Notes About Connections; Adjustments - Nice Mindy A6 Instructions Et Recommandations Pour L'installateur

3.5) Notes about connections

For the most part, connections are easy; a lot of them are direct connections to a single user point or contact but some are a little more
complex:
All the single-phase asynchronous motors need a capacitor for them to work properly; some gearmotors have this capacitor already con-
nected inside while others have to have the capacitor connected externally. In this case, the capacitor must be connected between the
motor's OPEN and CLOSE phases. To be more practical the capacitor should be connected directly inside the unit in the spaces left for it.
The following is applicable only to the A700F version
A particular description is given about the "Phototest" output which
is nothing else but the best possible solution in terms of reliability as
regards safety devices. Each time a manoeuvre is activated the rel-
evant safety devices are checked and only if everything is in order will
the manoeuvre start.
Should the test be unsuccessful (the photocell is blinded by the sun,
cables have short circuited, etc.) the failure is found and the
manoeuvre is not carried out.
All this is possible only by using a certain configuration in the safety
devices' connections (Fig. 5).
As you can see from the wiring diagram, while the receivers of the
photoelectric cells PHOTOCELL, PHOTOCELL 1 (and PHOTOCELL
2 if it exists - on the PIU' card) are normally supplied by the acces-
sories' 24 V a.c., the transmitters take their power from the pho-
totest output. When movement is requested, first of all it is verified
that all the receivers involved in the movement give their consent
then the phototest output is turned off after which it is checked that
all the receivers signal the fact by removing their consent; lastly, the
phototest output is reactivated and consent of all the receivers is ver-
ified once again.
As you can see, synchronism has been activated on the two trans-
mitters by cutting the jumpers, this is the only way to guarantee that
the two pairs of photoelectric cells do not interfere with one another.
Check the instructions in the photocell manual regarding synchro-
nised functioning.
If the "PHOTOCELL" input is not going to be used its terminal must be jumpered via the 24 VAC relay connected on the
PHOTOCELL TEST output.
• As a rule gearmotors are used on 2-wing gates that do not need limit switches; it is normal practice to install mechanical stops that stop
movement in the point wanted. There is also a "Working Time" trimmer on the control unit that is usually set for a time slightly longer than
the time actually needed for the complete manoeuvre. When the gate reaches the mechanical stop the motor stops and remains under
stress for the rest of the time; the motors are always designed to withstand this kind of stress without any trouble, especially if the force is
set at values lower than 100%.
• In some installations, like for instance in the case of two sliding gates or if you wish to exploit the positioning function, limit switches might
be needed. In the majority of cases, if limit switches are used they are the normally closed "NC" type so that if a failure does occur it will
cause the motor to stop without the gate getting stuck. In other cases, like for example when magnetic type contacts are used, it is pos-
sible that normally open type limit switches have to be used "NO". To enable the control unit to use NO type limit switches you have to cut
the FC jumper on the card (Fig. 2). This jumper can also be cut even if limit switches are not used which will avoid having to install the rel-
ative jumpers.
• Depending on the type of gearmotor and on the function you wish to achieve, the limit switches can be used as indicators of the end of
travel point (limit switch function) or to signal the starting point of the positioning function. If they are used for positioning, they are normal-
ly installed at an angle of 10-20° from the stopping point and they indicate the point at which an even weaker force will be applied to the
motors, adjustable by means of the POSITIONING FORCE trimmer, so the gate will stop mechanically as gently as possible.

4) Adjustments

TLM = Increased Working Time
TL = Working Time
TP = Pause Time
TRA = Opening Delay Time
TRC = Closing Delay Time
F = Force
FP = Positioning Force
If the gate has 2 wings that could get bump into each other if, when opening, they start simultaneously or, when closing, one moves on top
of the other, you will have to readjust the Opening Delay Time trimmer "TRA" or the Closing Delay Time trimmer "TRC". These trimmers can
be adjusted to your liking, although as a rule the TRA is set for the time actually needed and the wing moved by the 2nd motor is already
out of the way when the 1st motor starts.
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