the height of the gearmotor
and the distance from the gate, referring to dimensions in Fig.
10.
Attention: This operation is
necessary to ensure the rack
is correctly secured and to
enable any new adjustments.
4- Secure the gearmotor to the
plate, tightening the nuts.
5- Prepare the operator for ma-
nual operation as described in
paragraph 8.
10
20
30
40
50
60
70
80
90
100
0
1
2
3
4
5
6
7
8
9
10
10 11 12
P ercentuale
di lav. %
Tiempo (h)
% Duty cycle
% F réquence
d'utilis ation
% B enutzungs -
frequenz
% F recuencia
de utilización
Zeit (S td.)
Temps (h)
Time (h)
Tempo (h)
Fig.03
1- Operator with unit
2- Photocells
3- Key-operated push button
4- Flashing lamp
5- Radio receiver
60
-8
0
90
°
0÷50
56
±5
Fig.05
Values are expressed in mm
0÷50
90
°
56
±5
Fig.06
Values are expressed in mm
Fig.07
Values are expressed in mm
320
335
10
0
106
180
200
89,5
Fig.08
Fig.04
Values are expressed in mm
Fig.09
Summary of Contents for 741
Page 1: ...740 741...
